光致发光
荧光粉
煅烧
分析化学(期刊)
光致发光激发
紫外线
激发
材料科学
化学
光电子学
物理
色谱法
生物化学
量子力学
催化作用
作者
Xiaolong Yang,Bin Lu,Xinyuan Wang,Yoshio Sakka
出处
期刊:Luminescence
[Wiley]
日期:2021-11-23
卷期号:37 (2): 199-207
被引量:3
摘要
A green chemical precipitation route was used to yield a hydrated basic sulfate precursor upon calcination at 1000°C into a series of (Y,Gd)2 O2 SO4 :Dy particles. The phosphors exhibited characteristic Dy3+ emissions from 4 F9/2 →6 HJ (J = 15/2, 13/2, 11/2) transitions under ultraviolet light excitation; the quenching concentration of Dy3+ was determined to be 2.5 at.%. Substitution of Gd3+ for Y3+ led to an additional strong sharp band at ~277 nm (8 S7/2 →6 IJ transition of Gd3+ ) in the photoluminescence excitation spectra, upon which the (Gd0.975 Dy0.025 )2 O2 SO4 phosphor achieved a ~2.8-fold higher photoluminescence intensity via an effective energy transfer from Gd3+ to Dy3+ compared with the 354 nm excitation of Dy3+ . Both the photoluminescence and photoluminescence excitation intensities of (Y,Gd)2 O2 SO4 :Dy phosphors increased with rising Gd3+ concentration and calcination temperature in the range 750-1000°C. A higher Gd3+ concentration slightly prolonged the effective fluorescence lifetime.
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