Performance Analysis of WSe-based Bifacial Solar Cells with Different Electron Transport and Hole Transport Materials by SCAPS-1D

Overview

Journal Heliyon

Specialty Social Sciences

Date 2022 Jul 8

PMID 35800715

Authors

M Atowar Rahman

Affiliations

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Abstract

In recent years, solar cells made of tungsten diselenide (WSe) have received comprehensive consideration because of their good photoelectric properties. The planar WSe-based heterojunction solar cell with a preliminary device structure of Au/WSe/electron transport layer (ETL)/FTO/Al was designed and investigated numerically by SCAPS-1D. CdS ETL is widely used in thin film solar cells (TFSCs). Due to environmental issues and the low band gap (2.42 eV) of CdS ETL, an alternative to CdS ETL was being explored for WSe solar cells. In this work, the photovoltaic (PV) performance of the WSe-based TFSCs with different ETLs were simulated, analyzed and compared, in an attempt to track down a suitable substitute for the CdS ETL. In addition to CdS ETL, ZnO, TiO and SnO ETLs were independently used to simulate the PV performance of WSe-based TCSCs. In the wake of analyzing the J-V curves of different cell configurations, SnO ETL yielded the best results with PCE of 27.14 % for the single-junction WSe/SnO TFSC. Then, our simulation predicted that the PV performance of the WSe device can be improved significantly by using N doped CuO as a hole transport layer (HTL). The optimized WSe device with SnO ETL and CuO:N HTL showed an improved PCE of 33.84 % with very good performance stability at higher temperature. Furthermore, this article proposes to use the Au/CuO:N/WSe/SnO/FTO/Al heterojunction solar cell in bifacial mode and PV performance of the proposed bifacial device have been also studied using SCAPS-1D. Bifacial WSe device leads to enhanced PV performance with bifaciality factor for PCE is 83.64 %. Bifacial gain of the proposed device under simultaneous irradiation of 1 sun from the front and 20 % of 1 sun from back side is found to be 13.95 %. Our simulation predicts that the proposed WSe bifacial solar cell is capable of converting solar energy into electricity with an efficiency of about 38.38 %.

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