Development of a method for obtaining a CdS/CdTe/Cu/Au module on a flexible substrate designed for backup supplying systems prevention of emergency situations

Natalia Deyneko,Roman Shevchenko,Andrei Pruskyi,Igor Kryvulkin,Gennady Kamyshentsev,Victor Strelets,Mykola Matiushenko,Alexander Soshinsky,Oleg Myroshnyk,Sergey Yeremenko

doi:10.15587/1729-4061.2021.225694

Abstract

The study of methods for obtaining base layers of cadmium telluride for the creation of efficient solar cells on a flexible substrate, intended for backup power supply of security systems and facility control. Considering that the polyamide film is stable up to a temperature of 450 °С, the formation of the base layers of solar cells based on cadmium telluride on flexible polyamide substrates was carried out by the method of DC magnetron sputtering. Using the chosen method, experimental samples of micromodules on a flexible substrate with series-connected solar cells based on CdS/CdTe/Cu/Au were obtained. To understand the effect of the failure of one or more solar cells on the efficiency of the entire micromodule during operation, an analysis of the initial parameters and light diode characteristics of individual solar cells of micromodules was carried out. The design of the micromodules, in which the solar cells were connected in series, made it possible to separately measure their output parameters. It was found that the creation of a Cu/Au rear tunnel contact made it possible to obtain high values of the output parameters for individual solar cells, but the micromodule contains a limitation by a shunted solar cell. However, the greatest role in reducing the efficiency of the entire micromodule is played by ineffective absorption of radiation when passing through the polyamide film, which led to a decrease in the efficiency of the entire micromodule, in which there is a shunted element, to 3.9 %. The maximum efficiency of the obtained samples of micromodules was 5.3 %

Highlights

The analysis of emergency situations shows that one of the problems of localization and elimination of consequences is a power outage due to damage to power lines
In the case of creating film solar cells based on cadmium telluride (CdTe) on flexible substrates, the limitation of the efficiency of device structures is due to two groups of factors: firstly, it is the difficulty in creating a high-quality rear contact, and secondly, the significant absorption of the visible part of the spectrum when passing through the substrate
The initial parameters of the micromodules included in the ITO/CdS/CdTe/Cu/Au module with series connection of elements were obtained by analytical processing of the light CVC (Table 1)

Summary

Introduction

The analysis of emergency situations shows that one of the problems of localization and elimination of consequences is a power outage due to damage to power lines. As a rule, such security systems have a backup power source in case of an emergency power outage in the network, but, in most cases, its charge lasts no more than 24 hours [1] In this case, the use of solar cells becomes relevant. An urgent topic is the development of approaches to the use of photovoltaic cells based on CdTe for booking a security and control system in the event of a prolonged lack of electricity supply from engineering networks. In such a case, using solar cells as a portable power generator requires a transition from frame panels to flexible solar cells that can be placed on any surface. The technology of creating flexible efficient solar cells from the point of view of industrial production requires further research

Literature review and problem statement

The aim and objectives of research

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Conclusions