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Characterization of optical and thermal properties of chalcopyrite compound semiconductors by photoacoustic spectroscopy

光声光谱表征黄铜矿化合物半导体的光学和热性能

基本信息

批准号：
06650377
负责人：
MOROHASHI Makoto
金额：
$ 1.28万
依托单位：
Nagaoka College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650377/
关键词：
Photoasoustic Spectroscopy Multinary Compounds Thermal Diffusivity Chalcopyrite Photothermal phenomena

项目摘要

In this research project, we have investigated an application of photoacoustic spectroscopy to characterization of optical and thermal properties of multinary compound semiconductors. We employed a gas-microphone method as a measurement method, and analyzed the conditions to evaluate the optical absorption coefficients and the thermal diffusivities of these materials. Following results are obtained.1. In the case of using plate type CdS specimen having the thickness less than 2mm, we have good agreement between experimental results and theoretical ones based on the RG theory. For the specimens having thickness larger than 2mm, the difference between the experimental results and the theoretical ones was observed.2. A better technique for the measurements of the photoacoustic spectra of powders was investigated. The dilution method where a powder to be measured is diluted in a transparent matrix powder is found to be better than that with an undiluted powder sample. By means of the theory including sounds coming from the inside parts of the specimen, we have found a good agreement of the theoretical results with the experimental results. To compare with the PA signal of carbon specimen, the optical absorption coefficients of powdered materials were obtained.3. Photoacoustic spectra of CuGaS_2, TlGaSe_2, TlInS_2 were investigated in conjunction with photoconductivity spectra and transmission spectra of these semiconductors.

在本研究项目中，我们研究了光声光谱在多化合物半导体的光学和热性质表征中的应用。我们采用气体传声器法作为测量方法，分析了测量这些材料的光吸收系数和热扩散系数的条件。得到了以下结果：在使用厚度小于2mm的板型CdS试样时，基于RG理论的实验结果与理论结果吻合较好。对于厚度大于2mm的试件，观察了试验结果与理论结果的差异。研究了一种更好的测量粉末光声光谱的方法。用透明基质粉末稀释待测粉末的稀释方法比用未稀释的粉末样品更好。利用包含来自试样内部的声音的理论，我们发现理论结果与实验结果吻合得很好。为了与碳样品的光吸收信号进行比较，得到了粉末材料的光吸收系数。研究了CuGaS_2， TlGaSe_2， TlInS_2的光声光谱，以及这些半导体的光电导光谱和透射光谱。