Devising a technique to improve the efficiency of CdS/CdTe/Cu/Au solar cells intended for use as a backup power source for the systems of safety and control of objects

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.220489

Keywords:

cadmium telluride, efficiency improvement, backup power, security and control systems, emergency

Abstract

This paper reports a study into the impact of cadmium telluride layer thickness on the effectiveness of the CdS/CdTe/Cu/Au film solar cells. The physical mechanisms have been investigated of charge transfer in the CdS/CdTe/Cu/Au solar cells, which are intended for use as a backup power source for the systems of safety and control of objects. This is important because, despite the growing popularity of solar cell application, the effectiveness of laboratory samples differs greatly from the theoretical maximum. Thus, it has been established that the optimum thickness of the base layer of film CdS/CdTe/Cu/Au SCs is 4 µm. When the thickness of the cadmium telluride layer is reduced, the effectiveness of such an assembly decreases. The decrease in efficiency occurs as a result of reducing the shunting electric resistance, increasing the density of a diode saturation current, as well as consistent electric resistance. With the increase in the thickness of the telluride layer exceeding 4 µm, there is also a decrease in the efficiency of a solar cell due to the reduced shunting resistance and the increased serial electric resistance. The deterioration of the specified light diode characteristics of CdS/CdTe/Cu/Au SCs, which occurs when the thickness of the base layer is reduced by more than 4 µm, is due to the diffusion of copper from the contact to the area of the separating barrier. The deterioration of light diode characteristics when increasing the thickness of the base layer of cadmium telluride is associated with a decrease in the positive effects of "chloride" treatment. The examined physical charge transfer mechanisms in the CdS/CdTe/Cu/Au solar cells have made it possible to establish the height of the rear potential barrier. In the samples studied, the height of the rear potential barrier is 0.3 eV. The existence of such a barrier gives rise to the thermal-emission mechanism of charge transfer in such solar cells when applying a direct offset exceeding 1 V

Author Biographies

Natalya Deyneko, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD, Associate Professor

Department of Special Chemistry and Chemical Engineering

Alexander Zhuravel, Design and Technology Institute of Micrographics Akademika Pidhornoho lane, 1/60, Kharkiv, Ukraine, 61046

Leading Process Engineer

Liudmyla Mikhailova, State Agrarian and Engineering University in Podilia Shevchenka str., 13, Kamianets-Podilsky, Ukraine, 32316

PhD, Professor

Department of Electrical Technology, Electromechanics and Electrotechnics

Elena Naden, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Department of Prevention Activities and Monitoring

Arthur Onyshchenko, National Transport University M. Omelianovycha-Pavlenka str., 1, Kyiv, Ukraine, 01010

Doctor of Technical Sciences, Associate Professor

Department of Bridges and Tunnels

Alexander Savchenko, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD, Senior Researcher

Department of Prevention Activities and Monitoring

Victor Strelets, National University of Civil Defence of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

Doctor of Technical Sciences, Senior Researcher

Scientific Department on the Problems of Civil Defense, Technogenic and Ecological Safety of Research Center

Yevhen Yurevych, Design and Technology Institute of Micrographics Akademika Pidhornoho lane, 1/60, Kharkiv, Ukraine, 61046

Deputy Director

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Published

2020-12-31

How to Cite

Deyneko, N., Zhuravel, A., Mikhailova, L., Naden, E., Onyshchenko, A., Savchenko, A., Strelets, V., & Yurevych, Y. (2020). Devising a technique to improve the efficiency of CdS/CdTe/Cu/Au solar cells intended for use as a backup power source for the systems of safety and control of objects. Eastern-European Journal of Enterprise Technologies, 6(5 (108), 21–27. https://doi.org/10.15587/1729-4061.2020.220489

Issue

Vol. 6 No. 5 (108) (2020): Applied physics

Section

Applied physics

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Copyright (c) 2020 Natalya Deyneko, Alexander Zhuravel, Liudmyla Mikhailova, Elena Naden, Arthur Onyshchenko, Alexander Savchenko, Victor Strelets, Yevhen Yurevych

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