TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The tin precursor compound is chosen from tin(II) chloride, tin(II) iodide, tin(II) chloride dihydrate, tin(II) bromide, tin(II) fluoride, tin(II) oxalate, tin(II) sulfide, tin(II) acetate, tin(IV) chloride, tin(IV) chloride pentahydrate, tin(IV) fluoride, tin(IV) iodide, tin(IV) sulfide and tin(IV) tert-butoxide. The antimony precursor compound is chosen from antimony(III) chloride, antimony(V) chloride, antimony(III) ethoxide, antimony(V) sulfide, antimony(V) fluoride, antimony(III) propoxide, antimony(III) iodide and antimony(III) acetate. The molar ratio of antimony precursor compound and tin precursor compound is 0.4:0.9. The tin oxide semiconductor thin film is amorphous film. The concentration of antimony precursor compound and tin precursor compound with respect to total content of composition is 0.1-10 M. The tin oxide semiconductor includes tin oxide of formula: SnOx, where x is more than 0 to 3, and electron as charge carrier. The concentration of charge carrier of the tin oxide semiconductor thin film is 1014 cm-3 to 1016 cm-3.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The solvent is chosen from deionized water, methanol, ethanol, propanol, isopropanol, 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-butoxyethanol, methyl cellosolve, ethyl cellosolve, diethylene glycol methyl ether, ethylene glycol ethyl ether, dipropylene glycol methyl ether, toluene, xylene, hexane, heptane, octane, ethyl acetate, butyl acetate, diethylene glycol dimethyl ether, diethylene glycol dimethyl ethyl ether, methyl methoxypropionic acid, ethyl ethoxypropionic acid, ethyl lactate, propylene glycol methyl ether acetate, propylene glycol methyl ether, propylene glycol propyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, diethylene glycol methyl acetate, diethylene glycol ethyl acetate, acetone, methyl isobutyl ketone, cyclohexanone, dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, gamma -butyrolactone, diethyl ether, ethylene glycol dimethyl ether, diglyme, tetrahydrofuran, acetylacetone and acetonitrile.