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Optical and Photoluminescence Properties of the MgAl2O4:M (M = Ti, Mn, Co, Ni) Phosphors: Calcination Behavior and Photoluminescence Mechanism
Wang, Shifa1,2; Gao, Huajing1,3; Yu, Hong1; Li, Peiying1; Li, Yanwu1; Chen, Chaoli1; Wang, Yong1; Yang, Liang4; Yin, Zijuan1
2020-10-01
摘要MgAl2O4:M (M = Ti, Mn, Co, Ni) phosphors were successfully prepared by a modified polyacrylamide gel method. Calcination temperature and metal particle has significant effects on the phase transition, optical and color properties of Mg Al2O4: M phosphors. Ti, M n, Co and Ni metal particles introduced into the MgAl2O4 system can produce a variety of colours from white, grayish black, blue to turquoise blue. Mn, Co and Ni metal particles added into MgAl2O4 system can extend their light absorption to visible light range, while the Ti metal particles clad into the system did not improve significantly. Co metal particles appended into the MgAl2O4 system can cause fluorescence quenching of emission peak at 395 nm and enhancement of emission peak at 405 nm, while the Ti and Mn metal particles infused into the system can bring the enhancement of visible emission peak at 425 nm. The fluorescence quenching of the peak at 395 nm can be ascribed to the wavelength of Co metal particles matching the surface plasmon absorbance band of MgAl2O4:M phosphor. A reduction in emission intensity at 425 nm can be assigned to electron transfer from the conduction band (CB) of MgAl2O4 to the CB of metal particles causing non-radiative decay.
关键词Phosphor Optical properties Calcination temperature Fluorescence quenching Non-radiative decay
DOI10.1080/0371750X.2020.1817789
发表期刊TRANSACTIONS OF THE INDIAN CERAMIC SOCIETY
ISSN0371-750X
卷号79期号:4页码:221-231
通讯作者Wang, Shifa(wangshifa2006@yeah.net)
收录类别SCI
WOS记录号WOS:000597055800001
语种英语