Abstract

We present a facile fabrication process to directly fabricate cone-shaped microwells arrays on single crystal Y3Al5O12:Ce3+ (YAG:Ce) ceramic phosphor platelets (CPPs) by short-pulse laser direct patterning. Compared to unpatterned YAG:Ce CPP with smooth surface, the forward-to-total ratio of emission photons of patterned YAG:Ce CPPs was enhanced from 53.2% up to 78.2%, and the total emission within 4-π degree is 6% higher. The fabricated patterns are also beneficial in increasing the color conversion efficiency of YAG:Ce CPPs by 7.6%. The patterned YAG:Ce CPPs display much better correlated color temperature (CCT) uniformity under varied currents. The angular correlated color temperature uniformity (ACU) of patterned YAG:Ce CPPs reaches as high as 0.933 compared to 0.730 of the unpatterned one. These results suggest that laser patterning of YAG:Ce CPP could effectively manipulate its luminance, chromaticity and illumination pattern, which may lead to further technological advancements for diversified applications of film-type CPPs in highly efficient white LEDs.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Enhanced forward efficiency of Y3Al5O12:Ce3+ phosphor from white light-emitting diodes using blue-pass yellow-reflection filter

Jeong Rok Oh, Sang-Hwan Cho, Yong-Hee Lee, and Young Rag Do
Opt. Express 17(9) 7450-7457 (2009)

2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes

Hoo Keun Park, Jeong Rok Oh, and Young Rag Do
Opt. Express 19(25) 25593-25601 (2011)

Angular color uniformity enhancement of white light-emitting diodes by remote micro-patterned phosphor film

Shudong Yu, Zongtao Li, Guanwei Liang, Yong Tang, Binhai Yu, and Kaihang Chen
Photon. Res. 4(4) 140-145 (2016)

References

  • View by:
  • |
  • |
  • |

  1. E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
    [Crossref] [PubMed]
  2. S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
    [Crossref]
  3. R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
    [Crossref]
  4. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
    [Crossref]
  5. H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express 20(9), 10218–10228 (2012).
    [Crossref] [PubMed]
  6. C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles (Wiley, 1983), Chap. 5.
  7. S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
    [Crossref]
  8. C. C. Lin and R. S. Liu, “Advances in Phosphors for Light-emitting Diodes,” J. Phys. Chem. Lett. 2(11), 1268–1277 (2011).
    [Crossref] [PubMed]
  9. S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
    [Crossref]
  10. H. K. Park, J. R. Oh, and Y. R. Do, “2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes,” Opt. Express 19(25), 25593–25601 (2011).
    [Crossref] [PubMed]
  11. J. W. Kim and Y. J. Kim, “The effects of substrates and deposition parameters on the growing and luminescent properties of Y3Al5O12:Ce thin films,” Opt. Mater. 28(5), 698–702 (2006).
    [Crossref]
  12. R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
    [Crossref]
  13. S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
    [Crossref]
  14. J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
    [Crossref]
  15. C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
    [Crossref]
  16. A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
    [Crossref]
  17. G. S. Corman, “Creep of yttrium aluminium garnet single crystals,” J. Mater. Sci. Lett. 12(6), 379–382 (1993).
    [Crossref]
  18. R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
    [Crossref]
  19. S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
    [Crossref]
  20. H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
    [Crossref]
  21. S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
    [Crossref]
  22. A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
    [Crossref] [PubMed]
  23. A. Mao and R. F. Karlicek., “Surface patterning of nonscattering phosphors for light extraction,” Opt. Lett. 38(15), 2796–2799 (2013).
    [Crossref] [PubMed]
  24. B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, and M. D. Perry, “Optical ablation by high-power short-pulse lasers,” J. Opt. Soc. Am. B 13(2), 459–468 (1996).
    [Crossref]
  25. J. Meijer, “Laser beam machining (LBM), state of the art and new opportunities,” J. Mater. Process. Technol. 149(1–3), 2–17 (2004).
    [Crossref]
  26. D. von der Linde and K. Sokolowski-Tinten, “The physical mechanisms of short-pulse laser ablation,” Appl. Surf. Sci. 154–155, 1–10 (2000).
    [Crossref]
  27. C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
    [Crossref]
  28. D. Bauerle, Laser Processing and Chemistry (Springer Verlag, 1996).
  29. S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
    [Crossref]
  30. J. Piprek, “Efficiency droop in nitride-based light-emitting diodes,” Phys. Status Solidi., A Appl. Mater. Sci. 207(10), 2217–2225 (2010).
    [Crossref]
  31. Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
    [Crossref]

