TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Microparticles: The oxide semiconductor microparticles contain titanium dioxide, zinc oxide or tin oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The oxide semiconductor microparticles sensitized with organic dye which has structure other than the methine group dye (1) or its salt and metal complex. The oxide semiconductor microparticles supports methine type dye or its salt in the presence of an inclusion compound. The optoelectric transducer is obtained by making a thin film of oxide semiconductor microparticles to support the dye. Preferred Definitions:    Y = group of formula (2);    R1,R2 = H, aliphatic hydrocarbon residue optionally having substituent, acyl group optionally having substituent or aromatic residue optionally having substituent, and R1 and R2 form a ring when bonded with benzene ring A and optionally has substituent; and    benzene ring A = aliphatic hydrocarbon residue optionally having substituent, aromatic hydrocarbon residue optionally having substituent, halogen atom, amide, hydroxyl, cyano, nitro, alkoxyl, carboxyl, acyl, alkoxy carbonyl, (un)substituted amino, and the substituents are combined to form ring and optionally has substituent);    X = oxygen atom; and    n = 1-5.    EXAMPLE - N,N-dimethyl amino cinnamaldehyde (in wt.pts) (17.5) and phenyl pyruvic acid (18.4) were dissolved in ethanol (100). Piperazine anhydride (0.5) was added and the resulting mixture was reacted under reflux for 2 hours. The resulting mixture was cooled, and precipitated orange crystal was filtered, water washed and dried. The obtained crystal was purified by column chromatography, and methine type dye of formula (73) (19) was obtained as orange crystal by recrystallization with toluene. The obtained dye was dissolved in ethanol so that the concentration was 3.2x10-4 M. Porous board (semiconductor thin film electrode formed by sintering porous titanium oxide at 450degreesC on transparent electroconductivity glass electrode for 30 minutes) was immersed at room temperature into the resulting solution for 12 hours and dye was supported. The dye supported porous board was washed and dried, and optoelectric transducer having semiconductor thin film sensitized with dye was obtained. The obtained transducer had conversion efficiency of 4.7% when the short circuit current was 10.4 mA/cm2 and releasing voltage was 0.63 V.    n1 = 1;    X2 = O;    R7,R8 = CH3;    R9-R12,A6-A8 = H; and    A5 = Ph.