Enhanced Up‐Conversion Luminescence in Er3+‐Doped 25GeS2·35Ga2S3·40CsCl Chalcogenide Glass–Ceramics
Enhanced Up‐Conversion Luminescence in Er3+‐Doped 25GeS2·35Ga2S3·40CsCl Chalcogenide Glass–Ceramics
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DOI：
10.1111/jace.12102
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发表时间：
2013-03
影响因子：
3.9
通讯作者：
Changgui Lin;L. Calvez;Zhuobin Li;S. Dai;H. Tao;Hongli Ma;Xianghua Zhang;B. Moine;Xiujian Zhao
中科院分区：
文献类型：
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作者：
Changgui Lin;L. Calvez;Zhuobin Li;S. Dai;H. Tao;Hongli Ma;Xianghua Zhang;B. Moine;Xiujian Zhao
稀土掺杂硫系微晶玻璃的发光增强是潜在的集成光电子器件的研究热点。然而，在结晶后的发光增强的基本机制仍然在很大程度上未知。报道了基于25 GeS 2·35 Ga 2S 3·40 CsCl：0.3Er玻璃组成的宽透射硫系玻璃和微晶玻璃的制备和表征，并讨论了其发光增强的机理。通过对Er ~（3+）~ 4 I_（9/2）-~ 4 I_（15/2）跃迁的监测，发现微晶玻璃的上转换发光强度是基础玻璃的12倍。利用电子顺磁共振（EPR）和拉曼散射光谱研究了Er 3+离子的选择性环境和晶化过程中的微结构演化。这两个结果都表明，上转换发光的增强主要与微晶玻璃残余玻璃基质中的局部环境演化有关，即从混合氯硫配位到低声子能量氯配位。
Enhanced luminescence in rare-earth-doped chalcogenide glass–ceramics is of great interest for the potential integrated optoelectronic devices. However, fundamental mechanism on the enhancement of luminescence upon crystallization remains largely unknown. We report the fabrication and characterization of wide transmission chalcogenide glass and glass–ceramics based on the 25GeS2·35Ga2S3·40CsCl:0.3Er glass composition, and discuss the mechanism of enhanced luminescence. By monitoring the 4I9/2–4I15/2 of Er3+ transition, up-conversion luminescence of 12 times higher was observed in glass–ceramics compared with that in base glass. Electron paramagnetic resonance (EPR) and Raman scattering spectroscopies were employed to obtain the information of selective environment of Er3+ ions and microstructural evolution with the crystallization progress. Both of them evidenced that the enhanced up-conversion luminescence was mainly related to the local environmental evolution from a mixed chlorine-sulfur coordination to a low phonon energy chlorine coordination in the residual glassy matrix of glass–ceramics.