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首页> 外文期刊>Journal of Materials Science. Materials in Electronics >Optical parameter studies of thermally evaporated As-Se-Sn glassy system
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Optical parameter studies of thermally evaporated As-Se-Sn glassy system

机译：热蒸发As-Se-Sn玻璃态系统的光学参数研究

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摘要

The optical properties of As30Se70-xSnx with (x = 0, 1, 2 and 3 at Sn %) thin films have been investigated. The films used in these Studies were thermally evaporated. The structural characterization revealed that the as-deposited films were amorphous in nature. The spectral and optical parameters have been investigated using spectrophotometric measurements of transmittance in the wavelength range (200-1100 nm). The optical constants were determined from the interference maxima and minima Using the Swanepole method. The dispersion of the refractive index is discussed in terms of the single-oscillator Wemple-Didomenico model. The optical-absorption edge and the optical band gap are calculated from the absorption coefficient values using the non direct transition model proposed by Tauc's extrapolation procedure. The relation between the optical gap and chemical composition in As-Se-Sn glassy system is discussed in terms of the average heat of atomization H-s and the average coordination number N-c.
机译：研究了具有（x = 0、1、2和3，在Sn％处）薄膜的As30Se70-xSnx光学特性。这些研究中使用的薄膜被热蒸发。结构表征表明，所沉积的膜本质上是非晶态的。使用分光光度法测量波长范围（200-1100 nm）中的透射率来研究光谱和光学参数。使用Swanepole方法根据最大和最小干涉确定光学常数。根据单振荡器Wemple-Didomenico模型讨论了折射率的色散。使用Tauc外推程序提出的非直接跃迁模型，由吸收系数值计算出光吸收边缘和光带隙。根据平均雾化热量H-s和平均配位数N-c，讨论了As-Se-Sn玻璃态系统中光学间隙与化学成分之间的关​​系。

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