NOVELTY - An optoelectric transducer has an electron carrying layer (3) and a hole transportation layer (4) provided between an electronic current collection electrode (2a) and a hole current collection electrode (2b). The hole transportation layer contains polymeric material having an ethylene repeating unit, and a compound chosen from nitrogen-containing compounds, a cyclic compound and an aromatic compound.    USE - For solar cells (claimed) used as power supplies of electronic devices such as mobile telephones, electronic notebooks, electronic paper and auxiliary power supplies of rechargeable or dry cell-type electric appliances.    ADVANTAGE - An optoelectric transducer having favorable photoelectric transfer characteristic and long term stability is obtained with improved productivity.    DETAILED DESCRIPTION - An optoelectric transducer has an electron carrying layer (3) and a hole transportation layer (4) provided between an electronic current collection electrode (2a) and a hole current collection electrode (2b). The hole transportation layer contains a polymeric material having an ethylene repeating unit of formula (1), and a compound chosen from nitrogen-containing compounds of formula (2, 3 and 5), a cyclic compound of formula (4) and an aromatic compound of formula C(-Ar')(-R5)=C(-R6)-(CH=CH)n-A.(Ib)    Ar1 = (un)substituted aromatic hydrocarbon group;    Ar2 and Ar3 = (un)substituted monocyclic bivalent, non-fused polycyclic or fused polycyclic aromatic hydrocarbon group;    Ar4 = benzene, thiophene, biphenyl, anthracene or naphthalene;    n = 0 or 1;    Ar ' =(un)substituted aryl;    R5 and R6 = H, (un)substituted alkyl or (un)substituted aryl containing substituted alkyl;    A = 9-anthryl, (un)substituted carbazolyl or group of formula (1B-1 or 1B-2);    R50 and R51 = H, alkyl, alkoxy, halogen or group of formula: -N(-R52)(-R53);    R52 and R53 = alkyl or (un)substituted aryl containing substituted alkyl;    R1, R2, R5, R6, R8-R14 and R17-R24 = (un)substituted (alkyl, aralkyl, aromatic hydrocarbon or heterocyclic group);    R,and R7 = (un)substituted alkylene group or (un)substituted aromatic hydrocarbon;    R4 = H or (un)substituted (alkyl or aromatic hydrocarbon);    R15 = nitrogen atom, boron, alkylidene or (un)substituted trivalent aromatic hydrocarbon; and    R16 = (un)substituted tetravalent aromatic hydrocarbon.    Ar'+R5, R52+R53, R1+R2, R1+R3, R2+R3, R5+R6, R8+R9, R10+R11, R12+R13, R13+R14, R12+R14, R17+R18, R19+R20, R21+R22, or R23+R24 may combine to form a ring.    INDEPENDENT CLAIMS are also included for the following:    (1) a solar cell, using the above optoelectric transducer; and    (2) the production of the above optoelectric transducer, which involves providing an electron carrying layer containing a photosensitization compound and a hole transportation layer between an electronic current collection electrode and a hole current collection electrode, where the hole transportation layer is formed by wet film formation using a solution containing the polymeric material and compounds of formulae (Ib, 2, 3, 4 or 5), and porous processing of the hole transportation layer is carried out and the hole current collection electrode is formed touching the layer.    DESCRIPTION OF DRAWING(S) - The figure shows the structure of the optoelectric transducer. (Drawing includes non-English language text).    Substrate (1a,1b)    Electronic current collection electrode (2a)    Hole current collection electrode (2b)    Electron carrying layer (3)    Hole transportation layer (4)    Photosensitization compound (5)