TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The semiconductor layer further contains titanium oxide or zinc oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): The thiazole-type compound (I) is obtained by hydrolyzing thiazole compound of formula (III). Preferred Definitions:    D'=N(-Ar1)(-Ar2)-Ar3- or group of formula (a);    Ar1,Ar2=alkyl, aryl or heterocyclyl (all optionally substituted);    Ar3=arylene or bivalent heterocyclyl (both optionally substituted);    Ar4,Ar5=alkyl, aryl or aryl (all optionally substituted);    R3-R6=H, alkoxy, hydroxy or N,N-dialkylamino group, linear or branched alkyl or aryl (both optionally substituted);    Z=group of formula (b);    R7,R8=H, or linear or branched alkyl, linear or branch alkoxy (both optionally substituted);    or R7+R8=ring;    Y'=oxygen atom, sulfur atom or NRa;and    Ra=H, or linear or branched alkyl or aryl (both optionally substituted).    R100=protecting group.    SPECIFIC COMPOUNDS - 2-Cyano-2-((2Z)-5-((5-(5-(1-(4-methoxyphenyl)-1H-indol-3-yl)thiophen-2-yl)thiophen-2-yl)methylidene)-4-methyl-2,5-dihydro-1,3-thiazol-2-ylidene)acetic acid of formula (Ia), 2-((2Z)-5-((5-(5-(2-(4-(bis(4-methoxyphenyl)amino)phenyl)ethynyl)thiophen-2-yl)thiophen-2-yl)methylidene)-4-methyl-2,5-dihydro-1,3-thiazol-2-ylidene)-2-cyanoacetic acid and 2-((2Z)-5-((5-(5-(2-(4-(bis(4-methoxyphenyl)amino)phenyl)ethynyl)thiophen-2-yl)thiophen-2-yl)methylidene)-4-phenyl-2,5-dihydro-1,3-thiazol-2-ylidene)-2-cyanoacetic acid, are disclosed as thiazole-type compound (I).    EXAMPLE - (In g) 5-(5-(1-(4-methoxyphenyl)-1H-indol-3-yl)thiophen-2-yl)thiophene-2-carbaldehyde (1) and methyl 2-((2Z)-4-methyl-2,5-dihydrothiophen-2-ylidene)propanoate (0.73) were dissolved in chloroform (20 mL), piperidine (0.43) was added to obtained mixture, heated, refluxed for 10 hours, concentrated under pressure reduction and residue was dissolved in tetrahydrofuran (8 mL). The product was dripped to 300 mL of water containing 1 mL of concentrated hydrochloric acid. The precipitated crystals were separated by filtration, to obtain of methyl 2-cyano-2-((2Z)-5-((5-(5-(1-(4-methoxyphenyl)-1H-indol-3-yl)thiophen-2-yl)thiophen-2-yl)methylidene)-4-methyl-2,5-dihydro-1,3-thiazol-2-ylidene)acetate (0.92) which was then washed using water and methanol. The obtained product (0.1) was dissolved in pyridine (10 mL), lithium iodide (0.19 g) was added to solution, stirred at 115 degrees C for 10 hours and dripped to 400 mL of water, and acidified with the diluted hydrochloric acid. The precipitated crystals were separated by filtration, washed with water, dried and purified, to obtain 2-cyano-2-((2Z)-5-((5-(5-(1-(4-methoxyphenyl)-1H-indol-3-yl)thiophen-2-yl)thiophen-2-yl)methylidene)-4-methyl-2,5-dihydro-1,3-thiazol-2-ylidene)acetic acid as thiazole-type compound (I) with yield of 31%.