In Situ Reconstructing the Buried Interface for Efficient CsPbI 3 Perovskite Solar Cells
National Laboratory of the Rockies · Chinese Academy of Sciences · +3 more institutions
Abstract
To CsPbI3 perovskite solar cells, defects from buried interfaces and improper energy band alignment can cause severe carrier recombination and hamper further enhancement in efficiency and stability. In this work, we develop an in situ strategy to reconstruct the buried interface for n-i-p typed CsPbI3 solar cells. This strategy is derived from an in situ exchange reaction between 18C6/Cs+ and Pb2+, leading to the formation of 18C6/Pb2+ in the CsPbI3 crystallization process (18C6: 18-crown-6 ether). The as-prepared 18C6/Pb2+ complex acts as a kind of molecular barrier to modify the TiO2/perovskite buried interface and passivate under-coordinated Pb2+ and iodide vacancies. Additionally, free Br– ions can diffuse…
Citation impact
- FWCI
- 27.67
- Percentile
- 100%
- References
- 37
Authors
9- CTChengyu Tan
National Laboratory of the Rockies, Chinese Academy of Sciences, Institute of Physics, University of Chinese Academy of Sciences
- YCYuqi Cui
National Laboratory of the Rockies, Chinese Academy of Sciences, Institute of Physics
- RZRui Zhang
National Laboratory of the Rockies, Chinese Academy of Sciences, Institute of Physics
- YLYiming Li
National Laboratory of the Rockies, Chinese Academy of Sciences, Institute of Physics
- HWHuijue Wu
National Laboratory of the Rockies, Chinese Academy of Sciences, Institute of Physics
Topics & keywords
- Passivation
- Perovskite (structure)
- Solar cell
- Energy conversion efficiency
- Crystallization
- In situ
- Iodide
- Materials science
Funding
- CSCommonwealth Scientific and Industrial Research OrganisationAward: 112111KYSB20210017
- NNNational Natural Science Foundation of ChinaAwards: 52172260, 52227803, 52361145847, 52203368, 52222212, 52072402, 52102332
- CAChinese Academy of SciencesAward: 112111KYSB20210017
- BMBeijing Municipal Natural Science FoundationAward: 2222082