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• W2778554138 abstract "Abstract A series of Pr 3+ -doped double perovskite tungstate NaLaMgWO 6 with composition NaLa 1−x MgWO 6 :xPr 3+ (x = 0.01–0.15) were synthesized by a conventional solid-state reaction technique at high temperature. The crystal structure, microstructure, photoluminescence properties as well as decay curves are investigated systematically. The excitation spectrum consists of a host-related excitation band (250–350 nm) and some f-f transition bands of Pr 3+ (440–500 nm), in which the latter ones can match well with the commercially available blue-emitting LED chip. Upon excitation with UV (~ 268 nm) and blue light (~ 451 nm), the as-prepared phosphors exhibit red emission originating in the transitions from 3 P 0 state of Pr 3+ , in which the transition of 3 P 0 → 3 F 2 (~ 654 nm) is dominant. The optimal concentration of Pr 3+ is confirmed to be 7%, beyond which the d-d interaction plays an important role in the concentration quenching phenomenon of Pr 3+ . Furthermore, the luminescence decay lifetime for 3 P 0 → 3 F 2 transition of Pr 3+ is of microsecond level and decreases with the increase in Pr 3+ ion concentration. Finally, a white LED device is fabricated with the combination of phosphors (YAG:Ce 3+ +NaLaMgWO 6 :Pr 3+ ) and commercial blue-emitting LED chip to explore preliminarily the potential application of NaLaMgWO 6 :Pr 3+ red phosphor in solid state lighting field." @default.
• W2778554138 created "2018-01-05" @default.
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• W2778554138 date "2018-04-01" @default.
• W2778554138 modified "2023-09-23" @default.
• W2778554138 title "NaLaMgWO6:Pr3+: A novel blue-light excitable red-emitting phosphor for white light-emitting diodes" @default.
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• W2778554138 doi "https://doi.org/10.1016/j.jlumin.2017.12.050" @default.
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