Photoluminescence in ZnGa2O4

Abstract

ZnGa2O4 compound has been prepared by a simple method of ceramic sintering. Its photoluminescence (PL) spectra have been studied using laser beam excitation (l = 334 nm) at 295 and 10 K. A blue-green long wavelength radiation band has been found out with the peak at 480 nm as well as a series of intensive narrow PL peaks centered at 687, 695, 708 and 714 nm (T = 295 K). The first band may be due to the defect material structure or the ZnO trace amount presence. The sharp peaks may appear due to impurities of rare-earth elements.