微乳液法制备NaYF4∶Yb3+,Er3+粉体及其发光性能

张博; 张希艳; 董玮利; 石慧; 管茂盛

doi:doi:10.3788/fgxb20143504.0431

发光学报, 2014, 35 (4): 431, 网络出版: 2014-05-08

微乳液法制备NaYF₄∶Yb³⁺,Er³⁺粉体及其发光性能

Preparation and Luminescence Properties of NaYF₄∶Yb³⁺,Er³⁺ Powder by Microemulsion Method

论文大纲

张博 ^*张希艳董玮利石慧管茂盛

作者单位

长春理工大学材料科学与工程学院, 吉林长春130022

上转换发光材料微乳液法立方晶相六方晶相 up-conversion luminescence microemulsion method NaYF4∶Yb3+ NaYF4∶Yb3+ Er3+ Er3+ cubic hexagonal

摘要

采用微乳液法制备了纯相立方和六方晶相NaYF4∶Yb3+,Er3+发光材料, 微乳液体系选择了CTAB(十六烷基三甲基溴化铵)-正丁醇-正辛烷-水。研究了NaF/Y3+比例、反应温度、反应时间和体系pH值等对相形成的影响, 以及陈化、后续热处理温度和时间对颗粒尺寸和发光性能的影响。结果表明: 在NaF/Y3+比例小于5、体系pH=5～6、反应温度为140 ℃、反应时间为24 h的条件下, 可得到立方相α-NaYF4∶Yb3+,Er3+, 粒径约为200 nm; 在NaF/Y3+比例大于5、体系pH=1~4、反应温度为160 ℃、反应时间为60 h以上的条件下, 可得到六方相β-NaYF4∶Yb3+,Er3+, 粒径约为1 μm。样品在980 nm激光激发下, 在521, 529, 541, 549 nm 处有发光峰, 最强发光峰为541 nm, 表现为明亮的绿色。

Abstract

Ytterbium(Ⅲ), erbium(Ⅲ) co-doped sodium yttrium fluoride (NaYF4∶Yb3+,Er3+) powder were prepared by microemulsion method. CTAB(Cetyltrimethyl ammonium bromide), n-butyl alcohol, n-octane and water were selected as the microemulsion system. The influence of NaF/Y3+ ratio, reaction temperature, reaction time, pH value, aging time, and heat treatment on phase formation, luminous efficiency and the particle size were studied. The results indicate that α-NaYF4∶Yb3+,Er3+ samples can be obtained at 140 ℃ for 24 h with the optimal pH=5～6, and β-NaYF4∶Yb3+,Er3+ samples can be obtained at 160 ℃ for 60 h with the optimal pH=1～4. The particle sizes of α-NaYF4∶Yb3+,Er3+ and β-NaYF4∶Yb3+,Er3+ are 200 nm and 1 μm, respectively. Excited by 980 nm LD, the samples emit bright green light peaking at 521, 529, 541, 549 nm, and 541 nm is the strongest.

参考文献

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张博, 张希艳, 董玮利, 石慧, 管茂盛. 微乳液法制备NaYF₄∶Yb³⁺,Er³⁺粉体及其发光性能[J]. 发光学报, 2014, 35(4): 431. ZHANG Bo, ZHANG Xi-yan, DONG Wei-li, SHI Hui, GUAN Mao-sheng. Preparation and Luminescence Properties of NaYF₄∶Yb³⁺,Er³⁺ Powder by Microemulsion Method[J]. Chinese Journal of Luminescence, 2014, 35(4): 431.

微乳液法制备NaYF₄∶Yb³⁺,Er³⁺粉体及其发光性能

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