GexAs20Se80-x玻璃的化学组成对结构和物理性质的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2368-2373.

Ge_xAs₂₀Se_80-x玻璃的化学组成对结构和物理性质的影响

许思维¹, 杨晓宁¹, 沈祥²

1.湖南文理学院数理学院,湖南省光电信息集成与光学制造技术重点实验室,常德 415000;
2.宁波大学高等技术研究院,浙江省光电探测材料及器件重点实验室,宁波 315211

收稿日期:2021-05-06 修回日期:2021-06-01 出版日期:2021-07-15 发布日期:2021-08-04
作者简介:许思维(1986—),男,博士研究生。主要从事硫系玻璃结构及其物理性质的研究。E-mail:xusiwei1227@163.com
基金资助:
国家自然科学基金(62004067,11847159);湖南省自然科学基金(2019JJ50410);湖南省教育厅科学研究项目(18C0744);湖南文理学院博士科研启动项目(17BSQD18)

Effect of Chemical Composition of Ge_xAs₂₀Se_80-x Glass on Structure and Physical Properties

XU Siwei¹, YANG Xiaoning¹, SHEN Xiang²

1. Hunan Key Laboratory of Optoelectronic Information Integration and Optical Manufacturing Technology, College of Mathematics and Physics, Hunan University of Arts and Science, Changde 415000, China;
2. Zhejiang Key Laboratory of Photoelectric Materials and Devices, the Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China

Received:2021-05-06 Revised:2021-06-01 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 本文制备了一系列Ge_xAs₂₀Se_80-x硫系玻璃,旨在了解化学组成和平均配位数对其结构和物理性质的影响。采用棱镜耦合法测量玻璃的折射率,采用分光光度法测量玻璃透射率并根据透射谱得到玻璃的光学带隙。研究发现,当玻璃组成满足完全化学计量配比之前,随着Ge含量的增加,玻璃的折射率随之减小,而光学带隙随之增大。通过测量拉曼光谱并对其进行分解,发现随着玻璃化学组成的改变,其结构中异极键相对数量的变化是合理的;而同极键的数量则与光学带隙和折射率的变化密切相关,主要是由于同极键形成的带尾可以降低玻璃的光学带隙。另一方面,玻璃的各个结构单元及物理性质在满足完全化学计量配比的玻璃组成上出现转变行为,由此可以断定,Ge_xAs₂₀Se_80-x硫系玻璃的化学组成主导着其结构和物理性质。

关键词: 硫系玻璃, 结构, 折射率, 光学带隙, 同极键

Abstract: In this paper, a series of Ge_xAs₂₀Se_80-x chalcogenide glasses were prepared to study the influences of chemical composition and mean coordination number on its structure and physical properties. The refractive index was measured by the prism coupling method. The transmission was measured by visible-near infrared spectrophotometer. Optical bandgap was derived through the transmission spectrum. The results show that the refractive index decreases and the optical bandgap increases with increasing Ge content up to a transition point corresponding to chemically stoichiometric composition. Raman spectra were measured and decomposed into different structural units. It is found that the relative number of heteropolar bonds in the glasses changes in a reasonable manner with chemical composition, and the number of homopolar bonds is closely related to the change of the bandgap and the refractive index. The main reason is that the band-tails formed by homopolar bonds reduce the optical bandgap. On the other hand, since the number of the structural units and physical properties of the glasses exhibit transitions at the glass with the chemically stoichiometric composition, it can be concluded that the chemical composition dominates physical properties of Ge_xAs₂₀Se_80-x chalcogenide glasses.

Key words: chalcogenide glass, structure, refractive index, optical bandgap, homopolar bond

中图分类号:

TN213

许思维, 杨晓宁, 沈祥. Ge_xAs₂₀Se_80-x玻璃的化学组成对结构和物理性质的影响[J]. 硅酸盐通报, 2021, 40(7): 2368-2373.

XU Siwei, YANG Xiaoning, SHEN Xiang. Effect of Chemical Composition of Ge_xAs₂₀Se_80-x Glass on Structure and Physical Properties[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2368-2373.

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Ge_xAs₂₀Se_80-x玻璃的化学组成对结构和物理性质的影响

Effect of Chemical Composition of Ge_xAs₂₀Se_80-x Glass on Structure and Physical Properties

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