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C60 as an Efficient n-Type Compact Layer in Perovskite Solar Cells
Konrad Wojciechowski1, Tomas Leijtens1,2, Svetlana Siprova1,3
1†Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom.
The Journal of Physical Chemistry Letters
|August 13, 2015
Summary
Fullerene C60 as an electron selective contact improves perovskite solar cell efficiency and stability. This study investigates hysteresis and charge extraction, offering insights for enhanced device performance.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Organic-inorganic halide perovskite solar cells show rapid advancement.
- Key challenges include anomalous hysteresis and long-term device stability.
Purpose of the Study:
- To investigate the electron selective contact in perovskite solar cells.
- To understand physical processes at the heterojunction.
- To improve device efficiency and stability.
Main Methods:
- Developed perovskite solar cells using fullerene C60 instead of TiO2.
- Employed a regular n-i-p architecture.
- Utilized detailed spectroscopic characterization.
Main Results:
- Achieved efficient perovskite solar cell devices.
- Gained insight into photocurrent hysteresis and charge extraction limitations at the n-type contact.
- Observed preliminary improved long-term performance with an organic charge collection layer.
Conclusions:
- Fullerene C60 is an effective electron selective contact for perovskite solar cells.
- Understanding n-type contact behavior is crucial for mitigating hysteresis.
- Organic charge collection layers show promise for enhancing device longevity.
