Core-shell type quantum dot fluorescent fine particles

摘要

PROBLEM TO BE SOLVED: To provide a fluorescent material for emitting a near ultraviolet light which is applicable to light emitting diodes, electro-luminescent elements and semiconductor laser elements, has excellent monochromaticity with high efficiency, and has a stable structure.;SOLUTION: An ultraviolet fluorescent material having high luminous efficiency, wherein the peak wavelength of ultraviolet light to be emitted can be controlled by having a quantum dot structure wherein a fine crystal of zinc oxide having an average diameter of 1-10 nm serves as a core, and the surface of the zinc oxide fine crystal is covered with at least one of LiGaO₂, LiAlO₂, NaGaO₂, or NaAlO₂ which has a crystal structure similar to that of the zinc oxide and low lattice mismatch and hardly suffers from structural defects, or a solid solution thereof.;COPYRIGHT: (C)2009,JPO&INPIT