Stabilizing halide perovskite surfaces for solar cell operation with wide-bandgap lead oxysalts
Abstract
The stability of organic-inorganic perovskite solar cells is limited by degradation from oxygen and water. Yang et al. show that in situ reaction of perovskites with sulfate or phosphate ions can create thin, strongly bonded lead oxysalt layers that protect defect sites. This layer also boosts charge carrier lifetimes that lead to a power conversion efficiency of more than 20%. Encapsulated devices maintained about 97% of this efficiency with simulated solar irradiation for nearly 2 months at a realistic operation temperature of 65°C.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 02, 2019
- Source ID
- 10.1126/science.aax3294
Entities
People
- Congcong Wang
- Edoardo Mosconi
- Filippo De Angelis
- Jingjing Zhao
- Jinsong Huang
- Shangshang Chen
- Shuang Yang
- Xun Xiao
- Yanjun Fang
- Yongli Gao
- Yu Zhou
- Zhenhua Yu
Organizations
- Air Force Office of Scientific Research
- Consiglio Nazionale delle Ricerche
- National Science Foundation
- Office of Naval Research
- University of Nebraska–Lincoln
- University of North Carolina at Chapel Hill
- University of Perugia
- University of Rochester