Yb3+-Yb3+ cooperative upconversion in oxyfluoride glass and glass ceramics
Yb3+-Yb3+ cooperative upconversion in oxyfluoride glass and glass ceramics
复制标题
氟氧化物玻璃和玻璃陶瓷中 Yb3 -Yb3 协同上转换
DOI：
10.1016/j.jlumin.2020.117461
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发表时间：
2020-10
影响因子：
3.6
通讯作者：
Wang Pengfei
中科院分区：
文献类型：
--
作者：
Wang Xin;Li Wenhao;Zhao Haiyan;Wang Shunbin;Jia Shijie;Dong Yongkang;Du Yanqiu;Brambilla Gilberto;Wang Pengfei
采用熔体淬冷法制备了掺Yb 3+的氟氧化物玻璃和含KZnF 3纳米晶的氟氧化物玻璃陶瓷。在980 nm激光激发下，玻璃样品中出现了较强的Yb 3 +-Yb 3+协同上转换蓝光发射，热处理20 h后，玻璃陶瓷中的蓝光发射增强了5倍。通过X射线衍射、透射电子显微镜、荧光寿命、吸收光谱和发射光谱研究了样品的发光机理和性质。KZnF 3纳米晶的尺寸在5 nm-20 nm之间，使得玻璃陶瓷样品高度透明。STEM-EDS测试表明Yb的分布与KZnF 3纳米晶的分布一致。氟化物相为Yb 3 +-Yb 3+离子对提供了一个低声子能量的环境，这有利于KZnF 3晶格中强烈的蓝色荧光发射。理论和实验结果表明，Yb 3+掺杂氟氧化物玻璃和含KZnF 3纳米晶的玻璃陶瓷是一种很有前途的蓝色上转换发光材料。
Yb3+-doped oxyfluoride glasses and glass ceramics containing KZnF3nanocrystals were obtained by melt-quenching. Under excitation of a 980 nm laser, a strong blue emission from Yb3+-Yb3+cooperative upconversion was observed in the glass sample, which increased by five times in glass ceramics after heat treatment for 20 h. The photoluminescence mechanism and sample properties were investigated by X-ray diffraction, transmission electron microscopy, fluorescent lifetime, absorption and emission spectra. The size of KZnF3nanocrystals is in the range 5 nm–20 nm, making the glass ceramic samples highly transparent. The STEM-EDS measurements indicate that the distribution of Yb is consistent with that of the KZnF3nanocrystals. Fluroide phase provides a low-phonon-energy environment for Yb3+-Yb3+ion pairs, which facilitates an intense fluorescent blue emission in the KZnF3crystal lattice. Both theoretical and experimental results demonstrate that Yb3+-doped oxyfluoride glasses and glass ceramics containing KZnF3nanocrystals are promising materials for blue upconversion emission.
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