TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation (Claimed): Preparation of the liquid composition comprises: producing the liquid composition under an inert atmosphere using degassed solvent; and/or degassing the obtained liquid composition. Preferred Process: The liquid composition is degassed by an inert gas for at least 15 minutes. Preferred Components: The triplet emitter is at least one metal of tungsten, rhenium, ruthenium, osmium, rhodium, iridium, palladium, platinum or gold.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The composition is present as solution, dispersion or emulsion, preferably as single-phase system. The solubility of the semiconductor in the organic solvent and/or in the mixture of organic solvents is at least 1g/L in room temperature and normal pressure. The semiconductor is high molecular. The triplet emitter is metal complexes, which emits electro luminescence from the triplet condition light, and contains at least one metal with ordinal number of greater than 38. The triplet level of the triplet quencher is at least 0.05 eV less than the triplet level of the triplet emitter. The triplet quencher is molecular oxygen. The content of the triplet quencher is smaller than 1 ppm. The amount of the semiconductor is 0.01-20 wt.%. The organic solvent is substituted aromatic solvents, preferably substituted benzene, napthalene, biphenyl or pyridine, substituted with alkyl group that is fluorinated, halo, cyano, alkoxy groups, dialkyl amino groups or ester group, with non-aromatic solvents with formic acid derivatives, N-alkyl-pyrrolidone or high-boiling ether. The organic solvent is benzotrifluoride, dioxane, trifluoromethoxybenzol, 4-fluoro-benzotrifluoride, 3-fluoropyridine, toluol, 2-fluorotoluol, 2-fluoro-benzotrifluoride, 3-fluorotoluol, 3-fluoro-benzotrifluoride, pyridine, 4-fluorotoluol, 2,5-difluorotoluol, 1-chloro-2,4-difluorobenzol, 2-fluoropyridine, 3-chlorofluorobenzol, 1-chloro-2,5-difluorobenzol, 4-chlorofluorobenzol, chlorobenzol, 2-chlorofluorobenzol, p-xylene, m-xylene, o-xylene, 2,6-lutidine, 2-fluoro-m-xylol, 3-fluoro-o-xylol, 2-chlorobenzotrifluoride, dimethylformamide, 2-chloro-6-fluorotoluol, 2-fluoroanisol, anisole, 2,3-dimethylpyrazine, bromine benzene, 4-fluoroanisole, 3-fluoroanisole, 3-trifluoromethyl-anisole, 2-methylanisole, phenetol, benzodioxol, 4-methylanisole, 3-methylanisole, 4-fluoro-3-methyl-anisole, 1,2-dichloro-benzene, 2-fluorobenzonitrile, 4-fluoroveratrol, 2,6-dimethylanisol, aniline, 3-fluorobenzonitrile, 2,5-fimethylanisole, 2,4-dimethylanisole, benzonitrile, 3,5-dimethylanisol, N,N-dimethylaniline, 1-fluoro-3,5-dimethoxybenzol, phenylacetate, N-methyl aniline, methyl benzoate, N-methylpyrrolidone, 3,4-dimethylanisole, o-tolunitrile, veratrol, ethyl benzoate, N,N-diethyl aniline, propylbenzoate, 1-methylnaphthaline, butyl benzoate, 2-methylbiphenyl, 2-phenyl-pyridine or 2,2'-bitolyl. The organic solvent exhibits a boiling point of greater than 80degreesC. The organic solvent has triplet quencher of less than 10 ppm.