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合金无序对用布里奇曼法生长的CdZnSe三元晶体热导率和能隙温度依赖性的影响。

Alloy Disordering Effects on the Thermal Conductivity and Energy Gap Temperature Dependence of CdZnSe Ternary Crystals Grown by the Bridgman Method.

作者信息

Strzałkowski Karol, Abouais Ali, Alaoui-Belghiti Amine, Singh Diksha, Hajjaji Abdelowahed

机构信息

Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University in Toruń, ul. Grudziądzka 5, 87-100 Toruń, Poland.

Engineering Science for Energy Lab, National School of Applied Sciences, Chouaib Doukkali University of El Jadida, El Jadida 24000, Morocco.

出版信息

Materials (Basel). 2023 May 25;16(11):3945. doi: 10.3390/ma16113945.

DOI:10.3390/ma16113945
PMID:37297079
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10253836/
Abstract

Investigated in this work, CdZnSe-mixed ternary compounds were grown by the Bridgman method. Several compounds with zinc content varying in the range 0 < x < 1 were produced between two binary parents, CdSe and ZnSe crystals. Using the SEM/EDS technique, the accurate composition of formed crystals was determined along the growth axis. Thanks to that, the grown crystals' axial and radial uniformity were determined. Characterization of the optical and thermal properties was undertaken. The energy gap was measured using photoluminescence spectroscopy for different compositions and temperatures. The bowing parameter describing the behavior of the fundamental gap with composition for this compound was found to be 0.416 ± 0.06. The thermal characteristics of grown CdZnSe alloys were systematically studied. The thermal diffusivity and effusivity of the crystals under investigation were experimentally determined, allowing the calculation of the thermal conductivity. We applied the semi-empirical model that Sadao Adachi developed to analyze the results. Thanks to that, it was possible to estimate the contribution arising from chemical disorder to the crystal's total resistivity.

摘要

在本研究中，采用布里奇曼法生长了CdZnSe混合三元化合物。在两种二元母体CdSe和ZnSe晶体之间制备了几种锌含量在0 < x < 1范围内变化的化合物。利用扫描电子显微镜/能谱仪（SEM/EDS）技术，沿生长轴确定了所形成晶体的精确成分。据此，确定了生长晶体的轴向和径向均匀性。对光学和热学性质进行了表征。使用光致发光光谱法测量了不同成分和温度下的能隙。发现描述该化合物基本能隙随成分变化行为的弯曲参数为0.416±0.06。系统研究了生长的CdZnSe合金的热特性。通过实验确定了所研究晶体的热扩散率和热 effusivity，从而可以计算热导率。我们应用了Sadao Adachi开发的半经验模型来分析结果。据此，可以估计化学无序对晶体总电阻率的贡献。

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3
Photoluminescence and Raman scattering from catalytically grown Zn(x)Cd(1-x)Se alloy nanowires.催化生长的Zn(x)Cd(1-x)Se合金纳米线的光致发光和拉曼散射
J Phys Chem B. 2006 Jun 22;110(24):11691-6. doi: 10.1021/jp056892c.