| Er~(3+)/Tm~(3+)/Yb~(3+)共掺杂BaGa2ZnO5粉末的上转换发光 |
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| 引用本文： | 李晓英,牛春晖,任宣玮,吕勇,郎晓萍. Er~(3+)/Tm~(3+)/Yb~(3+)共掺杂BaGa2ZnO5粉末的上转换发光[J]. 发光学报, 2016, 0(12): 1458-1463. DOI: 10.3788/fgxb20163712.1458 |
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| 作者姓名： | 李晓英 牛春晖 任宣玮 吕勇 郎晓萍 |
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| 作者单位： | 北京信息科技大学 仪器科学与光电工程学院,北京,100192 |
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| 基金项目： | 北京市自然科学基金(4154071)；北京市优秀人才培养资助青年骨干个人项目(201400002012G105) |
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| 摘 要： | 对Er~(3+)/Tm~(3+)/Yb~(3+)共掺杂BaGa_2ZnO5粉末的上转换发光特性进行了研究。首先,通过不同的制备工艺研究了BaGa2ZnO5粉末的生成条件。XRD分析表明,由于ZnO的高温分解,必须密封烧结并增加ZnO用量才能制备出BaGa2ZnO5。其次,测量了Er~(3+)/Tm~(3+)/Yb~(3+)共掺杂BaGa2ZnO5粉末在980nmLD激发下的上转换发射光谱,发现存在8个较强上转换发射峰,其中480nm和798nm对应于Tm~(3+)离子能级跃迁,其他上转换峰对应于Er~(3+)离子能级跃迁。另外,测量了980nmLD不同激发功率对应的上转换发射峰强度,并根据激发功率-上转换强度曲线拟合得到了各发射峰对应的多光子吸收过程。最后,根据上转换发射光谱和CIE1931标准数据计算了样品粉末的色坐标为(x=0.4151,y=0.4794) ,比较接近白光色坐标,说明所制备的粉末样品具有产生上转换白光的前景。
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| 关 键 词： | BaGa2 ZnO5 上转换 双光子吸收 三光子吸收 稀土共掺杂 |
Upconverted Luminescence of BaGa2 ZnO5 Powder Co-doped with Er3+/Tm3+/Yb3+ |
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| Abstract: | Upconversion luminescence performance of BaGa2 ZnO5 powder codoped with Er3+/Tm3+/Yb3+ was studied. Firstly, the preparation condition of BaGa2 ZnO5 powder was researched through different preparation technology. XRD analysis proves that BaGa2 ZnO5 must be prepared in sealed environment and with more ZnO due to the phrolysis of ZnO. There are eight emission peaks in the upconverted emission spectrum of BaGa2 ZnO5∶Er3+/Tm3+/Yb3+ powder excited by 980 nm LD, thereinto, 480 nm and 798 nm peaks correspond to energy level transition of Tm3+ ions, and other emission peaks correspond to energy level transition of Er3+ ions. Moreover, the upconverted emission intensities under different exciting power were measured, and the multiple-photon absorp-tion process of each emission peaks was obtained through fitting curve of exciting power-upconversion intensity. At last, the color coordinate of the sample powder was calculated according to the upcon-version emission spectrum and standard data of CIE 1931 . The color coordinate is ( x=0 . 415 1 , y=0. 479 4) and is close to the color coordinate of white light. It proves that the prepared sample powder has the application prospect in the field of white luminescence. |
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| Keywords: | BaGa2 ZnO5 upconversion two-photon absorption three-photon absorption co-doped with rare-earth |
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