TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Layer: In the electrode layer, the oxide semiconductor fine particles are made of titanium dioxide (TiO2), tin dioxide (SnO2), tungsten oxide (WO3), zinc oxide (ZnO), niobium pentoxide (Nb2O5), iron oxide (Fe2O3), zirconium dioxide (ZrO2), magnesium oxide (MgO), cadmium sulfide (CdS), zinc sulfide (ZnS), lead sulfide (PbS), bismuth sulfide (Bi2S3), cadmium selenide (CdSe), cadmium telluride (CdTe) or combinations. The porous film made of oxide semiconductor fine particles is sensitized with a dye of Formula (I) and one or more further dyes selected from metal complex dyes and organic dyes, preferably selected from indoline, coumarin, cyanine, merocyanine, hemicyanine, methin, azo, quione, quinonimine, diketo-pyrrolo-pyrrole, quinacridone, squaraine, triphenylmethane, perylene, indigo, xanthene, eosin, rhodamine and combinations. The dye is adsorbed together with one or more additives selected from adsorbents, steroids, crown ethers, cyclodextrines, calixarenes, polyethyleneoxides, hydroxamic acids, hydroxamic acid salts and combinations. Full Definitions:    asterisk-=the bond to the remaining compound of Formula (I); R17and R18=unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C-aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl, unsubstituted or substituted 4-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations, or R17 and R18 form together with the nitrogen atom to which they are attached an unsubstituted or substituted 5-, 6- or 7-membered ring, or R17 and R20 form together with the nitrogen atom to which R17 is attached and the carbon atoms of the benzene ring to which R20 and N-R17 are attached an unsubstituted or substituted 5-, 6- or 7-membered ring; or R17 and R22 form together with the nitrogen atom to which R17 is attached and the carbon atoms of the benzene ring to which R22 and N-R17 are attached an unsubstituted or substituted 5-, 6- or 7-membered ring; and/or R18 and R19 form with the nitrogen atom to which R18 is attached and the carbon atoms of the benzene ring to which R19 and N-R18 are attached an unsubstituted or substituted 5-, 6- or 7-membered ring;    R14=hydrogen, 1-20C-alkyl;    R15, R16, R19, R20, R21, R22, R23 and R24=hydrogen, NR25R26, OR25, SR25, NR25-NR26R27, NR25-OR26, O-CO-R25, O-CO-OR25, O-CO-NR25R26, NR25-CO-R26, NR25-CO-OR26, NR25-CO-NR26R27, CO-R25, CO-OR25, CO-NR25R26, S-CO-R25, CO-SR25, CO-NR25-NR26R27, CO-NR25-OR26, CO-O-CO-R25, CO-O-CO-OR25, CO-O-CO-N R25R26, CO-NR25-CO-R26, CO-NR25-CO-OR26, unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C-aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl, unsubstituted or substituted 4-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations; and    R25, R26 and R27=hydrogen, unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C-aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl, unsubstituted or substituted 4-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations.    asterisk-=the bond to the remaining compound of Formula (I);    R29=a residue G, hydrogen, halogen, OR, unsubstituted or substituted 2-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C-aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl, unsubstituted or substituted 5-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations;    R30, R31, R32 and R33=independently of each other selected from a residue G, hydrogen, halogen, OR36, NO2, CN, COR', COOR', SO2R' and SO3R', unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C- aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted heterocyclyl, unsubstituted or substituted 5-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations;    R'=unsubstituted