TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The oxide semiconductor particles are dipped into the organic dye under a presence of an inclusion compound. The oxide semiconductor particles comprise titanium dioxide as an essential component. The average diameter of the oxide semiconductor particle is 1-500 nm. The dye-sensitized solar cell is manufactured by coating titanium dioxide paste on a transparent conductive substrate, firing the paste-coated substrate to form a titanium dioxide layer, dipping the substrate having the titanium dioxide layer to a solution including the dissolved dye (I) to form a titanium dioxide film electrode having the dye, providing a second glass substrate having a counter electrode on the titanium dioxide film electrode, forming a hole to pass through the second glass substrate and the counter electrode, coupling the counter electrode and the titanium dioxide film electrode by heat and pressure, leaving a thermoplastic polymer film between them, injecting an electrolyte to the thermoplastic polymer film interposed between the counter electrode and the titanium dioxide film electrode through the hole and sealing the thermoplastic polymer film.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): Preparation of (I) comprises: reaction of a bromo compound of formula (R-Br) with 4,4,5,5-tetramethyl-2-thiophen-2-yl-(1,3,2)dioxaborolane compounds of formula (3a) in 1,2-dimethoxyethane to give substituted thiophene compounds of formula (4a); reaction of (4a) with phosphorus oxychloride in dimethylformamide to give substituted thiophene compounds of formula (5a); and reaction of (5a) with cyanoacetate under a presence of piperidine in acetonitrile to give (I). SPECIFIC COMPOUNDS - 6 Compounds (I) are specifically claimed e.g. (Z)-3-(5'-(4-(bis-(9,9-dimethyl-9H-fluoren-2-yl)-amino)-phenyl)-3,4'-dihexyl-(2,2')bithiophenyl-5-yl)-2-cyano-acrylic acid of formula (Ia), (Z)-3-(5''-(4-(bis-(9,9-dimethyl-9H-fluoren-2-yl)-amino)-phenyl)-3,4',4''-trihexyl-(2,2';5',2'')terthiophen-5-yl)-2-cyano-acrylic acid, (Z)-3-(5''-(6-(bis-(9,9-dimethyl-9H-fluoren-2-yl)-amino)-benzo(b)thiophen-2-yl)-3,4',4''-trihexyl-(2,2';5',2'')terthiophen-5-yl)-2-cyano-acrylic acid, (Z)-2-cyano-3-(5'-(4-(9,9-dimethyl-9H-fluoren-2-yl)-1,2,3,3a,4,8b-hexahydro-cyclopenta(b)indol-7-yl)-3,4'-dihexyl-(2,2')bithiophenyl-5-yl)-acrylic acid, and (Z)-2-cyano-3-(5''-(4-(9,9-dimethyl-9H-fluoren-2-yl)-1,2,3,3a,4,8b-hexahydro-cyclopenta(b)indol-7-yl)-3,4',4''-trihexyl-(2,2';5',2'')terthiophen-5-yl)-acrylic acid.    EXAMPLE - After dimethylformamide (20 ml) was put to N,N-bis(9,9-dimethylfluorene-2-nyl)-4-(3',4-dihexyl-2,2'-bithiophene-5-yl)aniline (0.8 g), phosphorus oxychloride (0.302 g) was slowly added to it at 0 degrees C. The mixture was maintained at normal temperatures. After reacting for 30 minutes, the mixture was distilled to remove all solvents. The mixture was divided by a chromatography developer (dichloromethane:hexane of 1:1) to give N,N-bis(9,9-dimethylfluorene-2-nyl)-4-(3',4-dihexyl-5'-formyl-2,2'-bithiophene-5-yl)aniline (A). After cyanoacetic acid (0.047 g) and acetonitrile (30 ml) were put to (A), piperidine (0.023 g) was added to it. The mixture was heated for 12 hours and then all solvents were removed. The mixture was dissolved in dichloromethane and cleansed by water. After extracting only dichloromethane organic solvent, the mixture was dried to obtain a pure (Z)-3-(5'-(4-(bis-(9,9-dimethyl-9H-fluoren-2-yl)-amino)-phenyl)-3,4'-dihexyl-(2,2')bithiophenyl-5-yl)-2-cyano-acrylic acid (54%).