TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The organic hole transport compound is conjugated compound having two or more conjugated groups chosen from arylene group, bivalent aromatic heterocyclic group, ethenylene group, and ethynylene group, condensed polycyclic aromatic compound, phthalocyanine compound or compound having triphenylamine structure, or monomer, oligomer, prepolymer, polymer, compound having spiro structure or conjugated compound containing thiophene ring structure. The pigment (I) contains electronic acceptor and donor, and has donor acceptor-type molecule. The photoreceptor layer further has pigment of formula: ML 1m1L 2m2X' mx.Cl' or pigment of formula MzL 3m3L 4m4Y"' my.Cl'.M,Mz=metal atom;L 1=ligand of formula (xii);L 2=ligand of formula (xiii);X'=monodentate ligand;m1=1 or 2;m2=1 or 2;mx=0 or 1;Cl'=counter-ion for neutralizing electric charge;Za-Zc=atomic group which forms 5- or 6-membered ring, in which at least one has acidic group;rings A-C'=nitrogen-containing aromatic 5 or more membered ring;a=0 or 1;V=substituent having positive (sigma)p value based on Hammett rule;L 3=bidendate ligand of formula (xiv);L 4=bidendate ligand or tridendate ligand of formula (xv);Y"'=ligand of monodentate or bidentate;m3=0-3;m4=1-3;my=0-2;Ac=acidic group;Ra=substituent;Rb=alkyl or aromatic ring group;e1,e2=0-5;Lc,Ld=conjugated chain;e3=0 or 1;f,g=0-3;Zd,Ze,Zf=atomic group which can form 5- or 6-membered ring, in which at least one has acidic group;andh=0 or 1. Preferred Definitions:    P 1=thiazolidinone-type group of formula (i) or (ii), or bicyclic group of formula (iii) or (iv);    R 5,R 6,R 10,R 11=aliphatic group or aromatic ring group (both optionally having acidic group);    R 7,R 12=S or asterisk=C(-R 14)(-R 13);    R 3,R 4,R 8=H or substituent;    R 9=O or substituent;    n21=0 or more;    n22,n31=0 or 1;    R 13,R 14=cyano or acidic group;    V 1=H or substituent;    n=0-4;    m=1-4;    Y'=S, NR 39 or CR 40R 41;    R 39-R 41=H, aliphatic group, aryl or heterocyclyl group couple with C;    Z=aliphatic group, aryl, or heterocyclyl coupled with C;    R 33-R 36,R 38=H, aliphatic group, aryl or heterocyclyl;    R 37=substituent chosen from O and C, in which (sigma)p of total of substituents is positive based on Hammett rule;    P 2=Ar 1=(C(R 22)-(R 21)) n41=asterisk or group of formula (v);    Ar 1=pi-excess heterocyclyl or aromatic ring having substituent with sigma-p of 0 or less based on Hammett rule, preferably group of formula (vi)-(ix);    n41=0 or more;    Y"=S, NRe or C(Rf) 2;    Re,Rf=substituent;    A=aromatic ring;    R 21-R 23,R 26=H or substituent;    E=S, NRe or O;    D'=substituent having (sigma)p value of 0 or less based on Hammett rule;    B'=aromatic ring;    X=-SRe, -ORe, -N(Re) 2;    k=positive integer;and    L=group of formula (x) or (xi).