TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particles: The oxide semiconductor microparticles contain titanium dioxide, zinc oxide or tin oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The methine type pigment (1a) is preferably pigment of formula (2a). The pigment (2a) is preferably pigment of formula (3a). The pigment (1) is preferably pigment of formula (1b) which is preferably pigment of formula (2b).n,R1,X,Y,A1-A3,benzene ring (b),benzene ring (a),ring Cy=same as defined above;andR2-R8=H, halogen atom, aromatic group optionally having substituent or aliphatic hydrocarbon optionally having substituent, and R2-R8 optionally combined with each other to form a ring optionally having substituent;R9-R16=hydrogen atom, aliphatic-hydrocarbon group optionally having a substituent, aromatic-hydrocarbon group optionally having a substituent, halogen atom or hydroxyl group and R9-R12 and R13-R16 optionally combine with each other to form ring optionally having a substituent;Q=CR17R18, NR19, oxygen atom, sulfur atom, selenium atom or SO2;andR17-R19=hydrogen atom, aliphatic-hydrocarbon group optionally having substituent, and aromatic-hydrocarbon group optionally having substituent.Preferred Composition: The transducer is formed using oxide semiconductor microparticles sensitized with organic dye having structures other than one or more types of methine type pigment (1a) and/or metal complex. The oxide semiconductor microparticles are sensitized by using methine type pigment (1a) in presence of an inclusion compound, to thin film of oxide semiconductor particles. The methine type pigment is of formula: HOOC(CN)C=CH-(CH=CH)n-Z1.Z1=N-1-1C alkylated tetrahydro quinoline-6-yl group or N-1-18C alkylated carbozole-3-yl group;andn=0-3. Preferred Definitions:    X = carboxyl group;    Y = cyano, carboxyl or acyl group;    n = 0-6;    R1 = aliphatic hydrocarbon optionally having substituent, preferably 5-36C aliphatic hydrocarbon optionally having substituent, aromatic hydrocarbon optionally having substituent, preferably aromatic hydrocarbon group optionally having 1-36C optionally substituted aliphatic hydrocarbon as a substituent;and    Z = N-R1 substituted tetrahydro quinoline-6-yl group or N-R1 substituted carbazole-3-yl group.