Yeom, TH Lee, SH Lee, YH Oh, MH Choh, SH 2024-01-21T19:10:38Z 2024-01-21T19:10:38Z 2021-09-05 1996-11 0374-4884 https://pubs.kist.re.kr/handle/201004/144252 The manganese luminescenct center in ZnS:Mn powder and thin films have been investigated as a function of Mn concentration using EPR spectrometer. While the concentration of the isolated Mn2+ ions decreases with increasing Mn concentration, the concentration of the Mn clusters increases. It is turned out that the proper Mn concentration for a good ZnS:Mn ELD is about 0.5 mole%. At high Mn concentrations, where the ZnS powder has a dominant hexagonal phase, the Mn ion still prefers to substitute for Zn in ZnS:Mn at the cubic site rather than at the hexagonal site. The isolated Mn2+ ions seem to be changed to monovalent Mn1+ after aging of ZnS:Nln ELD. English KOREAN PHYSICAL SOC ZNS-MN Mn2+ EPR characterization of thin film electroluminescent devices Article 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.29, pp.S577 - S581 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 29 S577 S581 scie scopus A1996VW31400048 2-s2.0-19944396210 Physics, Multidisciplinary Physics Article; Proceedings Paper ZNS-MN TFELD Phosphor Film EPR