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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Photoluminescence from the 5D4 level of Tb3+ ions in K–Ba–Al fluorophosphate glass under pressure
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Photoluminescence from the 5D4 level of Tb3+ ions in K–Ba–Al fluorophosphate glass under pressure

机译：压力下K–Ba–Al氟磷酸盐玻璃中Tb3 +离子的5D4能级的光致发光

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摘要

Fluorescence spectra of Tb3+ ions in 55.5P2O5–17K2O–14.5BaO–8Al2O3–4AlF3–1.0Tb4O7 (PKBAFTb) glass have been measured as a function of high pressures up to 35 GPa at room temperature. A strong red shift of 5D4 → 7FJ (J = 3, 4 and 5) transitions with different rates is observed under pressure, which is attributed to the increasing spin–orbit coupling constant, ζ4f. There is a considerable pressure effect on the magnitude of the crystal-field splittings observed for the 5D4 → 7F4 and 7F5 transitions. The increase in Stark splittings observed under pressure is due to pressure induced electrostatic interaction between the 4f electrons and their ligands. Decay times of the emission from the 5D4 level fit to a single exponential function for the entire pressure range studied. Analyses indicate that the luminescence properties under pressure are more or less reversible, which shows the absence of considerable hysteresis in the present studied glass.
机译：在室温下，测量到高达35 GPa的高压，可以测量55.5P2O5–17K2O–14.5BaO–8Al2O3–4AlF3–1.0Tb4O7（PKBAFTb）玻璃中Tb3 +离子的荧光光谱。在压力下观察到了5D4→7FJ（J = 3、4和5）跃迁的强红移，并具有不同的速率，这归因于自旋轨道耦合常数ζ4f的增加。对于5D4→7F4和7F5跃迁观察到的晶体场分裂的幅度有很大的压力影响。在压力下观察到的斯塔克分裂的增加是由于压力引起的4f电子与其配体之间的静电相互作用。在研究的整个压力范围内，从5D4级别发射的衰减时间适合单个指数函数。分析表明，在压力下的发光特性或多或少是可逆的，这表明在本研究的玻璃中没有明显的滞后现象。

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