2014 (2)

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

2013 (3)

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

A. Mao and R. F. Karlicek., “Surface patterning of nonscattering phosphors for light extraction,” Opt. Lett. 38(15), 2796–2799 (2013).
[Crossref] [PubMed]

A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
[Crossref] [PubMed]

2012 (2)

H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express 20(9), 10218–10228 (2012).
[Crossref] [PubMed]

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

2011 (3)

H. K. Park, J. R. Oh, and Y. R. Do, “2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes,” Opt. Express 19(25), 25593–25601 (2011).
[Crossref] [PubMed]

C. C. Lin and R. S. Liu, “Advances in Phosphors for Light-emitting Diodes,” J. Phys. Chem. Lett. 2(11), 1268–1277 (2011).
[Crossref] [PubMed]

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

2010 (1)

J. Piprek, “Efficiency droop in nitride-based light-emitting diodes,” Phys. Status Solidi., A Appl. Mater. Sci. 207(10), 2217–2225 (2010).
[Crossref]

2009 (1)

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

2008 (1)

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

2007 (1)

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

2006 (2)

J. W. Kim and Y. J. Kim, “The effects of substrates and deposition parameters on the growing and luminescent properties of Y3Al5O12:Ce thin films,” Opt. Mater. 28(5), 698–702 (2006).
[Crossref]

J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[Crossref]

2005 (3)

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

2004 (1)

J. Meijer, “Laser beam machining (LBM), state of the art and new opportunities,” J. Mater. Process. Technol. 149(1–3), 2–17 (2004).
[Crossref]

2002 (1)

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

2000 (1)

D. von der Linde and K. Sokolowski-Tinten, “The physical mechanisms of short-pulse laser ablation,” Appl. Surf. Sci. 154–155, 1–10 (2000).
[Crossref]

1997 (1)

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

1996 (2)

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, and M. D. Perry, “Optical ablation by high-power short-pulse lasers,” J. Opt. Soc. Am. B 13(2), 459–468 (1996).
[Crossref]

1995 (2)

A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
[Crossref]

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

1993 (1)

G. S. Corman, “Creep of yttrium aluminium garnet single crystals,” J. Mater. Sci. Lett. 12(6), 379–382 (1993).
[Crossref]

1989 (1)

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Ahn, J.

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

Alvensleben, F. V.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Braunlich, P.

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Casper, R. T.

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Chen, Z.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

Chichkov, B. N.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Cho, J. Y.

J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[Crossref]

Cho, K.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

Choi, D. Y.

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

Corman, G. S.

G. S. Corman, “Creep of yttrium aluminium garnet single crystals,” J. Mater. Sci. Lett. 12(6), 379–382 (1993).
[Crossref]

Do, Y. R.

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express 20(9), 10218–10228 (2012).
[Crossref] [PubMed]

H. K. Park, J. R. Oh, and Y. R. Do, “2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes,” Opt. Express 19(25), 25593–25601 (2011).
[Crossref] [PubMed]

J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[Crossref]

Feit, M. D.

Feldman, R.

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

Freyssinier-Nova, J. P.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

Fujimoto, Y.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

Fujioka, K.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

Fujita, S.

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Furusato, I.

A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
[Crossref]

Golan, Y.

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

Gu, Y.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

Herman, S.

Holloway, P. H.

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

Huh, Y. D.

J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[Crossref]

Ikesue, A.

A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
[Crossref]

Isobe, T.

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

Iwasa, N.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

Jones, S. C.

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Jones, S. L.

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

Kamata, K.

A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
[Crossref]

Karlicek, R. F.

A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
[Crossref] [PubMed]

A. Mao and R. F. Karlicek., “Surface patterning of nonscattering phosphors for light extraction,” Opt. Lett. 38(15), 2796–2799 (2013).
[Crossref] [PubMed]

Kasuya, R.

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

Katano, J.

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

Kawano, A.

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

Kelly, P.

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Kim, J. K.

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

Kim, J. W.

J. W. Kim and Y. J. Kim, “The effects of substrates and deposition parameters on the growing and luminescent properties of Y3Al5O12:Ce thin films,” Opt. Mater. 28(5), 698–702 (2006).
[Crossref]

Kim, Y. J.

