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

1994-01-12

1995-12-19

Klemanski, Helene

Compositions

Barrier layer device compositions

Group iii element containing binary compound; e.g., ga, as

252 623T, G03G 510

Patent

active

054766044

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: 3953874 (1976-04-01), Aviram et al.
patent: 4923774 (1990-05-01), Van der Auweraer et al.
patent: 4988597 (1991-01-01), Spiewak et al.

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