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Electrophotosensitive material

  • US 5,629,117 A
  • Filed: 10/12/1995
  • Issued: 05/13/1997
  • Est. Priority Date: 10/21/1994
  • Status: Expired due to Term
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Assignment
First Claim
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1. A single layer photosensitive material comprising a conductive substrate and an organic photosensitive layer provided on the conductive substrate, the organic photosensitive layer comprising a binding resin, an electron transferring material, an electric charge generating material and a hole transferring material,wherein the binding resin comprises at least one member selected from the group consisting of a polycarbonate of a repeating unit represented by the formula (1):

  • ##STR27## wherein RA and RB are the same or different and indicate a hydrogen atom or an alkyl group having 1 to 3 carbon atoms;

    RC and RD are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and

    RE and RF are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, a polycarbonate of a repeating unit represented by the formula (2);

    ##STR28## wherein RG and RH are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and

    RI and RJ are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, a polycarbonate of a repeating unit represented by the formula (3);

    ##STR29## and a polycarbonate as a random copolymer or a block copolymer of a repeating unit represented by the formula (4);

    ##STR30## wherein RK and RL are the same or different and indicate a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and RK and RL may bond each other to form a ring;

    RM and RN are the same or different and indicate an alkyl group having 1 to 3 carbon atoms; and

    RO and RP are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom and formula (5);

    ##STR31## wherein RQ and RR are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an aryl group which may have a substituent, and RQ and RR may bond each other to form a ring; and

    RS, RT, RU, RV, RW, RX, RY and RZ are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a halogen atom, the electron transferring material is selected from the group consisting of the diphenoquinone derivative represented by the formula (6);

    ##STR32## wherein R37, R38, R39 and R40 are the same or different and indicate a hydrogen atom, an alkyl group, an alkoxy group, an aryl group or an aralkyl group,the hole transferring material is at least one member selected from the group consisting of a benzidine derivative represented by the formula (7);

    ##STR33## wherein R1 and R2 are the same or different and indicate a hydrogen atom or an alkyl group;

    R3, R4, R5 and R6 are the same or different and indicate an alkyl group, an alkoxy group or a halogen atom; and

    a, b, c and d are the same or different and indicate an integer of 0 to 5;

    provided that at least one of a, b, c and d indicates an integer of 2 or more, and c and d indicate an integer other than 0 when a and b indicate 0, simultaneously, a benzidine derivative represented by the formula (8);

    ##STR34## wherein R7 and R8 are the same or different and indicate a hydrogen atom or an alkyl group;

    R9 and R10 are the same or different and indicate an alkyl group, an alkoxy group, an aryl group which may contain a substituent, or a halogen atom;

    R11 and R12 are the same or different and indicate an alkyl group, an alkoxy group or a halogen atom; and

    e, f, g and h are the same or different and indicate an integer of 0 to 5, a benzidine derivative represented by the formula (9);

    ##STR35## wherein R13, R14, R15 and R16 are the same or different and indicate an alkyl group; and

    R17, R18, R19 and R20 are the same or different and indicate a hydrogen atom, an alkyl group, an alkoxy group, an aryl group which may contain a substituent, or a halogen atom, a benzidine derivative represented by the formula (10);

    ##STR36## wherein R21 R22 R23 and R24 are the same or different and indicate an alkyl group, and R25, R26, R27 and R28 are the same or different and indicate a hydrogen atom, an alkyl group, an alkoxy group, an aryl group which may contain a substituent, or a halogen atom, an o-phenylenediamine derivative represented by the formula (11);

    ##STR37## wherein R29, R30, R31 and R32 are the same or different and indicate an alkyl group, an alkoxy group, an aryl group which may contain a substituent, or a halogen atom; and

    q, r, s and t are the same or different and indicate an integer of 1 to 2, and a m-phenylenediamine derivative represented by the formula (12);

    ##STR38## wherein R33, R34, R35 and R36 are the same or different and indicate an alkyl group, an alkoxy group, an aryl group which may contain a substituent, a halogen atom, an amino group or a N-substituted amino group; and

    u, v, w and x are the same or different and indicate an integer of 0 to 5.

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