TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The light-receiving surface side protection component consists of a light-receiving surface side support material and a light-receiving surface side sealing material (2a). The thermal layer remains in contact with the light-receiving surface side of photoelectric conversion portion.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The thermal layer is a gel-like material or a sheet-like material, and has light resistance in the protection component. The thermal layer reduces the incidence of light on the photoelectric conversion portion by discoloring at a temperature of 70 degrees C or more. The thermal layer is arranged between the light-receiving surface side support material and the light-receiving surface side sealing material. The thermal layer contains leuco dye and a color developer. The leuco dye is chosen from 3,3-bis(p-dimethylaminophenyl)phthalide, 3,3-bis(p-dimethylaminophenyl)-6-dimethylaminophthalide, 3,3-bis(p-dimethylaminophenyl)-6-diethylaminophthalide, 3,3-bis(p-dimethylaminophenyl)-6-chlorophthalide, 3,3-bis(p-dibutylaminophenyl)phthalide, 3-cyclohexylamino-6-chlorofluoran, 3-dimethylamino-5,7-dimethylfluoran, 3-diethylamino-7-chlorofluoran, 3-diethylamino-7-methylfluoran, 3-diethylamino-7,8-benzfluoran, 3-diethylamino-6-methyl-7-chlorofluoran, 3-dibutylamino-6-methyl-7-anilinofluoran, 3-dipentylamino-6-methyl-7-anilinofluoran, 3-(N-p-tolyl-N-ethylamino)-6-methyl-7-anilinofluoran, 3-pyrrolidino-6-methyl-7-anilinofluoran, 2-(N-(3'-trifluoro methylphenyl)amino)-6-diethylaminofluoran, 2-(3,6-bis(diethylamino)-9-(o-chloroanilino)xanthyl benzoic acid lactam), 3-diethylamino- 6-methyl-7-(m-trichloromethylanilino)fluoran, 3-diethylamino-7-(o-chloroanilino)fluoran, 3-dibutylamino-7-(o-chloroanilino)fluoran, 3-N-methyl-N-amylamino-6-methyl-7-anilinofluoran, 3-N-methyl-N-cyclohexylamino-6-methyl-7-anilinofluoran, 3-(N-methyl-N-isoamylamino)-6-methyl-7-anilinofluoran, 3-(N-methyl-N-isobutylamino)-6-methyl-7-anilinofluoran, 3-diethylamino-6-chloro-7-anilinofluoran, 3-(N-ethyl-N-2-ethoxypropylamino)-6-methyl-7-anilinofluoran, 3-(N-ethyl-N-tetra-furfurylamino)-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 3-(N,N-diethylamino)-5-methyl-7-(N,N-dibenzylamino)fluoran, benzo leuco methylene blue, 6'-chloro-8'-methoxybenzoindolinospiropyran, 6'-bromo-8'-methoxy-benzoindolinospiropyran, 3-(2'-hydroxy-4'-dimethylaminophenyl)-3-(2'-methoxy-5'-chlorophenyl)phthalide, 3-(2'-hydroxy-4'-dimethylaminophenyl)-3-(2'-methoxy-5'-nitrophenyl)phthalide, 3-(2'-hydroxy-4'-diethylaminophenyl)-3-(2'-methoxy-5'-methylphenyl)phthalide, 3-diethylamino-6-methyl-7-(2',4'-dimethyl anilino)fluoran, 3-(2'-methoxy-4'-dimethylaminophenyl)-3-(2'-hydroxy-4'-chloro-5'-methylphenyl)phthalide, 3-morpholino-7-(N-propyl-trifluoromethylanilino)fluoran, 3-morpholino-7-(N-propyl trifluoromethylanilino)fluoran, 3-morpholino-7-(N-propyl-trifluoro-p-methylanilino)fluoran, 3-pyrrolidino-7-trifluoro-o-methylanilinofluoran, 3-pyrrolidino-7-trifluoro-m-methylanilinofluoran, 3-pyrrolidino-7-trifluoro-p-methylanilinofluoran, 3-diethylamino-5-chloro-7-(N-benzyltrifluoromethylanilino)fluoran, 3-pyrrolidino-7-(di-p-chlorophenyl)methylaminofluoran, 3-diethylamino-5-chloro-7-(( alpha )-phenylethylamino)fluoran, 3-(N-ethyl-p-toluidino)-7-(( alpha )-phenylethylamino)fluoran, 3-diethylamino-7-(o-methoxycarbonylphenylamino)fluoran, 3-diethylamino-5-methyl-7-(( alpha )-phenylethylamino)fluoran, 3-diethylamino-7-piperidinofluoran, 2-chloro-3-(N-o-methyltoluidino)-7-(p-butylanilino)fluoran, 2-chloro-3-(N-m-methyltoluidino)-7-(p-butylanilino)fluoran, 2-chloro-3-(N-p-methyltoluidino)-7-(p-butylanilino)fluoran, 3-(N-benzyl-N-cyclohexylamino)-5,6-benzo-7-( alpha )-naphthylamino-4'-bromofluoran, 3-diethylamino-6-methyl-7-mesidino-4',5'-benzofluoran, 3-(p-dimethylaminophenyl)-3-(1,1-bis(p-dimethylaminophenyl)ethylen 2-yl)phthalide, 3-(p-dimethylaminophenyl)-3-(1,1-bis(p-dimethylaminophenyl)ethylen-2-yl)-6-dimethylaminophthalide, 3-(p-dimethylaminophenyl)-3-(1-pdimethyl-aminophenyl-1-phenylethylen-2-yl)phthalide, 3-(p-dimethylaminophenyl)-3-(1-p-dimethyl-aminophenyl-1-p-chlorophenylethylen-2-yl)-6-dimethylaminophthalide, 3-(4'-dimethylamino-2'-methoxy)-3-(1"-p-dimethylaminophenyl-1"-p-chlorophenyl-1",3"-butadien-4"-yl)benzophthalide, 3-(4'-dimethylamino-2'-benzyloxy)-3-(1"-p- dimethylaminophenyl-1"-phenyl-1",3"-butadien- 4"-yl)benzophthalide, 3-dimethylamino-6-dimethylaminofluorene-9-spiro-3'-(6'-dimethylamino)phthalide, 3,3-bis(2-(p-dimethylaminophenyl)-2-(p-methoxyphenyl)ethenyl)-4,5,6,7-tetrachlorophthalide, 3-bis(1,1-bis(4-pyrrolidinophenyl)ethylen-2-yl)-5,6-dichloro-4,7-dibromophthalide, bis(p-dimethylaminostyryl)-1-naphthalene sulfonyl methane, and bis(p-dimethylaminostyryl)-1-p-tolylsulfonyl methane. The color developer is chosen from 4,4'-isopropylidene diphenol, 4,4'-isopropylidene-bis(o-methylphenol), 4,4'-secondary butylidenebisphenol, 4,4'-isopropylidene bis(2-tertiary-butylphenol), p-nitro zinc benzoate, 1,3,5-tris(4-tertiary-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 2-(3,4'-dihydroxyphenyl)propane, bis(4-hydroxy-3-methylphenyl)sulfide, 4-(( beta )-(p-methoxyphenoxy)ethoxy)salicylic acid, 1,7-bis(4-hydroxyphenylthio)-3,5-dioxa heptane, 1,5-bis(4-hydroxyphenylthio)-5-oxapentane, phthalic acid monobenzyl ester monocalcium salt, 4,4'-cyclohexylidene diphenol, 4,4'-isopropylidene bis(2-chlorophenol), 2,2'-methylene bis(4-methyl-6-tertiary-butylphenol), 4,4'-butylidene bis(6-tertiary-butyl-2-methylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-tertiary-butylphenyl)butane, 1,1,3-tris(2-methyl-4-hydroxy- 5-cyclohexylphenyl)butane, 4,4'-thiobis(6-tertiary-butyl-2-methylphenol), 4,4'-diphenolsulfone, 4-isopropoxy-4'-hydroxy diphenylsulfone, 4-benzyloxy-4'-hydroxy diphenylsulfone, 4,4'-diphenol sulfoxide, p-hydroxybenzoic acid isopropyl ester, p-hydroxybenzoic acid, benzyl protocatechuate, stearyl gallate, lauryl gallate, octyl gallate, 1,3-bis(4-hydroxyphenylthio)propane, N,N'-diphenylthiourea, N,N'-di(m-chlorophenyl)thiourea, salicylanilide, bis-(4-hydroxyphenyl)methyl acetate, bis(4-hydroxyphenyl)benzyl acetate, 1,3-bis(4-hydroxycumyl)benzene, 1,4-bis(4-hydroxycumyl)benzene, 2,4'-diphenol sulfone, 2,2'-diallyl-4,4'-diphenol sulfone, 3,4-dihydroxyphenyl-4'-methyl-diphenyl sulfone, zinc salt of 1-acetyloxy-2-naphthoic acid, zinc salt of 2-acetyloxy-1-naphthoic acid, zinc salt of 2-acetyloxy-3-naphthoic acid, ( alpha , alpha )- bis(4-hydroxyphenyl)-( alpha )-methyltoluene, zinc thiocyanate antipyrine complex, tetrabromobisphenol A, tetrabromobisphenol S, 4,4'-thiobis(2-methylphenol), and 4,4'-thiobis(2-chlorophenol).