Citation

Hasan Tanim, Md. Mehedi and Siddika, Mst. Aysha and Ali, Md. Feroz and Sheikh, Md. Rafiqul Islam and Al Mamun, Abdullah Sarwar and Hossen, Md. Jakir (2025) Next-generation lead-free solar cells with MASnBr3/ZnSnN2 dual absorbers for high efficiency. Frontiers in Materials, 12. ISSN 2296-8016

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Abstract

This study presents a next-generation lead-free perovskite solar cell (PVSC) architecture employing a dual-absorber design using MASnBr3 and ZnSnN2 to enhance photovoltaic performance while ensuring environmental sustainability. The proposed structure—FTO/n-ZnO/p-MASnBr3/p-+ZnSnN2/p-++CNTS/Au—was simulated and optimized using SCAPS-1D software. Extensive material and structural optimization was conducted, including selection of electron and hole transport layers as well as tuning absorber thickness, doping concentration, and defect density. The dual-absorber configuration leverages the complementary optical properties of MASnBr3 (bandgap: 1.3 eV) and ZnSnN2 (bandgap: 1.5 eV), enhancing spectral absorption and carrier separation. Optimization of interface properties, series/shunt resistance, and operating temperature further improved the device’s efficiency and stability. The final optimized structure achieved a power conversion efficiency (PCE) of 35.87%, with open-circuit voltage (VOC) of 1.17 V, short-circuit current density (JSC) of 34.39 mA/cm2, and fill factor (FF) of 89.01%. Quantum efficiency analysis confirmed near-unity photon-to-charge conversion across the visible spectrum. This work demonstrates the viability of combining lead-free perovskites with nitride absorbers for high-efficiency, eco-friendly solar technologies and provides a scalable pathway for future experimental validation and commercialization of sustainable photovoltaic systems.

Item Type:	Article
Uncontrolled Keywords:	Lead-free perovskite solar cells, dual absorber architecture, MASnBr3, ZnSnN2, SCAPS1D simulation
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800-8360 Electronics
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	30 Sep 2025 07:14
Last Modified:	06 Oct 2025 01:50
URII:	http://shdl.mmu.edu.my/id/eprint/14591

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