J. W. Kim and Y. J. Kim, “The effects of substrates and deposition parameters on the growing and luminescent properties of Y3Al5O12:Ce thin films,” Opt. Mater. 28(5), 698–702 (2006).
[Crossref]

Ko, K.

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

Kuma, H.

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

Kumar, D.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

Lebiush, E.

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

Leising, G.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Li, C.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

Lin, C. C.

C. C. Lin and R. S. Liu, “Advances in Phosphors for Light-emitting Diodes,” J. Phys. Chem. Lett. 2(11), 1268–1277 (2011).
[Crossref] [PubMed]

Liu, R. S.

C. C. Lin and R. S. Liu, “Advances in Phosphors for Light-emitting Diodes,” J. Phys. Chem. Lett. 2(11), 1268–1277 (2011).
[Crossref] [PubMed]

Liu, Z. Y.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

Mao, A.

A. Mao and R. F. Karlicek., “Surface patterning of nonscattering phosphors for light extraction,” Opt. Lett. 38(15), 2796–2799 (2013).
[Crossref] [PubMed]

A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
[Crossref] [PubMed]

Meijer, J.

J. Meijer, “Laser beam machining (LBM), state of the art and new opportunities,” J. Mater. Process. Technol. 149(1–3), 2–17 (2004).
[Crossref]

Momma, C.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Nagahama, S.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

Nakamura, S.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

Narendran, N.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

Nishiura, S.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

Niu, H. B.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

Nolte, S.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Oh, J. H.

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express 20(9), 10218–10228 (2012).
[Crossref] [PubMed]

Oh, J. R.

Ollinger, M.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

Pachler, P.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Park, H. K.

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

H. K. Park, J. H. Oh, and Y. R. Do, “Toward scatter-free phosphors in white phosphor-converted light-emitting diodes,” Opt. Express 20(9), 10218–10228 (2012).
[Crossref] [PubMed]

H. K. Park, J. R. Oh, and Y. R. Do, “2D SiNx photonic crystal coated Y3Al5O12:Ce3+ ceramic plate phosphor for high-power white light-emitting diodes,” Opt. Express 19(25), 25593–25601 (2011).
[Crossref] [PubMed]

Perry, M. D.

Piprek, J.

J. Piprek, “Efficiency droop in nitride-based light-emitting diodes,” Phys. Status Solidi., A Appl. Mater. Sci. 207(10), 2217–2225 (2010).
[Crossref]

Rubenchik, A. M.

Sakamoto, A.

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Schaper, C. D.

A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
[Crossref] [PubMed]

Schubert, E. F.

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

Schweighart, M.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Senoh, M.

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

Shen, X. A.

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Shimony, Y.

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

Shore, B. W.

Singh, R. K.

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

Sokolowski-Tinten, K.

D. von der Linde and K. Sokolowski-Tinten, “The physical mechanisms of short-pulse laser ablation,” Appl. Surf. Sci. 154–155, 1–10 (2000).
[Crossref]

Sommer, C.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Stuart, B. C.

Tanabe, S.

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Tasch, S.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Tünnermann, A.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

von der Linde, D.

D. von der Linde and K. Sokolowski-Tinten, “The physical mechanisms of short-pulse laser ablation,” Appl. Surf. Sci. 154–155, 1–10 (2000).
[Crossref]

Wang, Y. H.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

Wellegehausen, B.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Welling, H.

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Wenzl, F. P.

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Yamamoto, S.

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Yoon, S. W.

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

Yoshihara, S.

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Yu, B. H.

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

Zhu, Y.

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

Appl. Phys. Lett. (4)

S. Nakamura, M. Senoh, N. Iwasa, and S. Nagahama, “High-power InGaN single-quantum-well-structure blue and violet light-emitting diodes,” Appl. Phys. Lett. 67(13), 1868–1870 (1995).
[Crossref]

R. Kasuya, A. Kawano, T. Isobe, H. Kuma, and J. Katano, “Characteristic optical properties of transparent color conversion film prepared from YAG:Ce3+ nanoparticles,” Appl. Phys. Lett. 91(11), 111916 (2007).
[Crossref]

S. L. Jones, D. Kumar, R. K. Singh, and P. H. Holloway, “Luminescence of pulsed laser deposited Eu doped yttrium oxide films,” Appl. Phys. Lett. 71(3), 404–406 (1997).
[Crossref]

J. Y. Cho, Y. R. Do, and Y. D. Huh, “Analysis of the factors governing the enhanced photoluminescence brightness of Li-doped Y2O3:Eu thin-film phosphors,” Appl. Phys. Lett. 89(13), 131915 (2006).
[Crossref]

