Efficient xerographic photoreceptors from conjugated polymers and polymer blends

Xuejun Zhang; Anita K. Alanko; Samson A. Jenekhe

doi:10.1117/12.290246

9 October 1997 Efficient xerographic photoreceptors from conjugated polymers and polymer blends

Xuejun Zhang, Anita K. Alanko, Samson A. Jenekhe

Proceedings Volume 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II; (1997) https://doi.org/10.1117/12.290246
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Bilayer xerographic photoreceptors in which (pi)-conjugated polymers and binary conjugated polymer blends are used as the charge generation layer have been fabricated, evaluated, and shown to be highly efficient. Devices incorporating poly(1,4-phenylene benzobisthiazole), poly(2,5-pyridylene benzobisthiazole), poly(l ,4-phenylenebisvinylene benzobisthiazole), poly(1 ,4-(2-hydroxy)phenylene benzobisthiazole), and poly(benzimidazobenzophenanthroline ladder) as the charge generation layer and a layer of tris(p-tolyl)amine (TTA) dispersed in polycarbonate as the charge-transport layer showed good photosensitivities (6-18 ergs/cm²), good dark decay characteristics (2-10 V/s at surface potentials of 400- 600 V), and high charge generation quantum efficiencies (20-50% at ~10⁶ V/cm). Photoreceptors using binary blends of conjugated polymers had enhanced spectral range of photosensitivity (300-700 nm) and significantly enhanced quantum yield for charge photogeneration relative to the component conjugated polymers. Photocarrier generation in these bilayer photoreceptors is extrinsic in nature and is mediated by exciplex formation between the conjugated polymer and TTA at the bilayer interface. Observed nanoscale size effects, in which the photoreceptor performance (quantum efficiency, photosensitivity) is enhanced with decreasing size of the charge generation layer, provide a means of tuning the photoconductive properties of optoelectronic devices based on conjugated polymers. A model derived from Onsager's 1934 theory was used to estimate the primary quantum yield of ion-pairs and ion-pair separation distance in the bilayer photoreceptors to be 0.21-0.62, and 4-6 angstroms, respectively.

Citation Download Citation

Xuejun Zhang, Anita K. Alanko, and Samson A. Jenekhe "Efficient xerographic photoreceptors from conjugated polymers and polymer blends", Proc. SPIE 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II, (9 October 1997); https://doi.org/10.1117/12.290246

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available