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Studying the Structure and Lifetime of Photogenerated Current Carriers of Cadmium Telluride-Based Solid Solutions in CdTe–Sb2Te3 and CdTe–CdSb Systems

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Abstract

The structure of CdTe–Sb2Te3 and CdTe–CdSb solid solutions (0–1019 Sb atoms cm–3) prepared by multistage solid-state synthesis from the elements has been studied. It has been found that the introduction of antimony Sb3+ and Sb3− into cadmium telluride leads to a decrease and increase in the unit cell volume, respectively. It has been shown that the crystal lattice parameters gradually change up to an antimony concentration of 1018 atoms cm–3 in both systems, whereas an increase in the antimony concentration above 1018 Sb atoms cm–3 is characterized by an abrupt change in the unit cell volume due to a significant change in the structure. The decay kinetics of current carriers has been studied by the time-resolved microwave photoconductivity method. It has been found that the introduction of antimony into CdTe in a threshold concentration (1018 Sb atoms cm–3) leads to an increase in the lifetime of photogenerated current carriers; this fact can be attributed to the formation of defect associates and the occurrence of a self-compensation process during doping.

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ACKNOWLEDGMENTS

The authors thank D.V. Korchagin and G.F. Shilov for recording the diffraction patterns.

Funding

This work was performed by state assignment no. AAAA-A19-119070790003-7 using the unique research facility: System for photogenerated current carrier lifetime measurements by the microwave photoconductivity method in the 36 GHz frequency range and the equipment of the Shared-Use Analytical Center at the Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences.

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Authors and Affiliations

  1. Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia

    M. V. Gapanovich, E. V. Rabenok, E. N. Koltsov, V. V. Rakitin & D. S. Lutsenko

  2. Faculty of Fundamental Physical and Chemical Engineering, Moscow State University, 119991, Moscow, Russia

    M. V. Gapanovich

  3. Moscow Institute of Physics and Technology, 141701, Dolgoprudny, Moscow oblast, Russia

    E. N. Koltsov

  4. Russian–Armenian University, 0051, Yerevan, Armenia

    V. A. Gevorgyan

  5. Faculty of Chemistry, Moscow State University, 119991, Moscow, Russia

    D. S. Lutsenko

Authors
  1. M. V. Gapanovich
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  2. E. V. Rabenok
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  3. E. N. Koltsov
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  4. V. V. Rakitin
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  5. V. A. Gevorgyan
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  6. D. S. Lutsenko
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Correspondence to M. V. Gapanovich.

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Translated by M. Timoshinina

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Gapanovich, M.V., Rabenok, E.V., Koltsov, E.N. et al. Studying the Structure and Lifetime of Photogenerated Current Carriers of Cadmium Telluride-Based Solid Solutions in CdTe–Sb2Te3 and CdTe–CdSb Systems. High Energy Chem 58, 202–207 (2024). https://doi.org/10.1134/S0018143924020048

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