Appl. Surf. Sci. (2)

R. K. Singh, Z. Chen, D. Kumar, K. Cho, and M. Ollinger, “Critical issues in enhancing brightness in thin film phosphors for flat-panel display applications,” Appl. Surf. Sci. 197–198, 321–324 (2002).
[Crossref]

D. von der Linde and K. Sokolowski-Tinten, “The physical mechanisms of short-pulse laser ablation,” Appl. Surf. Sci. 154–155, 1–10 (2000).
[Crossref]

IEEE Photonics J. (1)

S. W. Yoon, H. K. Park, J. H. Oh, and Y. R. Do, “Full extraction of 2D photonic crystal assisted Y3Al5O12:Ce ceramic plate phosphor for highly efficient white LEDs,” IEEE Photonics J. 6(1), 1732–1738 (2014).
[Crossref]

J. Am. Ceram. Soc. (1)

A. Ikesue, I. Furusato, and K. Kamata, “Fabrication of polycrystalline, transparent YAG ceramics by a solid-state reaction method,” J. Am. Ceram. Soc. 78(1), 225–228 (1995).
[Crossref]

J. Disp. Technol. (1)

Z. Y. Liu, C. Li, B. H. Yu, Y. H. Wang, and H. B. Niu, “Effects of YAG:Ce phosphor particle size on luminous flux and angular color uniformity of phosphor-converted white LEDs,” J. Disp. Technol. 8(6), 329–335 (2012).
[Crossref]

J. Mater. Chem. C Mater. Opt. Electron. Devices (2)

S. W. Yoon, H. K. Park, K. Ko, J. Ahn, and Y. R. Do, “Various nanofabrication approaches towards two-dimensional photonic crystals for ceramic plate phosphor-capped white light-emitting diodes,” J. Mater. Chem. C Mater. Opt. Electron. Devices 2(36), 7513–7522 (2014).
[Crossref]

H. K. Park, S. W. Yoon, D. Y. Choi, and Y. R. Do, “Fabrication of wafer-scale TiO2 nanobowl arrays via a scooping transfer of polystyrene nanospheres and atomic layer deposition for their application to photonic crystals,” J. Mater. Chem. C Mater. Opt. Electron. Devices 1(9), 1732–1738 (2013).
[Crossref]

J. Mater. Process. Technol. (1)

J. Meijer, “Laser beam machining (LBM), state of the art and new opportunities,” J. Mater. Process. Technol. 149(1–3), 2–17 (2004).
[Crossref]

J. Mater. Sci. Lett. (1)

G. S. Corman, “Creep of yttrium aluminium garnet single crystals,” J. Mater. Sci. Lett. 12(6), 379–382 (1993).
[Crossref]

J. Opt. Soc. Am. B (1)

J. Phys. Chem. Lett. (1)

C. C. Lin and R. S. Liu, “Advances in Phosphors for Light-emitting Diodes,” J. Phys. Chem. Lett. 2(11), 1268–1277 (2011).
[Crossref] [PubMed]

J. Phys. Chem. Solids (1)

R. Feldman, Y. Shimony, E. Lebiush, and Y. Golan, “Effect of hot acid etching on the mechanical strength of ground YAG laser elements,” J. Phys. Chem. Solids 69(4), 839–846 (2008).
[Crossref]

Nanotechnology (1)

A. Mao, C. D. Schaper, and R. F. Karlicek., “Nanopatterning using a simple bi-layer lift-off process for the fabrication of a photonic crystal nanostructure,” Nanotechnology 24(8), 085302 (2013).
[Crossref] [PubMed]

Opt. Commun. (1)

C. Momma, B. N. Chichkov, S. Nolte, F. V. Alvensleben, A. Tünnermann, H. Welling, and B. Wellegehausen, “Short-pulse laser ablation of solid targets,” Opt. Commun. 129(1–2), 134–142 (1996).
[Crossref]

Opt. Eng. (1)

S. C. Jones, P. Braunlich, R. T. Casper, X. A. Shen, and P. Kelly, “Recent progress on laser-induced modifications and intrinsic bulk damage of wide-gap optical materials,” Opt. Eng. 28(10), 1039–1068 (1989).
[Crossref]

Opt. Express (2)

Opt. Lett. (1)

Opt. Mater. (2)

