【摘 要】
：
Sm3+,Eu3+co-coped Ba3Bi2(PO4)4 phosphors,as potential phosphors for white light-emitting diode applications,were synthesized through the solid-state reaction method for the first time.The crystal structure,absorption spectra,photoluminescence properties,d
【机 构】
：
Key Laboratory of Functional Composite Materials of Guizhou Province,Department of Electronic Scienc
论文部分内容阅读
Sm3+,Eu3+co-coped Ba3Bi2(PO4)4 phosphors,as potential phosphors for white light-emitting diode applications,were synthesized through the solid-state reaction method for the first time.The crystal structure,absorption spectra,photoluminescence properties,decay time,energy transfer mechanism,temperature-dependent properties,and Commission International De L\'Eclairage(CIE)chromaticity coordinates were investigated system-atically.The pure eulytite-type Ba3Bi2(PO4)4 phase was obtained after heating at 980℃for 5 h.A notably enhanced absorption efficiency at 393 nm was observed when Sm3+,as a sensitizer,was doped into Ba3Bi1.82(PO4)4:0.18Eu3+and the band gap of the Ba3Bi2(PO4)4 host was estimated to be 4.19 eV.The emission intensity of Ba3Bi1.82(P04)4:0.18Eu3+was sig-nificantly enhanced when Sm3+was co-doped.The exis-tence and mechanism of energy transfer from Sm3+to Eu3+were evaluated by photoluminescence spectra and decay time measurements.The CIE chromaticity coordi-nate of Ba3Bi1.75(PO4)4:0.07Sm3+,0.18Eu3+phosphor was calculated to be(0.5746,0.4197),respectively.
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