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Towards Highly Efficient Cesium Titanium Halide Based Lead-Free Double Perovskites Solar Cell by Optimizing the
Syed Abdul Moiz1, Saud Abdulaziz Albadwani1, Mohammed Saleh Alshaikh1
1Device Simulation Laboratory, Department of Electrical Engineering, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah 21955, Saudi Arabia.
Nanomaterials (Basel, Switzerland)
|October 14, 2022
Summary
This study explores lead-free perovskite solar cells using cesium titanium halides as a safer alternative to lead-based photovoltaics. The optimized ITO/Nb device achieved over 18.5% power conversion efficiency, demonstrating significant potential.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Lead halide perovskites show promise for solar cells but raise toxicity concerns.
- Vacancy-ordered double perovskites, specifically cesium titanium halides, are investigated as lead-free alternatives.
- Developing efficient and non-toxic photovoltaic materials is crucial for sustainable energy.
Purpose of the Study:
- To design and compare efficient cesium titanium halide-based solar cells.
- To identify a viable lead-free perovskite solar cell alternative.
- To optimize device parameters for enhanced photovoltaic performance.
Main Methods:
- Simulated and modeled photovoltaic responses of cesium titanium halide solar cells.
- Optimized device layers (hole-transport, electron-transport, and active perovskite) for thickness and doping density.
- Investigated devices using ITO/Nb-2O5 electron transport layer and various cesium titanium halide compositions.
Main Results:
- The ITO/Nb-2O5 device with Cs2TiI6 active layer demonstrated the highest power conversion efficiency, exceeding 18.5%.
- Optimized device parameters significantly influenced photovoltaic performance.
- Cesium titanium halide solar cells show competitive efficiency compared to lead-based counterparts.
Conclusions:
- Cesium titanium halide-based solar cells offer a promising lead-free alternative to traditional perovskite solar cells.
- The optimized ITO/Nb-2O5 device structure provides a pathway towards highly efficient, non-toxic solar energy conversion.
- Further research into vacancy-ordered double perovskites can accelerate the development of sustainable photovoltaics.
