Abstract

A new blue-emitting phosphor, K2ScSi4O10F:Eu2+ (KSSOF:Eu2+), was synthesized through a solid-state reaction. The structural and optical properties of KSSOF:Eu2+ phosphor, in addition to its thermal quenching and fabrication of white LEDs (WLEDs), were investigated for the first time. The phosphor showed broad blue emission, with a maximum at 434nm under near-ultraviolet excitation due to 5d4f transition of the Eu2+ ion. The critical distance was calculated to be 12 Å using the critical concentration of Eu2+ and Dexter’s theory for energy transfer. WLEDs were fabricated by blending KSSOF:Eu2+, commercial Lu3Al5O12:Ce3+, and (Sr,Ca)AlSiN3:Eu2+ phosphors, showed a high color rendering index of 88 at a correlated color temperature of 4134 K under a forward bias current of 100 mA.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High-efficiency cubic-phased blue-emitting Ba3Lu2B6O15:Ce3+ phosphors for ultraviolet-excited white-light-emitting diodes

Bin Li, G. Annadurai, Liangling Sun, Jia Liang, Shaoying Wang, Qi Sun, and Xiaoyong Huang
Opt. Lett. 43(20) 5138-5141 (2018)

Optical characteristics and longevity of quantum dot-coated white LED

Ji Wook Moon, Jin Sung Kim, Bong Gul Min, Hyun Min Kim, and Jae Soo Yoo
Opt. Mater. Express 4(10) 2174-2181 (2014)

Eu2+-activated silicon-oxynitride Ca3Si2O4N2: a green-emitting phosphor for white LEDs

Yi-Chen Chiu, Chien-Hao Huang, Te-Ju Lee, Wei-Ren Liu, Yao-Tsung Yeh, Shyue-Ming Jang, and Ru-Shi Liu
Opt. Express 19(S3) A331-A339 (2011)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription