Люминесценция ионов марганца и хрома в соединениях со структурой шпинели

Abstract

Single-phase ceramic samples of MgAl2O4, ZnAl2O4 and LiAl5O8 spinels containing manganese or chromium ions have been synthesized by a high-temperature solid-state reactions method. It has been shown that the luminescence properties of the synthesized phosphors, in particular, the appearance of intense red luminescence from Mn4+ ions, as well as the magnitude of inhomogeneous line broadening in the luminescence spectra of Mn4+ и Cr3+ ions depend on the degree of cation inversion, which provides the charge compensation for stabilizing Mn4+ ions in the octahedral sites of the spinel structures upon the substitution of Al3+ ions, simultaneously resulting in disordered spinel crystal structures.