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Low-temperature solution-processed tin oxide as an alternative electron transporting layer for efficient perovskite
Weijun Ke1,2, Guojia Fang1, Qin Liu1
1†Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China.
Journal of the American Chemical Society
|May 20, 2015
Summary
Low-temperature processed tin oxide (SnO2) is a viable alternative electron transporting layer (ETL) for efficient perovskite solar cells. This advancement enables cost-effective, roll-to-roll manufacturing of flexible solar cells.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- High-efficiency perovskite solar cells commonly utilize high-temperature processed titanium dioxide (TiO2) as electron transporting layers (ETLs).
- This processing requirement limits scalability and increases manufacturing costs for perovskite solar cells.
Purpose of the Study:
- To investigate the potential of low-temperature solution-processed nanocrystalline tin oxide (SnO2) as an alternative ETL material for perovskite solar cells.
- To evaluate the performance and properties of SnO2 ETLs in achieving high-efficiency solar cells.
Main Methods:
- Fabrication of perovskite solar cells using low-temperature solution-processed nanocrystalline SnO2 as the ETL.
- Characterization of the SnO2 films and the resulting solar cell performance, including efficiency measurements from reverse and forward voltage scans.
Main Results:
- Achieved an average power conversion efficiency of 16.02% for planar perovskite solar cells utilizing the SnO2 ETL.
- Demonstrated excellent properties of nanocrystalline SnO2 films, including good antireflection, suitable band edge positions, and high electron mobility.
Conclusions:
- Low-temperature solution-processed nanocrystalline SnO2 is an effective alternative ETL for high-efficiency perovskite solar cells.
- The developed process is compatible with roll-to-roll manufacturing, paving the way for low-cost, flexible perovskite solar cells.