aryl, substituted aryl, unsubstituted alkyl having 1-10 carbon atoms, substituted alkyl having 1-10 carbon atoms including substituents, unsubstituted cycloalkyl having 5-7 carbon atoms, and substituted cycloalkyl having 5-10 carbon atoms including substituents, where in the alkyl or cycloalkyl groups one oxygen atom or two nonadjacent oxygen atoms may be inserted between respective C atoms; where optionally in (A.7) R30 and R31 together with the carbon atoms to which they are attached or R32 and R33 together with the carbon atoms to which they are attached form an unsubstituted or substituted 5-, 6- or 7-membered ring; with the proviso that at least one of the residues R29 R30, R31, R32, R33, R34 and R35 is a residue G;    R36=unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, where alkyl is uninterrupted or interrupted by O, S, CO, NR14 or combinations;    Q=-S-, -C(R34)(R35)-, -O-;    R34 and R35=a residue G, hydrogen, halogen, OR36, unsubstituted or substituted 1-20C-alkyl, unsubstituted or substituted 2-20C-alkenyl, unsubstituted or substituted 2-20C-alkynyl, unsubstituted or substituted 7-20C-aralkyl, unsubstituted or substituted 8-20C-aralkenyl, unsubstituted or substituted 8-20C-aralkynyl, unsubstituted or substituted 6-20C-aryl, unsubstituted or substituted heteroaryl, unsubstituted or substituted hetero-cyclyl, unsubstituted or substituted 5-20C-cycloalkyl, unsubstituted or substituted 5-20C-cycloalkenyl and unsubstituted or substituted 6-20C-cycloalkynyl, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are uninterrupted or interrupted by O, S, CO, NR14 or combinations;    G=-R28-COOH, -R28-COO-Z+, -R28-CO(C=O)OH, -R28-CO(C=O)O-Z+, -R28-S(=O)2OH, -R28-S(=O)2O-Z+, -R28-O-S(=O)2OH, -R28-O-S(=O)2O-Z+, -R28-P(=O)(OH)2, -R28-P(=O)(O-Z+)2, -R28-P(=O)(OH)(O-Z+), -R28-O-P(=O)(OH)2, -R28-0-P(=O)(O-Z+)2, -R28-0-P(=O)(OH)(O-Z+), -R28-CO-NH-OH, -R28-S(=O)2NH-OH, -R28-NR14-S(=O)2OH and -R28-NR14-S(=O)2O-Z+ ;    R28=a direct bond, 1-20C-alkylene, 2-24C-alkenylene or 6-10C-arylene;    Z+=an organic or inorganic cation equivalent; and    Y-=an anion capable of absorbing electromagnetic radiation having a wavelength in the range of 400-1000 nm.    Y-=an anion providing a conjugated pi-electron system; or a metal complex anion, preferably selected from Ru, Pt, Ir, Rh, Re, Os, Fe, W, Cr, Mo, Ni, Co, Mn, Zn, Cu and combinations, more preferably selected from Ru, Os, Fe and combinations, most preferably the metal complex anion is Ru; or an anion comprising a moiety selected from -SO3-, -COO-, -O-S(=O)2O-, -P(=O)(OH)(O-), -P(=O)(OH)(O-) and -SCN; or an anion of Formula (II): A1-A2-E-; or an anion of Formula (III).    A1=a group providing a conjugated pi-electron system;    A2=an unsubstituted alkyl chain having 1-24 carbon atoms or a substituted alkyl chain having 1-24 carbon atoms including substituents, where in the alkyl or substituted alkyl chain optionally one or more functional groups, in particular one or more ester groups, are located between respective C atoms; and    E-=a moiety selected from -SO3-, -COO-, -O-S(=O)2O-, -P(=O)(OH)(O-) and -P(=O)(OH)(O-).    x, y=0 and 1;    z=0, 1, 2, 3, 4, 5, 6, 7, 8 and 9;    R2=H, NO2, CN, COR', COOR', SO2R' and SO3R';    R'=unsubstituted aryl, substituted aryl, unsubstituted alkyl having 1-10 carbon atoms, substituted alkyl having 1-10 carbon atoms including substituents, unsubstituted cycloalkyl having 5-7 carbon atoms, and substituted cyclo-alkyl having 5-10 carbon atoms including substituents, where in the alkyl or cycloalkyl groups one oxygen atom or two nonadjacent oxygen atoms may be inserted between respective C atoms; and    R3, R4=H, F, Cl, Br and I.    EXAMPLE - No suitable example given.