Electrophotographic organophotoreceptors with novel charge transport compounds
AssigneeSamsung Electronics Co., Ltd.
InventorsNusrallah Jubran, Hwan Koo Lee, Kam W. Law
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Abstract
Charge transport compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group. Examples of charge transport compounds of this invention are those having the following generic formula: (R-Q)n-Y where R is an (N,N-disubstituted)arylamine group; Q comprises an aromatic hydrazone linking group; Y comprises a bridging group between R-Q- groups; and n is an integer between 2 and 6. An organic photoreceptor includes (a) that compound and (b) a charge generating compound; and (c) an electrically conductive substrate.
Claims25
A charge transport compound having the following formula:
- (R-Q)n-Y
- where R is an (N,N-disubstituted)arylamine group;
- Q comprises an aromatic hydrazone linking group;
- Y comprises a bridging group between R-Q- groups where Y comprises a bond, nitrogen atom, oxygen atom, sulfur atom, a branched or linear —(CH)p— around where p is an inteaer between 1 and 10, a cycloalkyl group, or a cyclosiloxyl group;
- and
- n is an integer between 2 and 6.
An organic photoreceptor comprising:
- (a) a charge transport compound having the formula
- (R-Q)n-Y
- where R is an (N,N-disubstituted)arylamine group;
- Q comprises an aromatic hydrazone linking group;
- Y comprises a bridging group between R-Q- groups where Y comprises a bond, nitrogen atom, oxygen atom, sulfur atom, a branched or linear —(CH2)p— group where p is an integer between 1 and 10, a cycloalkyl group, or a cyclosiloxyl group;
- and n is an integer between 2 and 6;
- (b) a charge generating compound;
- and
- (c) an electrically conductive substrate on which the charge transport compound and the charge generating compound are located.
An electrophotographic imaging apparatus comprising:
- (a) a plurality of support rollers;
- and
- (b) an organic photoreceptor in the form of a flexible belt threaded around said support rollers, said organic photoreceptor comprising:
- (i) a charge transport compound having the formula
- (R-Q)n-Y
- where R is an (N,N-disubstituted)arylamine group;
- Q comprises an aromatic hydrazone linking group;
- Y comprises a bridging group between R-Q- groups where Y comprises a bond, nitrogen atom, oxygen atom, sulfur atom, a branched or linear —(CH2)p— group where p is an inteaer between 1 and 10, a cycloalkyl group, or a cyclosiloxyl group;
- and n is an integer between 2 and 6;
- (ii) a charge generating compound;
- and
- (iii) an electrically conductive substrate.
An electrophotographic imaging process comprising:
- (a) applying an electrical charge to a surface of an organic photoreceptor comprising:
- (i) a charge transport compound having the formula
- (R-Q)n-Y
- where R is an (N,N-disubstituted)arylamine group;
- Q comprises an aromatic hydrazone linking group;
- Y comprises a bridging group between R-Q- groups where Y comprises a bond, nitrogen atom, oxygen atom, sulfur atom, a branched or linear —(CH2)p— group where p is an integer between 0 and 10, a cycloalkyl group, or a cyclosiloxyl group;
- and
- n is an integer between 2 and 6;
- (ii) a charge generating compound;
- and
- (iii) an electrically conductive substrate;
- (b) imagewise exposing said surface of said organic photoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and uncharged areas on said surface;
- (c) contacting said surface with a toner comprising colorant particles;
- and
- (d) transferring said toned image to a substrate.
Dependencies are inferred from the claim text.