TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - The electron channel is coated on electron carrier (1) chosen from inorganic particles coated with composite of titanium oxide, zinc oxide, indium oxide, tin oxide, tungsten oxide, niobium oxide, molybdenum oxide, magnesium oxide, zirconium oxide, strontium oxide, lanthanum oxide, vanadium oxide, aluminum oxide, yttrium oxide, scandium oxide, samarium oxide, gallium oxide and strontium-titanium oxide. The inorganic semiconductor photoabsorbent (2) is chosen from cadmium sulfide, cadmium selenide, cadmium telluride, lead sulfide, lead selenide, lead telluride, bismuth sulfide, bismuth selenide, indium phosphide, indium arsenide, indium gallium arsenide, zinc selenide, zinc telluride, gallium nitride, gallium phosphide, gallium arsenide, gallium antimonide, indium antimonide, silicon, germanium, aluminum arsenide, aluminum antimonide, copper-indium disulfide, copper-gallium indium diselenide, antimony trisulfide, antimony selenide, antimony telluride, tin sulside, tin disulfide, nickel sulfide, cobalt sulfide, iron sulfide, iron disufide, indium sulfide, molybdenum sulfide, molybdenum selenide, copper sulfide, mercury telluride and magnesium selenide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The electron channel consists of 1-500 pts. wt. compound chosen from fullerene derivative, bisphthalocyaninato lutetium, bis-phthalocyaninato thulium, tetracyanoquinodimethane, 1,1'-thiocarbonyldiimidazole phenyl, tetracyanoquinodimethane, naphthalenetetracarboxylic diimide, 3,4,9,10-perylentetracarbonsuredianhydride, hexadecafluorophthalocyanine, NYCDI-C8F, DHF-6T, pentacene, N,N'-dioctyl-3,4,9,10-perylenedicarboximide, quinodimethane, BBL-type compound, ( alpha ),( omega )-perfluorohexyl-quaterthiophene, DFH-5T, DFH-6T and (6,6)-phenyl-61C-methyl butyrate with respect to 100 pts. wt. hole conductivity polymer.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The hole-conductive polymer is chosen from (poly(3-hexylthiophene)), (poly(2-methoxy-5-(3',7'- dimethyloctyloxyl))-1,4-phenylene vinylene), (poly(2-methoxy -5-(2''-ethylhexyloxy)-p-phenylene vinylene)), (poly(3-octyl thiophene)), (poly(p-phenylene vinylene)), (poly (9,9'-dioctylfluorene-co-N-(4-butylphenyl)diphenyl amine), (poly(octyl thiophene)), (poly(2,1,3-benzothiadiazole-4,7-diyl(4,4-bis(2-ethylhexyl)-4H-cyclopenta(2,1-b:3,4-b')dithiophene-2,6-diyl))), (poly((9-(1-octylnonyl)-9H-carbazole-2,7-diyl)-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl)), poly-(N-dodecyl-2,5-bis(2'-thienyl)pyrrole-(2,1,3-benzothiadiazole)), poly(4,4-dioctyldithieno(3,2-b:2',3'-d)silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl), P2-type polymer, poly(3,6-bis-(4'-dodecyl-(2,2')bithiophenyl-5-yl)-2,5-bis-(2-ethyl-hexyl)-2,5-dihydropyrrolo(3,4-)pyrrole-1,4-dione), PDPP-BPD2-type polymer, PFPDT-type polymer, poly((2,7-(9,9-bis-(2-ethylhexyl)-fluorene))-alt-(5,5-(4,7-di-2- thienyl-2,1,3-benzothiadiazole))), poly(2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl(9,9-dioctyl-9H-9-silafluorene-2,7-diyl)-2,5-thiophenediyl), alternating polyfluorene-15-type polymer, HXS-1-type polymer, polyfluorene-thieno(3,4-b) thiophene polymer, alternating polyfluorene-Green2-type polymer, PBEHTB-type polymer, PF-co-DTB-type polymer and PFO-SeBT-type polymer.