Journal
JOULE
Volume 6, Issue 7, Pages 1672-1688Publisher
CELL PRESS
DOI: 10.1016/j.joule.2022.05.013
Keywords
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Funding
- National Research Foundation of Korea (NRF) under the Ministry of Science, ICT & Future Planning (Basic Science Research Program) [2021R1A5A6002853]
- Nano-Material Technology Development Program [2021M3H4A1A03076642]
- Ministry of Trade, Industry and Energy, Republic of Korea (New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning [KETEP]) [20183010013820]
- Korea goverment (MSIT) [2022R1C1C2008126]
- U.S. Department of Energy (DOE) [DE-AC36-08GO28308]
- Alliance for Sustainable Energy, LLC
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy
- U.S. Department of Energy, Solar Energy Technologies Office
- NREL Transformational Laboratory Directed Research and Development Program
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Surface engineering of the CsPbI3 layer with oxidized Ti3C2Tx MXene nanoplates via spray coatings resulted in highly efficient and stable p-i-n-structured CsPbI3 perovskite solar cells. The addition of OMXene provided a physical barrier against moisture and improved charge separation at the perovskite-electron transporting layer interface, leading to the demonstration of efficient CsPbI3/OMXene-based p-i-n devices with good stability.
All-inorganic CsPbI3 perovskite has a near-ideal band gap, high ther-mal stability, and simple material composition, thus presenting a promising option for developing perovskite/Si tandem solar cells. However, CsPbI3 undergoes a rapid phase transition under exposure to moisture and exhibits a significant performance gap relative to other perovskite compounds, particularly in the p-i-n structure favored for perovskite/Si tandems. Here, we demonstrate highly efficient and stable p-i-n-structured CsPbI3 perovskite solar cells by surface engineering the CsPbI3 layer with oxidized Ti3C2Tx MXene (OMXene) nanoplates via spray coatings. OMXene provides a phys-ical barrier against moisture and improves charge separation at the perovskite-electron transporting layer interface via an enhanced electric field. Consequently, we demonstrated CsPbI3/OMXene-based p-i-n devices with efficiencies of 19.69% for 0.096-cm2 cells and 14.64% for 25-cm2 minimodules. The encapsulated minimodule showed good stability, retaining -85% of the initial efficiency under simultaneous damp heat (85 degrees C/85% relative humidity) and 1-sun light soaking for over 1,000 h.
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