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Performance evaluation of WS2 as buffer and Sb2S3 as HTL in CZTS solar cell by numerical simulation
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  • Md. Nur Hossain Riyad,
  • Adil Sunny,
  • Marzia Khatun,
  • Sabrina Rahman,
  • Sheikh Rashel Al Ahmed
Md. Nur Hossain Riyad
Pabna University of Science and Technology

Corresponding Author:[email protected]

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Adil Sunny
Pabna University of Science and Technology
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Marzia Khatun
Pabna University of Science and Technology
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Sabrina Rahman
Pabna University of Science and Technology
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Sheikh Rashel Al Ahmed
Pabna University of Science and Technology
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This study reports on performance enhancement in a solar cell introducing Sb2S3 as hole transport layer (HTL)along WS2 as buffer layer. We have investigated photovoltaic (PV) characteristics by utilizing SCAPS-1D. A comparative observation on PV performances of conventional CZTS/CdS with proposed CZTS/WS2 and Ni/Sb2S3/CZTS/WS2 /FTO/Al solar cells is presented. It is revealed that “spike like” band structure at CZTS/WS2 interface having smaller conduction band offset makes it potential alternative to commonly used CdS buffer. This study also evaluates that Sb2S3 as an HTL proposed at back of CZTS enhances performances by reducing carrier recombination at back interface with appropriate band alignment. The impacts of thickness, carrier concentration of different layers, and bulk defect density in CZTS as well as defects at interfaces on performances are analyzed. The influences of temperature, work function as well as cell resistances are also explored. Optimum absorber thickness of 1.0 µm along doping of 10 17 cm-3 is selected. A maximum efficiency of 30.63% is achieved for the optimized CZTS cell. Therefore, these results suggest that Sb2S3 as HTLand WS2 as buffer layer can be employed effectively to develop highly efficient and low-cost CZTS solar cells.
25 Apr 2022Submitted to Engineering Reports
27 Apr 2022Submission Checks Completed
27 Apr 2022Assigned to Editor
02 May 2022Reviewer(s) Assigned
23 Sep 20221st Revision Received
24 Sep 2022Submission Checks Completed
24 Sep 2022Assigned to Editor
29 Sep 2022Reviewer(s) Assigned
30 Oct 2022Review(s) Completed, Editorial Evaluation Pending
02 Nov 2022Editorial Decision: Accept