NOVELTY - An electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with methine dyes having 2-pyridinium acceptor group carrying 2 anchoring groups one of which is attached to the pyridinium nitrogen.    USE - In a photoelectric conversion device which is useful for a dye sensitized solar cell (claimed).    ADVANTAGE - The electrode layers utilized in photoelectric conversion devices are sensitized with certain methine dyes, i.e. methine dyes with a pyridinium acceptor group carrying 2 anchoring groups one of which is attached to the pyridinium nitrogen, have excellent overall properties, in particular that they have a particularly good dye adsorption property onto TiO2 electrode, giving high long-term differential scanning calorimetry (DSC) cell stability and high long-term performance.    DETAILED DESCRIPTION - An electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with methine dyes of formula (I) having 2-pyridinium acceptor group carrying 2 anchoring groups one of which is attached to the pyridinium nitrogen.    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=e.g. H, fluorinated 1-8C alkyl, or T1;    T1=e.g. 1-20C alkyl, 2-20C alkenyl, 2-20C alkynyl, 6-20C aryl, or 6-20C cycloalkynyl (all optionally substituted, and the alkyl and cycloalkyl are optionally interrupted);    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=e.g. H or T1;    A'=a group of formula (V), (VI) or (VII);    Y'-=e.g. Cl-, Br-, AsF6-, carboxylate, sulfonate or phosphonate;    G1 and G'=e.g. -R28-CO-NH-OH or -R28-S(=O)2NH-OH;    R28=e.g. direct bond or optionally substituted 1-20C alkylene, 2-20C alkenylene or 2-20C alkynylene;    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.    Full Definitions are given in the DEFINITIONS (Full Definitions) section. INDEPENDENT CLAIMS are included for the following:    (1) a photoelectric conversion device comprising the electrode layer;    (2) a dye sensitized solar cell comprising the photoelectric conversion device;    (3) using the compound (I) as a dye in a dye sensitized solar cell; and    (4) a new methine dyes of formula (I), with the proviso that R2+R15 and/or R2+R16 do not form optionally substituted aliphatic 5-, 6- or 7-membered ring.