Method for manufacturing inorganic el blue-light emitting body

Abstract

An object is to reduce effects of emission luminance change of the a light emitting body which exhibits blue light emission (a blue-light emitting body) by electric field excitation, that is, a blue-light emitting body which is applicable to an inorganic EL element on the chromaticity coordinates of the light it emits. Further, another object is to improve the repeatability of images displayed on a light emitting device including the inorganic EL element and to realize stable display with the light emitting device which is hardly affected by luminance change. In a method for manufacturing an inorganic EL blue-light emitting body, a sulfide light emitting body, an additive, and a copper compound are mixed and the obtained mixture is baked at 600° C. or more and 1000° C. or less, whereby the sulfide light emitting body can include copper sulfide (CuxS, wherein x is preferably 0.5 to 2.5) as a part of the sulfide light emitting body.

Dependencies are inferred from the claim text.