An optical study of amorphous (Se80Te20)100-xGex thin films using their transmission spectra

被引：6

作者：

Mainika ^{[1
]}

Sharma, Pankaj ^{[2
]}

Katyal, S. C. ^{[2
]}

Thakur, Nagesh ^{[1
]}

机构：

[1] Himachal Pradesh Univ, Dept Phys, Shimla 171005, Himachal Prades, India

[2] Jaypee Univ Informat Technol, Dept Phys, Waknaghat 173215, India

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2008年 / 41卷 / 23期

关键词：

D O I：

10.1088/0022-3727/41/23/235301

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical constants (refractive index and extinction coefficient) have been studied for a-(Se80Te20)(100-x)Ge-x (x = 0, 2, 4, 6) thin films using transmission spectra in the wavelength range 500-2500 nm. It is observed from optical transmission measurements that the optical energy gap (E-g) increases while the refractive index (n) and the extinction coefficient (k) decrease with the incorporation of Ge in the Se-Te system. The increase in the optical energy gap is interpreted by correlating the optical energy gap with the decrease in electronegativity and increase in the heat of atomization (H-s). The dispersion of the refractive index is discussed in terms of the single-oscillator Wemple-DiDomenico model.

引用

页数：5