Stabilizing halide perovskite surfaces for solar cell operation with wide-bandgap lead oxysalts
University of North Carolina at Chapel Hill · University of Nebraska–Lincoln · +5 more institutions
Abstract
We show that converting the surfaces of lead halide perovskite to water-insoluble lead (II) oxysalt through reaction with sulfate or phosphate ions can effectively stabilize the perovskite surface and bulk material. These capping lead oxysalt thin layers enhance the water resistance of the perovskite films by forming strong chemical bonds. The wide-bandgap lead oxysalt layers also reduce the defect density on the perovskite surfaces by passivating undercoordinated surface lead centers, which are defect-nucleating sites. Formation of the lead oxysalt layer increases the carrier recombination lifetime and boosts the efficiency of the solar cells to 21.1%. Encapsulated devices stabilized by the lead oxysalt…
Citation impact
- FWCI
- 67.31
- Percentile
- 100%
- References
- 31
Authors
12- SYShuang YangCorresponding
University of North Carolina at Chapel Hill, University of Nebraska–Lincoln, Applied Physical Sciences (United States)
- SCShangshang ChenCorresponding
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
- EMEdoardo Mosconi
Institute of Molecular Science and Technologies
- YFYanjun Fang
University of North Carolina at Chapel Hill, University of Nebraska–Lincoln, Applied Physical Sciences (United States)
- XXXun Xiao
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
Topics & keywords
- Perovskite (structure)
- Halide
- Degradation (telecommunications)
- Materials science
- Solar cell
- Energy conversion efficiency
- Band gap
- Irradiation
- Affordable and clean energy