NOVELTY - A trialkoxysilyl group-containing dye (I) is new.    USE - New trialkoxysilyl group-containing dye is used for dye sensitization photoelectric conversion element for dye-sensitized solar cell (both claimed).    ADVANTAGE - The trialkoxysilyl group-containing dye provides dye-sensitized solar cell having excellent stability and photoelectric conversion efficiency.    DETAILED DESCRIPTION - A trialkoxysilyl group-containing dye of formula (I) is new.    R=1-50C optionally substituted alkyl, aryl, alkoxy, halo, amide, cyano, hydroxy, nitro, acyl, aryl or 1-50C heteroaryl;    A=1-50C optionally substituted heteroaryl, 1-30C optionally substituted aryl, halo, amide, cyano, hydroxy, nitro, acyl, 1-30C alkyl, 1-30C alkoxy, 1-30C alkylcarbonyl or 6-20C optionally substituted aryl;and    R1=1-50C optionally substituted alkyl, alkoxy, halo, amide, cyano, hydroxy, nitro, acyl, aryl or 1-30C heteroaryl.    An INDEPENDENT CLAIM is included for manufacture of the compound (I) e.g. N-(9,9-dimethyl-9H-fluoren-2-yl)-9,9-dimethyl-N-(4-(5-(5-(triethoxysilyl)thiophen-2-yl)thiophen-2-yl)phenyl)-9H-fluoren-2-amine, which involves reacting N-(9,9-dimethyl-9H-fluoren-2-yl)-9,9-dimethyl-N-(4-(5-(thiophen-2-yl)thiophen-2-yl)phenyl)-9H-fluoren-2-amine with iodine in presence of n-butyllithium and diethylether, to obtain N-(9,9-dimethyl-9H-fluoren-2-yl)-N-(4-(5-(5-iodothiophen-2-yl)thiophen-2-yl)phenyl)-9,9-dimethyl-9H-fluoren-2-amine (Ia), and reacting obtained compound (Ia) with diethoxy-methoxymethyl-silane in presence of bis(dibenzylideneacetone)palladium(0), o-tolyl phosphate, N-methylpyrrolidone and N,N-diethylethanamine, and N,N-bis(9,9-dimethyl-9H-fluoren-2-yl)-2-(5-(5-(triethoxysilyl)thiophen-2-yl)thiophen-2-yl)-1-benzothiophen-6-amine, which involves reacting N,N-bis(9,9-dimethyl-9H-fluoren-2-yl)-1-benzothiophen-6-amine with iodine in presence of n-butyllithium and diethylether, to obtain N,N-bis(9,9-dimethyl-9H-fluoren-2-yl)-2-iodo-1-benzothiophen-6-amine (IIa), reacting obtained compound (IIa) with (2,2')bithiophenyl-5-yl-trimethyl-stannane in presence of tetrakis(triphenylphosphine)palladium and toluene, to obtain N,N-bis(9,9-dimethyl-9H-fluoren-2-yl)-2-(5-(thiophen-2-yl)thiophen-2-yl)-1-benzothiophen-6-amine (IIb), and reacting obtained compound (IIb) with iodine, to obtain N,N-bis(9,9-dimethyl-9H-fluoren-2-yl)-2-(5-(5-iodothiophen-2-yl)thiophen-2-yl)-1-benzothiophen-6-amine (IIc), and reacting obtained compound (IIc) with diethoxy-methoxymethyl-silane in presence of bis(dibenzylideneacetone)palladium(0), o-tolyl phosphate, N-methylpyrrolidone, and N,N-diethylethanamine.