NOVELTY - An electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with a methin dye (I).    USE - Electrode layer is used for photoelectric conversion device used in dye sensitized solar cell (both claimed).    DETAILED DESCRIPTION - An electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with a methin dye of formula (I).    m=0 or 1;    n=0-5;    R1-R4=H, -S(=O)2OR7, -S(=O)2R7, -S(=O)R7, -S(=O)OR7, fluorinated 1-8C alkyl, group of formula: -C(=R5)(-R6) (i), or 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 in which alkyl and cycloalkyl are optionally interrupted by O, S, C(=O), or NR14, or substituent (R30-R33);    R5=NR8, N-OR8, N-NR8R9, O or S;    R6=e.g. CO-SR7, CO-NR7-NR10R11, and CO-NR7-OR10;    R8,R9=e.g. H, 1-20C alkyl, and 2-20C alkenyl;    R7,R10,R11=e.g. H, 1-20C alkyl, 2-20C alkenyl, and 2-20C alkynyl;    D'=group of formula (III) or (IV);    R17,R18=1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, 4-36C heteroaryl, 7-20C aralkyl, 8-20C aralkenyl, 5-20C aralkynyl, 4-20C cycloalkyl, 5-20C cycloalkenyl or 6-20C cycloalkynyl (all optionally substituted);    R15,R16,R19-R24=e.g. H, NR25R26, OR25, and SR25;    R25-R26=e.g. H, 1-20C alkyl, 6-20C aryl, 2-20C alkenyl, and 2-20C alkynyl;    A=group of formula (V),(VI) or (VII);    Y-=inorganic or organic anion, preferably Cl-, Br-, I-, SCN-, BF4-, PF6-, ClO4-, SbF6-, AsF6- or organic anion chosen from carboxylate, sulfonate, sulfate, phosphate, phosphonate, -CO(C=O)O- and -NR14-S(=O)2O-;    G,G'=e.g. -R28-COOH, -R28-COO-Z+, and -R28-CO(C=O)OH;    Z+=e.g. N(R14)4+, Li+, Na+, or K+;    R28=e.g. direct bond, 1-20C alkylene, 2-20C alkenylene, and 2-20C alkynylene;    R30-R33=e.g. G', H, halo, 1-20C alkyl, 2-20C alkenyl, and 2-20C alkynyl;and    R101-R104=H, halo, or 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, 4-20C heteroaryl, 7-20C aralkyl, 5-20C aralkenyl, 5-20C aralkynyl, 5-20C cycloalkyl, 5-20C cycloalkenyl or 6-20C cycloalkynyl (all optionally substituted).