STUDY OF THE INFLUENCE OF DEEP LEVELS ON THE PHOTOELECTRIC PARAMETERS OF p-CdTe – n-CdS AND p-CdTe – n-CdSe HETEROSTRUCTURES
DOI:
https://doi.org/10.56292/SJFSU/vol31_iss5/a161Keywords:
heterojunctions, solar cells, p CdTe – n CdS, photosensitivity, polycrystalline film, recombination centers, spectral sensitivity.Abstract
The paper studies the influence of deep impurity levels on the photoelectric parameters of p-CdTe/n-CdS and p-CdTe/n-CdSe film heterostructures. The mechanisms of deep level formation during deposition and subsequent thermal treatment of layers are considered. It is established that the presence of deep levels significantly affects the processes of charge carrier recombination, reduces the lifetime of minority carriers and leads to a change in the spectral sensitivity of the structures. An analysis of the dependence of the main photoelectric characteristics - photocurrent, photovoltage and quantum yield - on the density and energy position of deep levels is given. The obtained results allow us to develop recommendations for optimizing the process parameters for creating highly efficient photoelectronic devices and solar cells based on p-CdTe/n-CdS and p-CdTe/n-CdSe heterostructures. It is determined that deep impurity levels in CdTe, the activation energy of which is equal to Ec=1.15 eV.
References
1. Kuddus, Abdul & Ismail, Abu Bakar Md & Hossain, Jaker. (2021). Design of a highly efficient CdTe-based dual-heterojunction solar cell with 44% predicted efficiency. Solar Energy. 221. 488-501. 10.1016/j.solener.2021.04.062. https://www.sciencedirect.com/science/article/pii/S0038092X21003625
2. Bing Ren, Jijun Zhang, Meiyong Liao, Jian Huang, Liwen Sang, Yasuo Koide, and Linjun Wang. High-performance visible to near-infrared photodetectors by using (Cd,Zn)Te single crystal. Vol. 27, No. 6 | 18 Mar 2019 | OPTICS EXPRESS 8935/ https://opg.optica.org/oe/fulltext.cfm?uri=oe-27-6-8935&id=407310
3. Dirin D.N. Synthesis and optical properties of colloidal CdTe/CdSe and CdTe/CdS nanocrystals based on CdTe tetrapods. / "Fundamental materials science and nanomaterials" / Lomonosov Moscow State University, Faculty of Materials Sciences, Moscow, Russia 2009.
http://www.lssm.inorg.chem.msu.ru/pDirin.html
4. S. Otajonov, T. Ahmedov, Ya. Usmonov, M. Khalilov, N. Yunusov. Optical properties of polycrystalline films of lead telluride with distributed stoichiometry // Journal of Physics: Conference Series 1889 (2), 022052.
5. E.Gaubas, T. Ceponis, D. Dobrovolskas, J. Mickevicius, N. Alimov, S. Otajonov. Study of polycrystalline CdTe films by contact and contactless pulsed photo-ionization spectroscopy // J. Thin Solid films 660 june 2018 pp. 231-235. Doi
6. Roman B. Vasilev, Dmitriy N. Dirin, Аleksandr Mixaylovich Gaskov. Effect of Temperature on the Growth of Colloidal CdTe Nanotetrapods. Mendeleev messages. Volume 19 Issue 3, May–June 2009, pages 126–127.
7. T. Okamoto, A. Yamada, M. Konagai, Optical and electrical characterizations of highly efficient CdTe thin film solar cells, Thin Solid Films 387 (2001) 6-10.
8. NE Alimov, JV Vaitkus, SM Otajonov, K Botirov. Investigation of the surface recombination rate in polycrystalline films from the A6B6 compound by the MW-PC method. Journal of Physics: Conference Series 2388 (1), 012006. DOI 10.1088/1742-6596/2388/1/012006
9. T Akhmedov, SM Otazhonov, MM Khalilov. INVESTIGATION OF THE FREQUENCY DEPENDENCE OF THE RESISTANCE OF PbTe FILMS. International Journal of Advance Scientific Research 2 (12), 149-155.
10. SM Otajonov, RN Ergashev. Photoelectric properties of solar cells based on pCdTe-nCdS and pCdTe-nCdSe heterostructures. Journal of Physics: Conference Series 2388 (1), 012062. DOI 10.1088/1742-6596/2388/1/012062
11. SM Otazhonov, RN Ergashev. Influence of thickness and temperature on photoelectric properties of p-CdTe-nCdS and pCdTe-CdSe heterostructures. Journal of Physics: Conference Series 2388 (1), 012001. DOI 10.1088/1742-6596/2388/1/012001
12. Sergei S. Bubenov, Alexander A. Vinokurov, Dulat H. Daurenbekov, Sergey G. Dorofeev, Kirill A. Cherednichenko, Asset Zh. Kainarbay, Turlybek N. Nurakhmetov. Chelation of Zn Cations as a Method for Their Replacement by Mn, Fe, Co in ZnSe Nanocrystals. Physica status solidi 2023. 19 October 2022 https://doi.org/10.1002/pssa.202200556
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Scientific journal of the Fergana State University
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
How to Cite
Most read articles by the same author(s)
- Отажонов Салим Мадрахимович, Эргашев Равшанбек Назирович, Ботиров Кадир Абдуллаевич, Нажмиддинова Дилдорахон Халиловна, OPTICAL PROPERTIES AND X-RAY STRUCTURAL ANALYSIS OF CdTe THIN FILMS WITH DEEP IMPURITY LEVELS , Scientific journal of the Fergana State University: No. 6 (2025): FarDU. Ilmiy xabarlar jurnali (Aniq fanlar)