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High-efficiency and eco-friendly Cs2SnBr6-based perovskite solar cells: optimized device architecture and performance
Optics Express
|July 30, 2025
Summary
This study presents a sustainable, high-efficiency inorganic perovskite solar cell (PSC) using Cs2SnBr6. Simulations show a power conversion efficiency (PCE) of 32.65%, highlighting its potential for eco-friendly solar energy.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) offer high efficiency but often contain hazardous lead.
- Developing sustainable, lead-free alternatives is crucial for next-generation solar technology.
Purpose of the Study:
- To develop a sustainable, high-efficiency inorganic Cs2SnBr6-based PSC.
- To eliminate hazardous materials in PSC fabrication.
- To optimize device architecture and material selection for enhanced performance.
Main Methods:
- Device simulation using SCAPS-1D.
- Comparative analysis of various hole transport layers (HTLs) and electron transport layers (ETLs).
- Evaluation of perovskite layer depth, defect density, and resistance effects.
Main Results:
- The proposed Al/FTO/CdS/Cs2SnBr6/CBTS/Ni device achieved a simulated power conversion efficiency (PCE) of 32.65%.
- Optimized parameters include perovskite thickness (1.0 µm) and ETL/HTL thicknesses (0.05 µm).
- CdS and CBTS were identified as optimal ETL and HTL materials, respectively.
Conclusions:
- Cs2SnBr6-based PSCs demonstrate significant potential for high efficiency and sustainability.
- The developed device architecture offers a promising pathway for environmentally friendly solar energy solutions.
- Cs2SnBr6 is a viable material for next-generation, eco-conscious photovoltaic technologies.
