Preparation and luminescence properties of Li+, Na+ co-doped (YxGdyLu1-x-y)2O3: 0.5%Pr3+ phosphors
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摘要: 用高温固相法制备了Li+,Na+共掺(YxGdyLu1-x-y)2O3:0.5%Pr3+荧光粉末。用XRD对样品进行结构表征,用扫描电镜观测了样品的形貌,测量了样品的激发光谱、发射光谱及发光衰减曲线。结果显示,Li+、Na+和Pr3+的掺杂没有引起(YxGdyLu1-x-y)2O3立方晶相结构的改变。在单一基质中掺杂的Li+、Na+可有效改善晶粒尺寸,在复合基质中掺杂的Li+、Na+,不仅可以有效改善晶粒尺寸,还使得样品有陶瓷化的趋势。在272 nm激发下,粉末样品在632 nm处均呈现较强的Pr3+红色发射。不同条件下,1 000℃煅烧2 h获得的(Y0.05Gd0.05Lu0.9)2O3:0.5%Pr3+,2.5%Li+,1%Na+荧光粉末的发光最强,且荧光寿命较短。
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关键词:
- 荧光粉末 /
- Li+, Na+共掺(YxGdyLu1-x-y)2O3:0.5%Pr3+ /
- 发光强度 /
- 荧光寿命
Abstract: Li+, Na+ co-doped (YxGdyLu1-x-y)2O3:0.5%Pr3+ phosphors were synthesized with a high temperature solid-state reaction. The structures of the samples were characterized by XRD. The excitation spectra, emission spectra and fluorescence lifetime of the samples were measured and analyzed using a fluorescence spectrophotometer. The results show that they are still the cubic phase of the matrix for Li+, Na+, doped (YxGdyLu1-x-y)2O3:Pr3+ samples. The doping of Li+ and Na+ in a single matrix can effectively improve the grain size while the doping of Li+ and Na+ in a composite matrix not only effectively improves the grain size, but also causes the sample to become ceramic. Under excitation at 272 nm, the powder samples present strong red emissions of Pr3+ at 632 nm. Under different conditions, (Y0.05Gd0.05Lu0.9)2O3:0.5%Pr3+, 2.5%Li+, 1%Na+ fluorescent powder obtained by calcination at 1 000℃ for two hours has the strongest luminescence, while the lifetime of the sample is shorter. -
表 1 Li+、Na+共掺(YxGdyLu1-x-y)2O3:0.5%Pr3+(摩尔浓度)样品
Table 1. Li+, Na+ co-doped (YxGdyLu1-x-y)2O3:0.5%Pr3+ samples(molar concentration)
Sample (YxGdyLu1-x-y)2O3 Pr3+/% Li+/% Na+/% Temperature/℃ 1 (Y0.3Lu0.7)2O3 0.5 0 0 800 2 (Y0.3Gd0.05Lu0.65)2O3 0.5 0 0 800 3 (Y0.3Gd0.1Lu0.6)2O3 0.5 0 0 800 4 (Y0.3Gd0.2Lu0.5)2O3 0.5 0 0 800 5 (Y0.3Gd0.3Lu0.4)2O3 0.5 0 0 800 6 (Y0.05Gd0.05Lu0.9)2O3 0.5 0 0 800 7 Lu2O3 0.5 0 0 800 8 Lu2O3 0.5 2.5 1 800 9 (Y0.3Gd0.3Lu0.4)2O3 0.5 2.5 1 800 10 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 800 11 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 600 12 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 700 13 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 900 14 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 1 000 15 (Y0.05Gd0.05Lu0.9)2O3 0.5 2.5 1 1 150 -
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