Lee, KG Park, KH Yu, BY Pyun, CH Kim, CH Park, HL Mho, SI 2024-01-21T10:40:54Z 2024-01-21T10:40:54Z 2021-09-05 2002-05 0025-5408 https://pubs.kist.re.kr/handle/201004/139577 Photoluminescence and low-voltage cathodoluminescence characteristics of ZnGa2O4 phosphor doped with monovalent ions has been studied. Monovalent ions such as Na+ and Ag+ are incorporated into ZnGa2O4 lattices in order to increase the concentration of oxygen vacancies in the spinel lattice. By doping low concentrations of monovalent ions (Na+, Ag+) into ZnGa2O4, the self-activated blue luminescence originated from oxygen vacancies is enhanced. Also, the blue luminescence intensity is enhanced more along with a good color purity by annealing ZnGa2O4:Na+ in a reducing atmosphere, which is due to increasing the concentration of oxygen vacancies even more. The luminescence band at the UV region (lambda(max) = 360 nm) does not become the major luminescence band by introducing Na+ ion into the ZnGa2O4 lattice, while the UV luminescence band becomes the major one by annealing the undoped ZnGa2O4 in a reducing atmosphere. (C) 2002 Elsevier Science Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD COMPOSITIONAL DEPENDENCE ZINC GALLATE METAL-IONS LUMINESCENCE OXIDES SPINEL LIGAO2 FILMS Photoluminescence and low-voltage cathodoluminescence characteristics of blue phosphor, ZnGa2O4 : M+ (M = Na, Ag) Article 10.1016/S0025-5408(02)00747-X 1 MATERIALS RESEARCH BULLETIN, v.37, no.6, pp.1071 - 1083 MATERIALS RESEARCH BULLETIN 37 6 1071 1083 scie scopus 000176902900006 2-s2.0-0036573824 Materials Science, Multidisciplinary Materials Science Article COMPOSITIONAL DEPENDENCE ZINC GALLATE METAL-IONS LUMINESCENCE OXIDES SPINEL LIGAO2 FILMS optical materials oxides luminescence