NOVELTY - A solar cell device has conductive substrate, electron injection layer formed on upper portion of cathode, and doped active layer formed between the conductive substrate and electron injection layer. The doped active layer contains poly(3-hexylthiophene)-(6,6)-phenyl-61C butyric acid methyl ester, poly(3-alkylthiophene)-(6,6)-phenyl-61C butyric acid methyl ester, poly(2-methoxy-5-(3'-7'-dimethyloctyloxy)-1,4-phenylenevinylene)-(6,6)-phenyl-61C butyric acid methyl ester and poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene)-(6,6)-phenyl-61C butyric acid methyl ester.    USE - Solar cell device.    ADVANTAGE - The solar cell device has excellent photocurrent density and light absorbing efficiency.    DETAILED DESCRIPTION - A solar cell device has conductive substrate, electron injection layer formed on upper portion of cathode, and doped active layer formed between the conductive substrate and electron injection layer. The doped active layer contains poly(3-hexylthiophene)-(6,6)-phenyl-61C butyric acid methyl ester, poly(3-alkylthiophene)-(6,6)-phenyl-61C butyric acid methyl ester, poly(2-methoxy-5-(3'-7'-dimethyloctyloxy)-1,4-phenylenevinylene)-(6,6)-phenyl-61C butyric acid methyl ester, poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene)-(6,6)-phenyl-61C butyric acid methyl ester and/or small molecule doped with phthalocyanine dye. An INDEPENDENT CLAIM is included for preparation of solar cell device. A conductive substrate is provided. The donor materials chosen from poly(3-hexylthiophene)-(6,6)-Phenyl-61C butyric acid methyl ester, poly(3-alkylthiophene)-(6,6)-Phenyl-61C butyric acid methyl ester, poly(2-methoxy-5-(3'-7'-dimethyloctyloxy)-1,4-phenylenevinylene)-(6,6)-Phenyl-61C butyric acid methyl ester and poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene)-(6,6)-Phenyl-61C butyric acid methyl ester, are mixed in the solvent to prepare 10-24 mg/ml of solution. The solution is stirred for 12-24 hours, and the small molecule doped with phthalocyanine dye is added to form 1-3 mg/ml of doped active solution. A doped active layer is formed using the doped active solution and inserted between the formed electron injection layer and conductive substrate.