Abstract

The electron affinities of several desensitizing dyes have been measured and found to lie in the neighborhood of 3.5 ev, and it seems unlikely that the dye can compete with sensitivity specks for electrons at equilibrium. The dyes produced a desensitization of photoconductivity in cadmium sulfide films, indicating that they can serve as surface electron traps. A mechanism of desensitization is suggested according to which the photoelectrons are loosely bound by one or several dye molecules seriatim, in consequence of which their times of arrival at the sensitivity speck are spread out over a long enough period so that the factors which contribute to the instability of the latent image become effective, and the sensitivity is thereby reduced.

© 1958 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Energy Transfers between Sensitizer and Substrate. IV. Energy Levels in Solid Dyes*

R. C. Nelson
J. Opt. Soc. Am. 51(11) 1186-1191 (1961)

Contact Potential Difference between Sensitizing Dye and Substrate*

R. C. Nelson
J. Opt. Soc. Am. 46(12) 1016-1019 (1956)

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