TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The oxide semiconductor fine particles are made of TiO2, SnO2, WO3, ZnO, Nb2O5, Fe2O3, ZrO2, MgO, WO3, ZnO, CdS, ZnS, PbS, Bi2S3, CdSe, and/or CdTe. The porous film made of oxide semiconductor fine particles is sensitized with the dye of formula (I) and at least one further dye.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Preparation of the compound (I) (where n is 0) involves reacting substituted phenyl compound of formula (II) with a compound of formula R2-CH2-A'. Preferred Components: The further dye is a metal complex dye and/or an organic dye selected from indoline, courmarin, cyanine, merocyanine, hemicyanine, methine, azo, quinone, quinonimine, diketo-pyrrolo-pyrrole, quinacridone, squaraine, triphenylmethane, perylene, indigo, xanthene, eosin, and/or rhodamine. The dye is adsorbed together with an additive. The additive is a co-adsorbent selected from steroid, sulfonate, carboxylic acid, phosphinic acid, crown ether, cyclodextrine, calixarene, and/or polyethyleneoxide. Full Definitions:    m=0 or 1;    n=0-5;    R1=T2 or D';    R2 to R4=T2;or    R1+R2, or R3+R4=optionally substituted aliphatic 5-, 6- or 7-membered ring;    T2=H, -S(=O)2OR7, -S(=O)2R7, -S(=O)R7, -S(=O)OR7, fluorinated 1-8C alkyl, -C(=R5)-R6 or T1;    T1=1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, 4-20C heteroaryl, 7-20C aralkyl, 8-20C aralkenyl, 8-20C aralkynyl, 4-20C cycloalkyl, 5-20C cycloalkenyl or 6-20C cycloalkynyl (all optionally substituted, and the alkyl and cycloalkyl are optionally interrupted by O, S, C(=O) and/or NR14);    R5=NR8, N-OR8, N-NR8R9, O or S;    R6=CO-SR7, CO-NR7-NR10R11, CO-NR7-OR10, CO-O-CO-R7, CO-NR7-CO-R10, CO-NR7-CO-OR10, CO-NR7-CO-NR10R11, NR7R10, OR7, SR7, NR7-NR10R11, NR7-OR10, O-CO-R7, O-CO-OR7, O-CO-NR7R10, NR7-CO-R10, NR7-CO-OR10, NR7-CO-NR10R11, CO-R7, CO-OR7, CO-NR7R10, NR12-C(=NR13)R7 or T1;    R8 and R9=H or T1;    R7, R10 and R11=H or T1;or    R7 or R10 together with that group of R1-R4 which is attached to the same double bond as the group of R1-R4 comprising the R7 or R10=optionally substituted aliphatic 5-, 6- or 7-membered ring;    R12+R13=optionally substituted 5-, 6- or 7-membered ring;    R14=H or optionally substituted 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, 4-20C heteroaryl, 7-20C aralkyl, 8-20C aralkenyl, 8-20C aralkynyl, 5-20C cycloalkyl, 5-20C cycloalkenyl or 6-20C cycloalkynyl;    D'=a group of formula (III) or (IV);    R17 and R18=T1;or    R17+R18, R17+R22, R17+R20 and/or R18+R19=optionally substituted 5-, 6- or 7-membered ring;    R15, R16, R19, and R20 to R24=H, 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-NR25R26, CO-NR25-CO-R26, CO-NR25-CO-OR26, or T1;    R25 to R27=H or optionally substituted 1-20C alkyl, 6-20C aryl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, 4-20C heteroaryl, 7-20C aralkyl, 5-20C aralkenyl, 8-20C aralkynyl, 4-20C cycloalkyl, 5-20C cycloalkenyl or 6-20C cycloalkynyl, where the alkyl and cycloalkyl are optionally interrupted by O, S, C(=O) and/or NR14;    A'=a group of formula (V), (VI) or (VII);    Y'-=an inorganic anion (selected from Cl-, Br-, I-, SCN-, BF4-, PF6-, ClO4-, SbF6-, or AsF6-) or organic anion (selected from carboxylate, sulfonate, sulfate, phosphate, phosphonate, -CO(C=O)O- or -NR14-S(=O)2O-);    G1 and 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-O-P(=O)(O-Z'+)2, -R28-O-P(=O)(OH)(O-Z'+), -R28-CO-NH-OH, -R28-S(=O)2NH-OH, -R28-NR14-S(=O)2OH or -R28-NR14-S(=O)2O-Z'+;    Z'+=N(R14)4+, Li+, Na+, K+ or an ammonium cation which is part of a compound of formula (I) as part of group A';    R28=direct bond or optionally substituted 1-20C alkylene, 2-20C alkenylene, 2-20C alkynylene, 6-20C arylene, 4-9C heteroarylene, 7-11C aralkylene, 5-11C aralkenylene, 8-11C aralkynylene, 6-11C heteroaralkylene, 7-11C heteroaralkenylene, 7-11C heteroaralkynylene, 5-6C cycloalkylene, 1-20C alkylene-6-20C arylene, 1-20C alkylene-4-9C heteroarylene, 1-20C alkylene-6-20C arylene-1-20C alkylene-, 1-20C alkylene-4-9C heteroarylene-1-20C alkylene, -O-1-20C alkylene, -O-2-20C alkenylene, -O-2-20C alkynylene, -O-6-20C arylene, -O-4-9C heteroarylene, -O-7-11C aralkylene, -O-8-11C aralkenylene, -O-8-11C aralkynylene, -O-6-11C heteroaralkylene, -O-7-11C heteroaralkenylene, -O-7-11C heteroaralkynylene, -O-5-6C cycloalkylene, -O-1-20C alkylene-6-20C arylene, -O-1-20C alkylene-4-9C heteroarylene, -O-1-20C alkylene-6-20C arylene-1-20C alkylene or -O-1-20C alkylene-4-9C heteroarylene-1-20C alkylene;    R30 to R33=G', H, halo or T1;or    a group of formula (ia) or two vicinal groups of R30-R33=optionally substituted aliphatic 5-, 6- or 7-membered ring;    R101 and R103=H, halo or T1;    R102 or R104=H, halo, T1 or D';or    R101+R102 and/or R103+R104, or R101+R15 or R101+R16=optionally substituted aliphatic 5-, 6- or 7-membered ring.    Provided that:    (1) if m is 0, R1+R15, R1+R16, R2+R15 or R2+R16 can form optionally substituted aliphatic 5-, 6- or 7-membered ring;    (2) if m is 0, R2+R15 can form optionally substituted heteroaromatic 5-, 6- or 7-membered ring;    (3) a substituent R30-R33 of A' ortho to the group of formula (ia);    (4) either if n is 0 or if n is 1, R2+R4 optionally form optionally substituted aliphatic 5-, 6- or 7-membered ring;    (5) if at least one of R1-R4 is fluorinated 1-8C alkyl, -S(=O)2OR7, -S(=O)2R7, -S(=O)R7, -S(=O)OR7 or -C(=R5)-R6, then A' is a group of formula (VI) or (VII);    (6) if R7 or R10 is part of R2 with n is 0, or is part of R4 with n is 1, it can form together with a substituent R30-R33 of A' ortho to the formula (ia) an optionally substituted aliphatic 5-, 6- or 7-membered ring; and    (7) at least one of R30-R33 is G'.    SPECIFIC COMPOUNDS - 45 Compounds are disclosed as the compound (I), e.g. methine dyes of formula (IA) to (ID) and (IF).    EXAMPLE - No suitable example given.