article · Semiconductor Science and Technology
This research focuses on improving the efficiency of copper zinc tin sulfide (CZTS) thin-film solar cells by eliminating toxic cadmium sulfide buffer layers. Using SCAPS-1D simulation software alongside experimental material properties, an alternative buffer layer of zinc tin oxide (ZTO) was examined. The investigation assessed how varying the thickness, doping density, and defect density of the CZTS layer affected overall device performance, initially reaching a baseline efficiency of 14.76%. To further curb charge carrier recombination at the back metal contact, several inorganic back surface field (BSF) materials were tested, namely CuO, Cu2O, MoS2, and MoSe2. Integrating a Cu2O back surface field layer increased the projected solar cell efficiency to 27%. The evaluation also incorporated the influence of operational temperature and parasitic resistances on device behaviour.
Traditional thin-film solar cells frequently rely on toxic elements like cadmium. Developing high-performing solar cells with non-toxic, earth-abundant materials addresses both environmental and supply concerns. Simulating methods to reach 27% efficiency provides a practical design route for developing cleaner, higher-yield solar technologies.
The findings are relevant to thin-film photovoltaic manufacturers and solar cell developers seeking non-toxic, cadmium-free cell architectures. As this work relies on one-dimensional numerical simulations calibrated with material property data, it represents early-stage research that requires physical device fabrication and experimental testing before commercial deployment.
AI-generated from the published abstract. Always read the original work before citing.
Abstract Copper zinc tin sulfide (CZTS) thin-film solar cells have garnered significant attention in the solar energy sector. This study aims to enhance the performance of CZTS solar cells by replacing the conventional, toxic CdS buffer layer with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mtext>Z</mml:mtext> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>n</mml:mtext> </mml:mrow> <mml:mrow> <mml:mn>1</mml:mn> <mml:mo>−</mml:mo> <mml:mi>x</mml:mi> </mml:mrow> </mml:msub> </mml:mrow> <mml:mrow> <mml:mtext>S</mml:mtext> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>n</mml:mtext> </mml:mrow> <mml:mi>x</mml:mi> </mml:msub> </mml:mrow> <mml:mi>O</mml:mi> </mml:mrow> </mml:math> (ZTO) for x = 0.2. Utilizing the one-dimensional solar cell capacitance simulator (SCAPS-1D) and informed by experimental data on the physical properties of the solar cell layers, we investigated the effects of thickness, doping density, and defect density of the CZTS absorber layer on the cell’s performance. Initially, an efficiency of 14.76% was achieved. To improve this efficiency, an inorganic back surface field (BSF) layer was incorporated to mitigate charge carrier recombination at the absorber/back contact metal interface. Various materials, including CuO, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mtext>C</mml:mtext> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>u</mml:mtext> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> <mml:mrow> <mml:mtext>O</mml:mtext> </mml:mrow> </mml:mrow> </mml:math> , Mo <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>S</mml:mtext> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:mrow> </mml:math> and Mo <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mtext>S</mml:mtext> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>e</mml:mtext> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:mrow> </mml:math> , were evaluated as potential BSF layers. Comparative analysis indicated that the inclusion of the BSF layer significantly enhances the solar cell efficiency, achieving up to 27% with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mrow> <mml:mtext>C</mml:mtext> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>u</mml:mtext> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> <mml:mrow> <mml:mtext>O</mml:mtext> </mml:mrow> </mml:mrow> </mml:math> as the BSF material. Furthermore, the study included an analysis of temperature effects and parasitic resistances to comprehensively assess the solar cell’s performance.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1088/1361-6641/ad6477
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
