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Numerical optimization of Rb2AuScBr6 and Rb2AuScCl6-based lead-free perovskite solar cells: device engineering and
Md Al-Amin1, A Haque1, S Mahmud1
1Department of Electrical and Electronic Engineering, Jatiya Kabi Kazi Nazrul Islam University (JKKNIU) Mymensingh-2224 Bangladesh shuaib.eee.iu@gmail.com.
RSC Advances
|November 21, 2025
Summary
This study optimizes lead-free perovskite solar cells (PSCs) using Rb2AuScBr6 and Rb2AuScCl6, achieving high power conversion efficiencies (PCEs) up to 27.49%. Optimized parameters enhance performance and stability for practical applications.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) offer high power conversion efficiency (PCE) and tunable properties for next-generation photovoltaics.
- Developing efficient and stable lead-free PSCs is crucial for sustainable energy solutions.
Purpose of the Study:
- To numerically optimize Rb2AuScBr6 and Rb2AuScCl6-based PSCs.
- To investigate the impact of electron transport layers (ETLs) and device parameters on PSC performance.
Main Methods:
- Numerical optimization of PSC device configurations.
- Systematic variation of perovskite layer thickness, defect density, ETL, and other critical parameters.
- Analysis of electron affinity, resistance, and operational temperature effects.
Main Results:
- A PCE of 27.49% was achieved for an ITO/TiO2/Rb2AuScBr6/CBTS/Ni configuration.
- A PCE of 22.41% was achieved for an ITO/WS2/Rb2AuScCl6/CBTS/Ni configuration.
- Increased perovskite thickness, reduced defect density, and optimized ETLs significantly improved device performance and stability.
Conclusions:
- Rb2AuScBr6 and Rb2AuScCl6 are promising lead-free materials for efficient and stable PSCs.
- Numerical optimization provides a pathway for enhanced device engineering and practical PSC applications.
- Further experimental validation is encouraged to realize the full potential of these perovskite materials.
