TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Material: The inorganic porous material consists of inorganic oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The sensitizing dye further contains photosensitization pigment other than terminal amino-group-containing heterocyclic derivative. Preferred Definitions:    X = bivalent aromatic heterocyclic ring of formula (2);    X1 = sulfur, oxygen or selenium;    X2 = C-R6 or nitrogen;    X3 = C=R7 or nitrogen;    R1,R2,R4,R5,R6,R7 = univalent organic residue (aliphatic hydrocarbon, aromatic hydrocarbon, aromatic heterocyclic), having substituents chosen from group (A) or H, where R6 and R7 optionally together form a ring and R4 is preferably electron attracting group such as cyano, ester, amide or perfluoroalkyl;    R3 = carboxyl, phosphoric acid or sulfonic acid group, preferably carboxyl;    group A = halogen, cyano, isocyano, thiocyanate, isothiocyanate, nitro, hydroxyl, mercapto, amino, amide or group of formula (-(A1)o-B-(A2)p-R8);    A1,A2 = oxygen, sulfur or NH;    B = carbonyl, thiocarbonyl, sulfenyl or sulfonyl;    o,p = 0 or 1; and    R8 = hydrogen or univalent aliphatic hydrocarbon, aromatic hydrocarbon, or aromatic heterocyclic having substituents chosen from halogen, cyano, isocyano, thiocyanate, isothiocyanate, nitro, hydroxyl, mercapto, amino or amide.    X2 and X3 are not nitrogen simultaneously. X and Y forms structure having 2,5-thienylene group or 2,5-thieno thienylene group.    EXAMPLE - 5-(2-(2-(N,N-dibutylamino)-5-thienyl)-ethene-1-yl)-thiophene-2-carboxy aldehyde (in g) (3.5), t-butyl cyanoacetate (3.5) and piperidine (4) were added to toluene (200 ml) and reacted. The obtained reaction material was cooled and distilled under reduced pressure. The obtained residue was purified by silica-gel chromatography, to obtain 3-(5-(2-(2-N,N-dibutylamino)-5-thienyl)-ethene-1-yl)-2-thienyl-2-cyano t-butyl acrylate (3.7). The obtained 3-(5-(2-(2-N,N-dibutylamino)-5-thienyl)-ethene-1-yl)-2-thienyl-2-cyano t-butyl acrylate (1.9) and acetic acid (50 ml), were added to round-bottom flask (100 ml). Then, 48% hydrobromic acid (2) was added and stirred at room temperature. The reaction solution was added to ion exchange water, and extracted twice using methyl t-butyl ether (500 ml). The resulting solution was washed with aqueous ammonia and water, and distilled under reduced pressure, to obtain 3-(5-(2-(2-N,N-dibutylamino)-5-thienyl)-ethene-1-yl)-2-thienyl-2-cyano acrylate (1.3). The obtained compound had wide absorption band in visible region.