Light emitting nanoparticle

Patent Granted A multicomponent light emitting nanoparticle, a luminophore containing the nanoparticle, and an organic photoelectric device containing the luminophore are provided to improve the energy transfer efficiency from a host to a dopant, thereby enhancing luminous effect. A multicomponent light emitting nanoparticle comprises a host compound which can transport a hole or an electron; and a dopant compound which comprises a coloring matter or a dye and is dispersed by a nano-size of 1,000 nm or less. Preferably the ratio of the host compound and the dopant compound is 0.1:1 to 10,000:1 by weight.