NOVELTY - A photoelectric-conversion element comprises an electrode (2), a photoelectric-conversion layer (6) containing semiconductor (5) and sensitizing dye (6) (I), a solid positive hole-transport layer (7), and an electrode (8) on a substrate (1). The solid positive hole-transport layer contains polymer formed by polymerizing thiophene compound (II) or its multimer.    USE - Photoelectric-conversion element is used for solar cell (claimed).    ADVANTAGE - The photoelectric-conversion element has high photoelectric-conversion efficiency and stability.    DETAILED DESCRIPTION - A photoelectric-conversion element comprises an electrode (2), a photoelectric-conversion layer containing semiconductor and sensitizing dye of formula (I), a solid positive hole-transport layer, and an electrode (8) on a substrate. The solid positive hole-transport layer contains polymer formed by polymerizing thiophene compound of formula (II) or its multimer.    R1,R2=H, halo, single bond, optionally substituted aromatic residue, 1-32C linear or branched alkyl, 2-32C alkenyl, 2-32C alkynyl, 1-32C alkoxy, or 1-32C alkylthio;    R3=H, halo, single bond, 1-24C linear or branched alkyl, 6-24C aryl, or 7-24C aralkyl;    or R1+R2+R3=ring structure;    m=1-4;    Ar'=bivalent aromatic hydrocarbon group, unsaturated hydrocarbyl, group of formula (a) or optionally substituted hetero aromatic ring;    Z=organic residue which has acidic group, electron withdrawing group or electron-attracting ring structure;    R4-R9=H, halo, aromatic residue, 1-32C linear or branched alkyl, 2-32C alkenyl, 2-32C alkynyl, 1-32C alkoxy, 7-24C aralkyl, or 1-32C alkylthio;    X=CR6R7;    R5=SiR8R9;    Y1,Y2=H, 1-24C linear or branched alkyl, 6-24C aryl, -OR10, -SR11, or heteroaryl;    R10,R11=H or 1-24C linear or branched alkyl;and    or Y1+Y2=ring.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic cross-sectional view of photoelectric-conversion element.    Substrate (1)    Electrodes (2,8)    Barrier layer (3)    Sensitizing dye (4)    Semiconductor (5)    Photoelectric-conversion layer (6)    Solid positive hole-transport layer (7)    Photoelectric conversion element (10)