NOVELTY - A pure organic dye, is new.    USE - The pure organic dye is useful in preparing dye-sensitized solar cell (claimed).    ADVANTAGE - The pure organic dye is used for dye-sensitized solar cell as sensitizer, with photoelectric conversion efficiency of over 90% and cell efficiency of over 10%.    DETAILED DESCRIPTION - A pure organic dye of Formula 1, is new.    R1, R2, R3, R4, R5 and R6 = H, alkane group, aryl, alkoxyl or its heterocyclic and derivatives; and    R = group selected from 20 moieties given in the specification e.g. a group of formula (a)-(e);    R7, R8, R17, R18, R39-R42, R51-R54, R63-R66 = H, hydroxyl, nitryl, amino, acyl, alkyl, cycloalkyl, alkoxyl, aryl or its derivatives, optional one of alkylsulfonyl, alkylthio, ester group, haloalkyl, halo, sulfonyl, cyano, alkenyl, acyloxyl, carboxyl and heterocycle;    A = electron-absorption group slected from cyano, acyl, aldehyde group, carboxyl, acylamino, sulfonic group, nitryl, haloform group and tetra ammonium group;    B = carboxyl, orthophosphorous acid, sulfoacid, hypophosphorous acid, hydroxyl, oxidized carboxylic acid, acid amide, boracic acid and squaric acid.    An INDEPENDENT CLAIM is also included for a dye-sensitized solar cell prepared using the organic dye, where the composition comprises: a transparent substrate layer (1), a conductive layer (2), a light-absorption layer (3), a electrolyte layer (6) and a counter electrode (7); the conductive layer (2), the light-absorption layer (3), the electrolyte layer (6) and the counter electrode are connected between the two transparent substrate layers in order. The light-absorption layer is composed of the semiconductor nanometer grain layer (4) and the dye layer (5), where the semiconductor nanometer grain layer is connected to the conductive layer, the dye layer is connected to the electrolyte layer. The transparent substrate layer is composed of glass substrate or plastic; the plastic is optional one of polyethylene glycol terephthalate, polyethylene naphthalate, polycarbonate, polypropylene, polyimide, triacetylcellulose, and polyether sulfone. The conductive layer is composed of optional one of tin indium oxide, tin fluorine oxide, ZnO-Ga2O3, ZnO-Al2O3, tin-base oxide, tin stibium oxide and zinc oxide, mean grain size of semiconductor nanometer grains is more than 0 nm and less than or equal to 50 nm; the dye layer is composed of the organic dye of formula (1). The electrolyte layer is composed of optional one of iodine/lithium iodide electrolyte, or ion liquid and organic hole-transport material. The ion liquid comprises two parts of anion and cation, where the anion is selected from I-, Br-, Cl-, (N(CN)2)-, (N(SO2CF3)2)-, (PF6)-, (BF4)-, (NO3)-, (C(CN)3)-, (B(CN)4)-, (CF3COO)-, (ClO4)-, (BF3CF3)-, (CF3SO3)-, (CF3F2SO3)-, (CH3H2SO3)-, ((CF3SO2)2N)-, ((C2H5SO2)2N)-, ((CF3SO2)3C)-, ((C2F5SO2)3C)-, ((FSO2)3C)-, (CH3CH2OSO3)-, (CF3C(O)O)-, (CF3CF2C(O)O)-, (CH3CH2C(O)O)-, (CH3C(O)O)-, (P(C2H5)3F3)-, (P(CF3)3F3)-, (P(C2H4H)(CF3)2F3)-, (P(C2F3H2)3F3)-, (P(C2F5)(CF3)2F3)-, (P(CF3)3F3)-, (P(C6H5)3F3)-, (P(C3H7)3F3)-, (P(C4H9)3F3)-, (P(C2H5)2F4)-, ((C2H5)2P(O)O)-, ((C2H5)2P(O)O2)2-, (PC6H5F4)-, ((CF3)2P(O)O)-, ((CH3)2P(O)O)-, ((C4H9)2P(O)O)-, (CF3P(O)O2)2-, (CH3P(O)O2)2-, ((CH3O)2P(O)O)-, (BF2(C2F5)2)-, (BF3(C2F5))-, (BF2(CF3)2)-, (B(C2F5)4)-, (BF3(CN))-, (BF2(CN)2)-, (B(CF3)4)-, (B(OCH3)2(C2H5))-, (B(O2C2H4)2)-, (B(O2C2H2)2)-, (B(O2CH4)2)-, (N(CF3)2)-, (AlCl4)-, and (SiF6)-; the organic hole-transport material is 2,2',7,7'-tetradi(N,N-di-P-methoxyl-amine)9,9'-spirobifluorene. The counter electrode 7 is composed of Pt, Au, Ni, Cu, Ag, In, Ru, Pd, Rh, Ir, Os, C and conductive polymer. The conductive polymer is polyaniline, polypyrrole, polythiofuran, poly(p-phenylene vinylene), or polyester.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the dye-sensitized solar cell prepared by the organic dye.    Transparent substrate layer (1)    Conductive layer (2)    Light-absorption layer (3)    Semiconductor nanometer grain layer (4)    Dye layer (5)    Electrolyte layer (6)    Counter electrode (7)