Effect of F/O ratio on up-conversion and down-conversion luminescence properties of Er3+/Yb3+ co-doped SiO2–Al2O3–AlF3-Gd2O3–Na2O glass
Effect of F/O ratio on up-conversion and down-conversion luminescence properties of Er3+/Yb3+ co-doped SiO2–Al2O3–AlF3-Gd2O3–Na2O glass
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DOI：
10.1016/j.jallcom.2020.154274
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发表时间：
2020-06
影响因子：
6.2
通讯作者：
Haozhang Liang;Zhiwei Luo;Xinyu Liu;Boyang Wang;Chunchun Qin;Weicheng Lei;A. Lu
中科院分区：
文献类型：
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作者：
Haozhang Liang;Zhiwei Luo;Xinyu Liu;Boyang Wang;Chunchun Qin;Weicheng Lei;A. Lu
制备了不同F/O比的Er3+/Yb3+共掺杂SiO2–Al2O3–AlF3-Gd2O3–Na2O玻璃。研究了F/O比对玻璃结构和光学性能的影响。通过 XRD 测定玻璃的非晶态性质，并从 DSC 曲线获得玻璃化转变温度 (Tg) 和结晶峰温度 (Tc)。通过红外光谱分析了玻璃网络结构的变化。还研究了块状玻璃的密度和吸收光谱。采用波长可调的氙灯测试了玻璃中Er3+离子的激发光谱、发射光谱和4S3/2级荧光寿命。 Er3+ 离子的上转换发光光谱是在 980 nm 激光激发下测量的。结果表明，当F/O比为0.214时，绿色（2H11/2，4S3/2）和红色（4F9/2）上转换发光强度最高。根据上转换发光强度和泵浦功率的变化规律，证实Er3+离子的上转换绿光(2H11/2→4I15/2,4S3/2→4I15/2)和红光(4F9/2→4I15/2)是基于激发态吸收(ESA)和能量转移上转换的三光子吸收过程 （ETU）机制。最后，还分析了Er3+和Yb3+之间的能量转移跃迁。 CIE 色度坐标是根据在 378 nm 和 980 nm 两个不同激发波长下获得的发射光谱计算得出的。
Er3+/Yb3+co-doped SiO2–Al2O3–AlF3-Gd2O3–Na2O glass with different F/O ratios were prepared. The effect of F/O ratio on the structure and optical properties of the glasses was investigated. The amorphous nature of the glasses was determined by XRD, and the glass transition temperature (Tg) and the crystallization peak temperature (Tc) were obtained from the DSC curves. The change in the structure of the glass network was analyzed by infrared spectroscopy. The density and absorption spectra of the bulk glass was also investigated. The excitation spectrum, emission spectrum and4S3/2level fluorescence lifetime of Er3+ions in the glasses were tested by a Xenon lamp with adjustable wavelength. The up-conversion luminescence spectrum of Er3+ions was measured under excitation of a 980 nm laser. The results show that the green (2H11/2,4S3/2) and red (4F9/2) up-conversion luminescence intensity is the highest when the F/O ratio is 0.214. According to the variation law of up-conversion luminescence intensity and pump power, it is confirmed that the up-conversion green (2H11/2→4I15/2,4S3/2→4I15/2) and red (4F9/2→4I15/2) light of Er3+ions are the three-photon absorption process based on excited state absorption (ESA) and energy transfer up-conversion (ETU) mechanism. Finally, energy transfer transitions between Er3+and Yb3+are also analyzed. The CIE chromaticity coordinates were calculated from the emission spectrum obtained at two different excitation wavelengths of 378 nm and 980 nm.