Hole photogeneration in dual layer aggregate photoreceptors

Marie B. O'Regan; Paul M. Borsenberger; Edward H. Magin; T. Zubil

doi:10.1117/12.217320

23 August 1995 Hole photogeneration in dual layer aggregate photoreceptors

Marie B. O'Regan, Paul M. Borsenberger, Edward H. Magin, T. Zubil

Proceedings Volume 2526, Xerographic Photoreceptors and Photorefractive Polymers; (1995) https://doi.org/10.1117/12.217320
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Photogeneration efficiencies have been measured in dual layer aggregate photoreceptors over a wide range of fields and wavelengths. The results are described by a surface-enhanced exciton dissociation model. The model is based on a theory of geminate recombination, originally due to Onsager. The Onsager theory is based on the assumption that the absorption of a photon creates a bound electron-hole pair which then either dissociates into a free electron and a free hole, or undergoes recombination. The key parameters of the theory are the fraction of absorbed photons that create bound pairs, and the electron-hole separation distance of the bound pair. For aggragate materials, the yield of creating the bound pairs is 0.60. The separation distances are between 20 and 60 angstrom. The high photogeneration efficiencies in these materials are attributed to both the high yield of creating the bound pairs and the low electron-hole recombination probability because of the large pair separation distances.

Citation Download Citation

Marie B. O'Regan, Paul M. Borsenberger, Edward H. Magin, and T. Zubil "Hole photogeneration in dual layer aggregate photoreceptors", Proc. SPIE 2526, Xerographic Photoreceptors and Photorefractive Polymers, (23 August 1995); https://doi.org/10.1117/12.217320

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