Effects of Homogeneous Buffer Layer on the Crystalline Quality and Electrical Properties of CdZnTe Epitaxial Films

IF 2.9 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Electron Devices Pub Date : 2025-02-10 DOI:10.1109/TED.2025.3531320

Xue Tian;Tingting Tan;Kun Cao;Xin Wan;Heming Wei;Ran Jiang;Yu Liu;Renying Cheng;Gangqiang Zha

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引用次数: 0

Abstract

The carrier transport process in CdZnTe epitaxial films is significantly influenced by the substantial lattice mismatch between the CdZnTe films and GaAs substrates. To mitigate this issue, a uniform buffer layer was fabricated between the substrates and the CdZnTe films using the close-space sublimation (CSS). The impact of the buffer layers on surface roughness and crystalline quality of the films was investigated through optical microscopy, atomic force microscopy, and X-ray diffraction. The effects on the electrical performance were studied through I–V tests and alpha-particle energy spectra. The results demonstrate that a uniform buffer layer, grown at

$400~^{\circ }$

C for 5 min, significantly enhances the crystalline quality, resistivity, and carrier transport properties of the CdZnTe epitaxial films grown on low-resistance GaAs(001) substrates. After annealing at

$400~^{\circ }$

C in a Te2 atmosphere for 4 h, the energy resolution of the detector improved to 1.5% in vacuum and 11.23% in air conditions.

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来源期刊

IEEE Transactions on Electron Devices 工程技术-工程：电子与电气

CiteScore

5.80

自引率

16.10%

发文量

937

审稿时长

3.8 months

期刊介绍： IEEE Transactions on Electron Devices publishes original and significant contributions relating to the theory, modeling, design, performance and reliability of electron and ion integrated circuit devices and interconnects, involving insulators, metals, organic materials, micro-plasmas, semiconductors, quantum-effect structures, vacuum devices, and emerging materials with applications in bioelectronics, biomedical electronics, computation, communications, displays, microelectromechanics, imaging, micro-actuators, nanoelectronics, optoelectronics, photovoltaics, power ICs and micro-sensors. Tutorial and review papers on these subjects are also published and occasional special issues appear to present a collection of papers which treat particular areas in more depth and breadth.