S. Nishiura, S. Tanabe, K. Fujioka, and Y. Fujimoto, “Properties of transparent Ce:YAG ceramic phosphors for white LED,” Opt. Mater. 33(5), 688–691 (2011).
[Crossref]

J. W. Kim and Y. J. Kim, “The effects of substrates and deposition parameters on the growing and luminescent properties of Y3Al5O12:Ce thin films,” Opt. Mater. 28(5), 698–702 (2006).
[Crossref]

Opt. Mater. Lett. (1)

C. Sommer, P. Pachler, M. Schweighart, S. Tasch, G. Leising, and F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. Lett. 31(6), 837–848 (2009).
[Crossref]

Phys. Status Solidi., A Appl. Mater. Sci. (2)

N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi., A Appl. Mater. Sci. 202(6), R60–R62 (2005).
[Crossref]

J. Piprek, “Efficiency droop in nitride-based light-emitting diodes,” Phys. Status Solidi., A Appl. Mater. Sci. 207(10), 2217–2225 (2010).
[Crossref]

Proc. SPIE (1)

S. Fujita, S. Yoshihara, A. Sakamoto, S. Yamamoto, and S. Tanabe, “YAG glass-ceramic phosphor for white LED (I): background and development,” Proc. SPIE 5941, 594111 (2005).
[Crossref]

Science (1)

E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005).
[Crossref] [PubMed]

Other (2)

C. F. Bohren and D. R. Huffman, Absorption and Scattering of Light by Small Particles (Wiley, 1983), Chap. 5.

D. Bauerle, Laser Processing and Chemistry (Springer Verlag, 1996).

Cited By

OSA participates in Crossref's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (9)

Fig. 1
Fig. 1 (a) Schematic diagram of the fabrication of microwells array on YAG:Ce CPP by laser direct patterning method. Schematic diagrams of the (b) forward emission and (c) total emission measurement methods.
Fig. 2
Fig. 2 (a) Appearance of unpatterned YAG:Ce CPP with smooth surface and microwell-patterned YAG:Ce CPP. (b) Optical microscopy of the fabricated microwells array patterned on the YAG:Ce CPP surface.
Fig. 3
Fig. 3 (a) Top-view and (b) 45° titled-view SEM images of the fabricated microwells array patterned on the YAG:Ce CPP surface at laser power of 0.03 W. Inset shows a single microwell. (c) A three-dimensional AFM image and (d) depth profile of the fabricated microwells array pattern.
Fig. 4
Fig. 4 Measured SPDs of (a) forward emission and (b) total emission and (c) total emission photons number enhancement, color conversion efficiency and the ratio of the forward emission photons number to the total emission photons number for all the samples at an injection current of 350 mA.
Fig. 5
Fig. 5 Measured (a) luminous efficacy (lm/W) and CCT and (b) CIE chromaticity coordinate distributions for the unpatterned and patterned YAG:Ce CPPs with different aspect ratios by integrating sphere at an injection current of 350 mA (insert shows the magnified chromaticity coordinates).
Fig. 6
Fig. 6 Variation of (a) Luminous efficacy (lm/W) and lumen flux and (b) CCT for the unpatterned and patterned YAG:Ce CPPs with different aspect ratios driven at current range from 10 mA to 700 mA.
Fig. 7
Fig. 7 (a) Far-field emission patterns and (b) the divergent angles for the unpatterned and patterned YAG:Ce CPPs with different aspect ratios at an injection current of 50 mA. The far-field emission intensity unit is candela.
Fig. 8
Fig. 8 Variations of (a) CCT (insert shows ACU of all the samples) and (b) CIE chromaticity coordinates as a function of the viewing angle for the unpatterned and patterned YAG:Ce CPPs with different aspect ratios at an injection current of 350 mA. (c) Illumination patterns for the unpatterned and patterned YAG:Ce CPPs.
Fig. 9
Fig. 9 Angle dependence of the relative sum of (a) blue photons and (b) yellow photons emission for the unpatterned and patterned YAG:Ce CPPs with different aspect ratios at an injection current of 350 mA.

Tables (2)

Tables Icon

Table 1 Fabrication parameters and geometric parameters of the fabricated microwells array patterns

Tables Icon

Table 2 CCT and CIE chromaticity coordinate variations of samples at the driven current range of 10 mA-700 mA

Equations (1)

Equations on this page are rendered with MathJax. Learn more.

ACU=1 1 n α=j α=k ( T α T avg ) 2 T avg

Metrics