TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Solar Cells: (disclosed) The dyes are normally used on substrate with rutile structure, e.g. zirconium, vanadium, niobium, chromium, molybdenum, tungsten, manganese, ruthenium, osmium, iridium, germanium, tin, lead and tellurium dioxides; manganese, iron, cobalt, nickel, palladium, zinc and magnesium difluoride; or substrates with anatase structure. SPECIFIC COMPOUNDS - The specified dyes are Coumarin 6 (7-diethylamino-3-(benzothiazol-2-yl)-coumarin); Coumarin 7 (7-diethylamino-3-(benzimidazol-2-yl)-coumarin); Coumarin 30 (7-diethylamino-3-(1-methyl-benzimidazol-2-yl)-coumarin), Coumarin 47 (7-diethylamino-4-methylcoumarin); Coumarin 151 (7-amino-4-trifluoromethylcoumarin), Coumarin 152A (7-diethylamino-4-trifluoromethylcoumarin), Coumarin 466 (7-diethylamino-coumarin), Coumarin 500 (7-ethylamino-4-trifluoromethylcoumarin), Coumarin 522 (9-methyl-4-trifluoromethyl-pyrano(3,2-g)quinolin-2-one); uranine (disodium salt); Fluorol 7GA (6-n-butylamino-1-n-butyl-benz(de)isoquinolin-1,3-dione); Pyridine 1 (2-(4-(4-dimethylaminophenyl)butadienyl-1-ethylpyridinium perchlorate); DCM (4-dicyanomethylene-2-methyl-5-(4-dimethylaminostyryl)pyran); bis-MSB (1,4-bis(2-methylstyryl)benzene); POPOP (1,4-bis(5-phenyloxazol-2-yl)benzene); TBS (3,3',5,5'-tetra-tert.-butylsexiphenyl); alpha-NPO (2-alpha-naphthyl-5-phenyl-oxazole), furan 2 (tetrasulfo-(2-diphenyl-4-yl)-7-phenylbenzoxazole, tetrapotassium salt), PBBO (2-diphenylyl-6-phenyl-benzoxazole), DPS (4,4'-diphenylstilbene), Stilbene 1 (4,4'-bis(p-potassium sulfophenyl)stilbene); Styryl 7-((2-(4-(4-dimethylaminophenyl)-1,3-butadienyl)-3-ethylbenzothiazolium p-toluenesulfonate)); Styryl 9M; ((3-(2-(4-(dimethylamino)phenyl)ethenyl)-5,5-dimethyl-2-cyclohexen-1-ylidene)methyl)-3-methylbenzothiazolium perchlorate, 5-phenyl-2-(4-pyridyl)oxazole; Oxazine 170 perchlorate (5,9-di(ethylamino)-10-methyl-benzo(a)phenoxazine perchlorate); 1,1',3,3,3',3'-hexamethylindodicarbocyanine iodide; N,N'-ditridecyl-3,4,9,10-perylenetetracarbodiimide.