Effect of laser irradiation on thermal and optical properties of selenium–tellurium alloy
Effect of laser irradiation on thermal and optical properties of selenium–tellurium alloy
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DOI：
10.1016/j.jnoncrysol.2009.07.005
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发表时间：
2009-11
影响因子：
3.5
通讯作者：
Adam A Bahishti;M. A. Khan;B. Patel;F. Al-Hazmi;M. Zulfequar
中科院分区：
文献类型：
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作者：
Adam A Bahishti;M. A. Khan;B. Patel;F. Al-Hazmi;M. Zulfequar
采用差示扫描量热仪（DSC）研究了Se-Te硫系玻璃在升温速率为20 K/min的非等温条件下的玻璃化转变温度（Tg）、开始析晶温度（Tc）、峰值析晶温度（Tp）和析晶焓（ΔHC）等析晶参数，得到了玻璃化转变温度（Tg）、开始析晶温度（Tc）、峰值析晶温度（Tp）和析晶焓（ΔHC）的值，并对玻璃化转变温度（Tg）、析晶焓（Δ HC）和析晶焓（ΔHC）进行了分析。研究了不同曝光时间下，激光辐照和非激光辐照的Tp和Δ HC。测量了原始和激光辐照热蒸发Se-Te薄膜的光吸收。薄膜显示出间接的允许带间跃迁，这是由激光照射的影响。随着辐照时间从5分钟增加到20分钟，光学能隙从1.61 eV减小到1.38 eV。结果已分析的基础上，激光辐照引起的缺陷的薄膜。
The crystallization parameters such as glass transition temperature (Tg), onset crystallization temperature (Tc), peak crystallization temperature (Tp) and enthalpy released (ΔHC) of the bulk Se–Te chalcogenide glass has been studied by using Differential Scanning Calorimeter (DSC), under non-isothermal condition at a heating rate of 20K/min. The values of Tg, Tc, Tpand ΔHCwith and without laser irradiation for different exposure time have been studied. The optical absorption of pristine and laser irradiated thermally evaporated Se–Te films has been measured. The films shows indirect allowed interband transition that is influenced by the laser irradiation. The optical energy gap has been found to decrease from 1.61 to 1.38eV with increasing irradiation time from 5 to 20min. The results have been analyzed on the basis of laser irradiation-induced defects in the film.