Strong-bonding hole-transport layers reduce ultraviolet degradation of perovskite solar cells
University of North Carolina at Chapel Hill · Applied Physical Sciences (United States) · +4 more institutions
Abstract
The light-emitting diodes (LEDs) used in indoor testing of perovskite solar cells do not expose them to the levels of ultraviolet (UV) radiation that they would receive in actual outdoor use. We report degradation mechanisms of p-i-n-structured perovskite solar cells under unfiltered sunlight and with LEDs. Weak chemical bonding between perovskites and polymer hole-transporting materials (HTMs) and transparent conducting oxides (TCOs) dominate the accelerated A-site cation migration, rather than direct degradation of HTMs. An aromatic phosphonic acid, [2-(9-ethyl-9H-carbazol-3-yl)ethyl]phosphonic acid (EtCz3EPA), enhanced bonding at the perovskite/HTM/TCO region with a phosphonic acid group bonded to TCOs and…
Citation impact
- FWCI
- 42.97
- Percentile
- 100%
- References
- 40
Authors
24- CFChengbin Fei
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
- AKAnastasia Kuvayskaya
Colorado School of Mines
- XSXiaoqiang Shi
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
- MWMengru Wang
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
- ZSZhifang Shi
University of North Carolina at Chapel Hill, Applied Physical Sciences (United States)
Topics & keywords
- Degradation (telecommunications)
- Ultraviolet
- Perovskite (structure)
- Materials science
- Optoelectronics
- Environmental science
- Chemistry
- Chemical engineering