Non-linear optical and electrical properties of germanate glasses

被引：31

作者：

El-Rabaie, S. ^{[1
]}

Taha, T. A. ^{[1
]}

Higazy, A. A. ^{[2
]}

机构：

[1] Menufiya Univ, Dept Engn Math & Phys, Fac Elect Engn, Menoufia 32952, Egypt

[2] Menufiya Univ, Dept Phys, Fac Sci, Shibin Al Kawm 32511, Egypt

来源：

PHYSICA B-CONDENSED MATTER | 2013年 / 429卷

关键词：

Germanate glasses; Optical properties; Urbach energy; Electrical conductivity; PHOSPHATE-GLASSES; ABSORPTION; CONDUCTIVITY;

D O I：

10.1016/j.physb.2013.07.029

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Glasses in the system Na2O-GeO2 were prepared via melt quenching technique. The optical absorption spectra were measured in the wavelength range from 190 to 1000 nm. The fundamental absorption edge for all the glasses was analyzed in terms of the theory proposed by Davis and Mott. The position of the absorption edge and hence the value of the optical band gap were found to show anomalous behavior depending On the glass composition. The absorption in these glasses is believed to be associated with indirect transitions. The origin of the Urbach energy is associated with phonon-assisted indirect transitions. The temperature-dependence of DC conductivity for these glasses has been examined in the temperature range 463-623 K. It reveals that the obtained activation energy (0.04-0.54 eV) of these glasses was glass composition dependent. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：1 / 5

页数：5

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