NOVELTY - Quinacridone borate derivative (I) is new.    USE - Quinacridone borate derivative (I) used as photoactive layer material for organic solar cell or charge transport layer material for organic field effect transistor (claimed).    ADVANTAGE - The quinacridone borate derivative (I) has high planarity, high solubility in common organic solvent, and high film-forming property, and can be processed into solution. It produces solar cell with high open-circuit voltage and energy conversion efficiency; and field effect transistor with high migration rate and air stability.    DETAILED DESCRIPTION - Quinacridone borate derivative of formula (I) is new.    R1=H, halo, 1-20C alkyl, halo substituted 1-20C alkyl, 1-20C halo substituted alkoxy, 1-20C sulfonic acid group, aryl sulfonic acid, halo substituted sulfonic group, 1-20C aromatic group, optionally substituted 1-20C fused heterocyclyl group, preferably 1-20C aryl or 1-20C alkyl optionally substituted with halo, 1-20C alkyl, or 1-20C alkoxy; and    R2=-CN, -COOH, -COOR', NH2, NO2, HCO- or -COR; and    R'=1-20C alkyl or NH2.    INDEPENDENT CLAIMS are included for:    (1) preparation of compound (I);    (2) quinacridone compound of formula (II);    (3) preparation of compound (II) by subjecting compound I and dipyrrole compound of formula (IIa) into Suzuki coupling reaction in the presence of catalyst and weak base under inert atmosphere to obtain compound (II);    (4) quinacridone compound of formula (III);    (5) preparation of compound (III) by compound (I), compound (IIIa), and phase transfer catalyst into Suzuki polymerization in the presence of catalyst and weak base aqueous solution under inert atmosphere; cooling; adding benzene boronic acid or 2-thiophene boronic acid; and performing Suzuki coupling reaction with bromobenzene or 2-bromo-thiophene to obtain compound (III); and    (6) use of quinacridone compounds (I)-(III) as polymer layer for organic solar cell or organic field effect transistor; for photoactive layer of organic solar cell or charge transport layer of organic field effect transistor; for organic solar cells and organic field effect transistor; or for optically active layer of organic field effect transistor, or charge transport layer polymeric compound organic solar cells.    Ar1, Ar'=one or more of 30 aryl groups, e.g. formulae (1)-(3);    R=R1;    X=S, O, or N;    m, n=0-5; and    n'=7-50.