TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The oxide semiconductor microparticle further comprises carboxyl group, hydroxyl group, sulfo group, phosphoric acid group, amide group, and/or mercapto group in the molecule. The oxide semiconductor unites among the compounds chosen from the group of an organic dye containing at least one pigment, and another metal-complex pigment having another structure, and is sensitized by combined use of 2 or more types of pigment.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The oxide semiconductor microparticles contain titanium dioxide as an essential component. The microparticles support a pigment in the presence of an inclusion compound, and a thin film of the semiconductor microparticles support a pigment. Preferred Definitions:    Ar = optionally substituted aromatic ring, preferably (un)substituted benzene or naphthalene ring;    n = 0-2; and    X = (un)substituted heterocyclic residue.    SPECIFIC COMPOUNDS - 137 compounds of methine group pigment, such as compounds of formula (14) are disclosed.    EXAMPLE - 2-methyl-3-hydroxy-4-carboxy quinaldine (in weight parts) (1.5), and compound of formula-15 (2), were dissolved in ethanol (50), and piperazine anhydride (0.1) was added to the reaction solution. The resultant mixture was refluxed for 1 hour, and cooled and filtered. The mixture was washed and dried, and compound of formula-13 was obtained. The obtained compound had absorption maximum of 510 nm. A semiconductor thin film electrode was bake processed for 30 minutes at 450 degrees C, and immersed in the reaction solution containing obtained compound at room temperature and left for over night. The pigment was supported, and solvent was dried, and optoelectric transducer containing semiconductor thin film to which pigment sensitization was performed, was obtained. The obtained transducer provides battery having short circuit current of 3.1 mA/cm2, releasing voltage of 0.52V, and conversion efficiency of 1.1%. The obtained battery had favorable workability and durability.    n = 1;    R31-R34 = H;    R35 = COOH;    R36 = OH;    R37 = H;    Y12 = C(CH3)2; and    Y13 = N(CH3).