Charge injection barrier for positive charging organic photocond

Details Charge injection barrier for positive charging organic photocond Charge injection barrier for positive charging organic photocond

1995-11-01

1996-09-17

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 67, 430 83, 430 58, 430 59, G03G 509, G03G 5147

Patent

active

055567304

ABSTRACT:
In organic photoconductors (OPC's) for electrophotography, a barrier layer is placed on top of the OPC. The barrier may have 2 layers--1, an electron withdrawing layer on top of the OPC; and,--2, an electron donating layer on top of the electron withdrawing layer. The barrier layer comprises: 1. a crosslinked polymer binder; 2. a charge injection prohibiter molecule, and optionally; 3. an electron withdrawing molecule. This formulation has resulted in a long-life OPC with more than 50,000 good cycles at high severity test conditions. The OPC had not only long life during continuous use, but also long shelf life and long on-again/off-again operation life.

REFERENCES:
patent: 4923775 (1990-05-01), Schank
patent: 4943501 (1990-07-01), Kinoshita et al.
patent: 5069993 (1991-12-01), Robinette et al.
patent: 5096793 (1992-03-01), Osawa et al.

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