NOVELTY - A photo-sensitized anode electrode comprises a transparent substrate comprising a patterned circuit layer, a titanium dioxide layer on the substrate, and a protonized food dye layer on the titanium dioxide layer. The food dye is a triarylmethane dye, e.g. Food Yellow 13, or an azo dye, e.g. Food Red 3.    USE - A photo-sensitized anode electrode used for a dye-sensitized solar cell (DSSC) (claimed).    ADVANTAGE - The protonized food dye layer is environmentally friendly, thus producing a DSSC that can be recycled for reducing environmental pollution. The triarylmethane or azo group of the food dye enhances light absorption, and the light absorption index increases while the maximum absorption wavelength of the food dye is shifted to long wavelength.    DETAILED DESCRIPTION - A photo-sensitized anode electrode comprises a transparent substrate comprising a patterned circuit layer, a titanium dioxide layer on the substrate, and a protonized food dye layer on the titanium dioxide layer. The food dye is a triarylmethane dye or an azo dye. The triarylmethane dye is Food Yellow 13 (color index number (CI) No. 47005; sodium 2-(1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-1,4-dihydroquinoline-6-sulfonate; CI Food Y-13; Quinoline Yellow), Food Red 14 (CI No. 45430; disodium 2-(2,4,5,7-tetraiodo-3-oxidooxoxanthen-9-yl)benzoate monohydrate; CI Food R-14; Erythrosine), Food Blue 5 (CI No. 42051; (4-( alpha -(4-diethylaminophenyl)-5-hydroxy-2,4-disulfophenyl-methylidene)-2,5-cyclohexadien-1-ylidene)diethylammonium hydroxide inner salt; CI Food B-5; Patent Blue V), Food Green 3 (CI No. 42053; N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl) amino)phenyl) (4-hydroxy-2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-benzenemethanaminium hydroxide disodium salt; CI Food G-3), or Food Green 5 (CI No. 61570; ((N,N-4-dimethylaminophenyl)-2-hydroxy-3,6-disulfonato-1-naphthyl-methylidene)-2,5-cyclohexadien-1-ylidene) dimethylammonium hydroxide inner salt sodium salt; C.I. Food G-5). The azo dye is Food Red 3 (CI No. 14720; disodium 4-hydroxy-3-(4-sulfonato-1-naphthylazo)naphthalene-1-sulfonate; CI Food R-3; Carmoisine), Food Red 9 (CI No. 16185; trisodium 2-hydroxy-1-(4-sulfonato-1-naphthylazo)naphthalene-3 ,6-disulfonate; CI Food R-9; Amaranth), or Food Black 1 (CI No. 28440; tetrasodium 1-acetamido-2-hydroxy-3-(4-((4-sulfonatophenylazo)-7-sulfonato-1-naphthylazo))naphthalene-4,6-disulfonate; CI Food Blk-1; Black Pn). An INDEPENDENT CLAIM is included for manufacturing a photo-sensitized anode electrode.