NOVELTY - Electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with a dye having an alkyl compound (I).    USE - The electrode layer is useful in a photoelectric conversion device of a dye sensitized solar cell (all claimed).    ADVANTAGE - The layer exhibit excellent properties such as good dye absorption property on the electrode; high long-term cell stability; high long-term performance; and high energy conversion efficiency for the photoelectric conversion device to enhance open circuit voltage and/or short circuit current of the device by optimizing the dye.    DETAILED DESCRIPTION - Electrode layer comprises a porous film made of oxide semiconductor fine particles sensitized with a dye having an alkyl compound of formula (D-(C(R1)=C(R2))n-A) (I).    n = 1-6;    R1 = H, 1-20C-alkyl (optionally interrupted by O, S, CO and/or NR14), heteroaryl, 6-20C-aryl which carries 1-3 substituents comprising 1-8C-alkyl or monovalent group of formulae (D1a, D1b);    R2 = H, 1-20C-alkyl (optionally interrupted by O, S, CO and/or NR14), heteroaryl or 6-20C-aryl which carries 1-3 substituents comprising 1-8C-alkyl; either    R17, R18 = 1-20C-alkyl, 2-20C-alkenyl, 2-20C-alkynyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 4-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), where alkyl, alkenyl, alkynyl or aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO or NR14; and    R20 = B1; or    R17R18N = optionally substituted 5-7-membered ring; or    R17R20+N to which R17 is attached and the carbon atoms of the benzene ring to which R20 and N-R17 are attached = optionally substituted 5-7-membered ring; or    R17 and R22 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 = optionally substituted 5-7-membered ring; or    R18 and R19 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 = unsubstituted or substituted 5-, 6- or 7-membered ring;    R14 = H, 1-20C-alkyl or 6-10C-aryl;    B1 = 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-COR26, CO-NR25-CO-OR26, 1-20C-alkyl, 2-20C-alkenyl, 2-20C-alkynyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 4-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO and/or NR14;    R15, R16, R19, R21, R22, R23 or R24 = B1;    R25-R27 = H, 1-20C-alkyl, 2-20C-alkenyl, 2-20C-alkynyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 4-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO and/or NR14;    A1 = napthalene compounds of formulae (A1a-A1e);    R29-R35 = radical G, H, halo, OR36, 1-20C-alkyl, 2-20C-alkenyl, 2-20C-alkynyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 5-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO and/or NR14, where at least one of the radicals R29-R35 is a radical G;    R36 = 1-20C-alkyl, 6-20C-aryl or heteroaryl (all optionally substituted), where alkyl is optionally interrupted by O, S, CO or NR14;    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+, -R2-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-OP(=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+;    R28 = direct bond, 1-20C-alkylene, 2-4C-alkenylene or 6-10C-arylene;    Z+ = organic or inorganic cation equivalent;    Y1- = BF4, PF6, SbF6, AsF6 or fluorinated organic anion compound of formula (RF1-C(F)(F)-X-) (Y1a), a benzene compound of formula (Y1b), (RF7-X1-N--X2-RF8) (Y1c), (RF7-X1-C-(X2-RF8)-X3-RF9) (Y1d), (RF11-B-(RF10)(RF12)-RF13) (Y1e) or RF14-C(F)(RF15)-C-S(=O)(=O)-O- (Y1e);    Rf1 = 1-20C-alkyl, haloalkyl, 2-20C-alkenyl, haloalkenyl, 2-20C-alkynyl, haloalkynyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 4-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), or halo, where alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO and/or NR14;    Rf2-Rf6 = 1-20C-alkyl, 2-20C-alkenyl, 2-20C-alkynyl, 6-20C-aryl, heteroaryl, heterocyclyl, 7-20C-aralkyl, 8-20C-aralkenyl, 8-20C-aralkynyl, 4-20C-cycloalkyl, 5-20C-cycloalkenyl or 6-20C-cycloalkynyl (all optionally substituted), halo, H, NR25R26, OR25, SR25, NR25-NR26R27, NR25-OR26, O-CO-R25, O-CO-OR25, O-CO-NR25R26, NR25-CO-R26, NR25-CO-OR26, NR25-CONR26R27, CO-R25, CO-OR25, CO-NR25R26, S-CO-R25, CO-SR25, CONR25-NR26R27, CO-NR25-OR26, CO-O-CO-R25, CO-O-CO-OR25, COO-CO-NR25R26, CO-NR25-CO-R26, or CO-NR25-CO-OR26, where alkyl, alkenyl, alkynyl or the aliphatic moieties in aralkyl, aralkenyl or aralkynyl are optionally interrupted by O, S, CO, and/or NR14, where at least one of the radicals Rf2-Rf6 is fluorine or 1-20C-fluoroalkyl (optionally interrupted by O, S, NR14, and/or CO);    X1-X3 = S(=O)2 or CO; either    Rf7, Rf7a, Rf8, Rf8a or Rf9 = 1-20C-fluoroalkyl (optionally substituted), or 6-20C-fluoroaryl (optionally interrupted by O, S, NR14 or CO); or    Rf7Rf8 = 3-6C-fluoroalkyl;    Rf10-Rf13 = F, 1-20C-fluoroalkyl or 6-20C-fluoroaryl;    Rf14Rf15 = 3-7C-fluoroalkyl (optionally substituted by 1-6C-fluoroalkyl);    Rg1 = 1-20C-alkyl, 1-20C-alkoxy, 6-20C-aryl or 6-20C-aryl-O- (all optionally substituted), where alkyl or alkyl moiety in alkoxy is optionally interrupted by O, S, NR14 or CO, where if R17, R18 are both optionally substituted fluorine, then Y1- is not bistrifluoromethylsulfonimide, C(SO2CF3)3-, hexafluoride antimonate, BF-4 or PF6-, and if A is a naphthalene compound of formula (A2), then Y1- is not (CnF2n1+1SO2)2N-; and    n = 1-18.