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Abstract <p>The review presents an analysis of the micro- and nanohardness of crystals and epitaxial structures based on mercury–cadmium–telluride (MCT, HgCdTe) ternary alloys and their effect on the reliability of photodetectors. The MCT hardness versus composition and temperature is estimated. The mechanical properties of HgCdTe crystals and epitaxial structures under compression, bending, and plastic deformation are considered. The model dependences of the activation energy on the effective stress and temperature are presented for two MCT compositions (Hg<sub>0.8</sub>Cd<sub>0.2</sub>Te and Hg<sub>0.34</sub>Cd<sub>0.66</sub>Te). Activation energies of 1.1 eV for Hg<sub>0.8</sub>Cd<sub>0.2</sub>Te and 1.6 eV for Hg<sub>0.34</sub>Cd<sub>0.66</sub>Te are determined using theoretical and experimental results.</p>

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Effect of Mechanical Properties of HgCdTe Solid Alloys on Reliability of Photodetectors (a Review)

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • N. I. Iakovleva,
  • K. O. Boltar,
  • P. V. Vlasov,
  • I. N. Miroshnikova,
  • V. S. Rudnevsky

摘要

Abstract

The review presents an analysis of the micro- and nanohardness of crystals and epitaxial structures based on mercury–cadmium–telluride (MCT, HgCdTe) ternary alloys and their effect on the reliability of photodetectors. The MCT hardness versus composition and temperature is estimated. The mechanical properties of HgCdTe crystals and epitaxial structures under compression, bending, and plastic deformation are considered. The model dependences of the activation energy on the effective stress and temperature are presented for two MCT compositions (Hg0.8Cd0.2Te and Hg0.34Cd0.66Te). Activation energies of 1.1 eV for Hg0.8Cd0.2Te and 1.6 eV for Hg0.34Cd0.66Te are determined using theoretical and experimental results.