ORIGINAL ARTICLE
Comprehensive Numerical Analysis of High Efficient Lead-Free CH3NH3SnI3 based Perovskite Solar Cell
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1
Electrical and Electronic Engineering, Chittagong University of Engineering & Technology (CUET), Bangladesh
2
Institute of Energy Technology, Chittagong University of Engineering & Technology (CUET), Bangladesh
Submission date: 2025-06-01
Acceptance date: 2025-07-07
Publication date: 2025-08-19
Journal of Undergraduate Research International 2025;1(1):123-131
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ABSTRACT
Perovskite solar cells (PSCs) have been among the most promising highly efficient next-generation photovoltaic devices with bandgap tunability and low production cost. However, lead toxicity, architectural limitations, along with defect-induced recombination hinder their commercialization. To address these limitations, this study investigates CH3NH3SnI3 as a non-toxic absorber in an FTO/WSe2/CH3NH3SnI3/NiO/Au device architecture. Through systematic numerical simulations using SCAPS-1D, the key design parameters—layer thicknesses, doping densities and defect concentrations—are carefully optimized. The resulting device structure shows a high power conversion efficiency of 34.74%, with Voc of 1.1084 V, Jsc of 36.7788 mA/cm2, fill factor of 85.22% and peak quantum efficiency of 99.95% at 390 nm wavelength under AM 1.5G illumination. Sensitivity analysis reveals that both bulk (Nt>1014 cm-3) and interface (Nint>1017 cm-3) defects drastically degrade the performance, particularly at the CH3NH3SnI3/WSe2 interface. These findings have significant implications for the design principles required for high-efficiency lead-free PSCs.
ABBREVIATIONS
Perovskite solar cells (PSCs)
ACKNOWLEDGEMENTS
The authors acknowledge the use of the SCAPS-1D simulation software in this study and sincerely thank Dr. Marc Burgelman of Ghent University, Belgium, for his generous provision of access to this valuable tool for the broader scientific community.
FUNDING
This study was conducted independently and did not receive any external funding.
CONFLICT OF INTEREST
The authors declare no conflict of interest.
PEER REVIEW INFORMATION
Article has been screened for originality
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