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ARTICLE

High-Efficiency Double-Heterojunction Based Dual-Absorber Perovskite Solar Cell via Numerical Optimization

Soheib Dakhelullah Alsahafi^*

Department of Physics, Aljamoum University College, Umm Al-Qura University, Makkah, Saudi Arabia

* Corresponding Author: Soheib Dakhelullah Alsahafi. Email:

Chalcogenide Letters 2026, 23(3), 2 https://doi.org/10.32604/cl.2026.077336

Received 07 December 2025; Accepted 25 February 2026; Issue published 03 April 2026

Abstract

In this study, a novel double-heterojunction perovskite solar cell (DHPSC) with the following structure: FTO/ZnO/CH₃NH₃PbI_3−xCl_x/CH₃NH₃SnI₃/p⁺⁺ZnTe/Au was designed. It was optimized using the wxAMPS simulation software. A systematic parametric analysis was performed to investigate the influence of electron transport layer (ETL) ZnO and hole transport layer (HTL) thicknesses on photovoltaic performance. That includes short-circuit current density (J_sc), open-circuit voltage (V_oc), fill factor (FF), and power conversion efficiency (η). The results indicate that once a minimum ZnO thickness is achieved, further increases have a negligible effect on performance. Whereas variations in ZnTe thickness markedly influence V_oc and η. The optimal configuration obtained, comprising a FTO (200 nm)/ZnO (600 nm)/CH₃NH₃PbI_3−xCl_x (800 nm)/CH₃NH₃SnI₃ (800 nm)/ZnTe (350 nm), achieved a V_oc of 1.996 V, J_sc of 20.61 mA/cm², FF of 93.11%, and 38.24%. Quantum efficiency analysis revealed superior spectral response, exceeding 95% across the visible spectrum. These findings demonstrate the potential of a thickness-optimized DHPSC device for achieving high performance, providing a pathway for future experimental validation and fabrication.

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Keywords

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