NOVELTY - An organic-inorganic hybrid solar cell consists of substrate (A), electrode (B), semiconductor layer (C), substrate (B), electrode (E), and electrolyte containing organic surfactant and titanium dioxide, between the electrodes. The organic surfactant is trifunctional group-containing compound (I).    USE - Organic-inorganic hybrid solar cell (claimed).    ADVANTAGE - The organic-inorganic hybrid solar cell has improved efficiency.    DETAILED DESCRIPTION - An organic-inorganic hybrid solar cell consists of substrate (A), electrode (B), semiconductor layer (C), substrate (B), electrode (E), and electrolyte containing organic surfactant and titanium dioxide, between the electrodes. The organic surfactant is trifunctional group-containing compound of formula (I).    X1-X3=-OH, carboxylic acid group, metal salt of carboxylic acid group, amine salt of carboxylic acid group, sulfonic acid group, metal salt of sulfonic acid group, amine salt of sulfonic acid group, sulfuric acid group, metal salt of sulfuric acid group, amine salt of sulfuric acid group, phosphoric acid group, metal salt of phosphoric acid group, amine salt of phosphoric acid group, phosphorous acid, phosphonic acid group, metal salt of phosphorous acid, amine salt of phosphorous acid, hypophosphoric acid group, metal salt of hypophosphoric acid, or siloxane group;    R1,R2=1-30C alkylene, 1-30C heteroalkylene, 1-30C oxyalkylene, 1-30C thioalkylene, 1-30C oxyheteroalkylene, 1-30C thioheteroalkylene, 6-30C arylene, 6-30C oxyarylene, 6-30C thioarylene, 6-30C arylene alkylene, 2-30C heteroarylene, 2-30C oxyheteroarylene, 2-30C thioheteroarylene, 2-30C heteroarylene alkylene, 5-20C cycloalkylene, 5-20C oxycycloalkylene, 5-20C thiocycloalkylene, 5-20C cycloalkylene alkylene, 2-30C heterocycloalkylene, 2-30C oxyheterocycloalkylene, 2-30C thioheterocycloalkylene, 2-30C thioheterocycloalkylene alkylene,?1-30C alkylene ester, 1-30C heteroalkylene ester, 6-30C arylene ester or 2-30C heteroarylene ester (all optionally substituted);    Y1=S or O;    n=0-1;and    R3=1-30C alkyl, 1-30C heteroaryl, 1-30C alkoxy, 1-30C heterocycloalkylalkoxy, 6-30C aryl, 6-30C arylalkyl, 6-30C aryloxy, 2-30C heteroarylalkyl, 5-20C cycloalkyl, 2-30C heterocycloalkyl alkyl, 1-30C alkyl ester, 1-30C heteroalkyl ester, 2-30C aryl ester or 2-30C heteroaryl ester (all optionally substituted).    An INDEPENDENT CLAIM is included for fabrication of organic-inorganic hybrid solar cell.