NOVELTY - A photoelectric conversion element (10) has an electrode (8) which opposes substrate (1), an electrode (2), a photoelectric conversion layer (6) and a positive hole transport layer (7). The photoelectric conversion layer contains carbonyl group-containing compound (I) and nitrogen-containing compound (II)-(V).    USE - Photoelectric conversion element is used for solar cell (claimed).    ADVANTAGE - The element has excellent photoelectric conversion efficiency.    DETAILED DESCRIPTION - A photoelectric conversion element has an electrode (8) which opposes substrate, an electrode (2), a photoelectric conversion layer and a positive hole transport layer. The photoelectric conversion layer contains carbonyl group-containing compound of formula (I) and nitrogen-containing compound of formula (II)-(V).    Ar'=optionally substituted arylene or heterocyclic group;    R1,R2=optionally substituted alkyl, alkenyl, alkynyl, aryl or heterocyclic group;    or Ar'+R1+R2=cyclic structure;    R3,R4=H, optionally substituted alkyl, alkenyl, alkynyl, aryl, amino, cyano, or heterocyclic group;    R5=alkyl optionally substituted by acidic group, alkenyl, alkynyl, alkoxy, thioalkoxy, seleno alkoxy, amino, aryl or heterocyclic group;    m=1 or more;    R11-R26=H, halo, optionally substituted alkyl, alkoxy, aryl or phenoxy, at least one of R11-R26 contains acidic group;    M=optionally substituted bivalent, trivalent or tetravalent metal atom or 2H;    R31-R42=H, halo, optionally substituted alkyl, alkenyl, alkynyl, aryl, amino, or heterocyclic group, at least one of R31-R42 contains acidic group;    or at least two of R31-R42=cyclic structure or condensed ring structure;    R51-R54,R57,R58=H, halo, optionally substituted alkyl, alkenyl, alkynyl, aryl or heterocyclic group, at least one of R51-R54, R57 and R58 contains acidic group;    R59,R60=optionally substituted alkyl, alkenyl, alkynyl, aryl or heterocyclic group;and    or R59+R60=cyclic structure.    The carbonyl group-containing compound (I) is cis-isomer or trans-isomer. An INDEPENDENT CLAIM is included for solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the photoelectric conversion element. (Drawing includes non-English language text)    Substrate (1)    Electrodes (2,8)    Photoelectric conversion layer (6)    Positive hole transport layer (7)    Photoelectric conversion element (10)