Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5438079 | Ceramics International | 2017 | 6 Pages |
Abstract
Sr3(PO4)2:Re3+, Li+ (Re = Eu, Sm) red phosphors were prepared via a high temperature solid state reaction, and their structure and luminescence properties were investigated. X-ray diffraction patterns indicate that the phase of as-prepared samples is in good agreement with standard Sr3(PO4)2 structure. Under 395Â nm excitation, the emission of Sr3(PO4)2:Eu3+ consists of a strong peak centered at 622Â nm and two weak peaks centered at 598Â nm and 660Â nm, which correspond to 5D0â7F2, 5D0â7F1 and 5D0â7F3 transitions, respectively. Also, the emission spectrum of Sr3(PO4)2:Sm3+ shows three main peaks at 568Â nm, 603Â nm and 651Â nm, which are attributed to 4G5/2â6HI/2 (I = 5, 7, 9) transitions of Sm3+. Furthermore, luminescence properties of Sr3(PO4)2:Re3+, Li+ (Re = Eu, Sm) samples are enhanced significantly by Li+ ions doping as charge compensator. Results indicate that as-prepared Sr3(PO4)2:Re3+, Li+ (Re = Eu, Sm) could be the potential red phosphors used in white light-emitting diodes.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Li Cheng, Wentao Zhang, Yuhang Li, Siyi Dai, Xianfei Chen, Kehui Qiu,