TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred property: The size of multi-component light emitting nanoparticles is 1-1000 nm. Preferred Composition: The weight ratio of host compound and dopant compound is 0.1:1-10000:1. The multi-component light emitting nanoparticles further contains anionic dispersant, cationic dispersant, nonionic dispersant and/or macromolecular dispersant. The total content of dispersant is 0.001-50 weight% Preferred Compounds: The dopant compound is chosen from aromatic monocyclic compound, aromatic fused ring compound, hetero monocyclic compound, hetero fused ring compound, stilbene-type compound, styryl-type compound, azobenzene-type compound, carbonium-type compound, indigo-type compound, squalene-type compound fluorene and/or its derivatives. The host compound is chosen from 81 specific compounds such as 4,4'-bis(carbazole-9-yl)biphenyl (CBP), 4,4'-bis(9-carbazole)-2,2'-dimethyl-biphenyl-(4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl) (CDBP), 4,4',4"-tri(N-carbazole)triphenylamine(4,4',4"-tri(N-carbazolyl)triphenylamine) (TCTA), 2,9-dimethyl-4,7-diphenyl-phenanthroline(2,9-dimethyl-4,7-diphenyl-phenanthroline) (BCP) and 9,10-bis(4-(N-carbazole)phenyl)anthracene(9,10-bis-(4-N-carbazolyl)phenyl)anthracene (BCPA) are claimed. The cationic dispersant is chosen from diamine induced quaternary ammonium salt, aliphatic amine, alkoxy polyamine, aliphatic amine polyglycol ether, aliphatic alcohol, polyamine and polystyrene or its derivative. The macromolecular dispersant is chosen from alkyl-hydroxy cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylate, vinylacetate copolymer, polyethylene glycol, polypropylene glycol, polyethylene oxide, polycarbonate, polyvinyl methyl ether, polyacryl amide, polyimide, poly-aryl amine salt, polyethylene oxide-polypropylene oxide copolymer, polyacrylate, condensed arylene sulfonate, polyvinyl sulfuric acid salt and styrene-acrylic acid salt. EXAMPLE - 4-dicyanomethylene-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) (0.2 mg) was dissolved in tetrahydrofuran (32 ml), to obtain 4-dicyanomethylene-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran solution. Then, polyvinyl carbazole (PVK) (1 mg) was dissolved into obtained solution, to obtain DCM-PVK nanoparticles of dispersion liquid.