Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems
University of Science and Technology of China · National Laboratory of the Rockies · +3 more institutions
Abstract
Wide-band gap metal halide perovskites are promising semiconductors to pair with silicon in tandem solar cells to pursue the goal of achieving power conversion efficiency (PCE) greater than 30% at low cost. However, wide-band gap perovskite solar cells have been fundamentally limited by photoinduced phase segregation and low open-circuit voltage. We report efficient 1.67-electron volt wide-band gap perovskite top cells using triple-halide alloys (chlorine, bromine, iodine) to tailor the band gap and stabilize the semiconductor under illumination. We show a factor of 2 increase in photocarrier lifetime and charge-carrier mobility that resulted from enhancing the solubility of chlorine by replacing some of the…
Citation impact
- FWCI
- 68.35
- Percentile
- 100%
- References
- 81
Authors
17- JXJixian XuCorresponding
University of Science and Technology of China, National Laboratory of the Rockies, University of Colorado Boulder
- CCCaleb C. BoydCorresponding
National Laboratory of the Rockies, Stanford University
- ZJZhengshan J. Yu
Arizona State University
- AFAxel F. Palmstrom
National Laboratory of the Rockies
- DJDaniel J. Witter
National Laboratory of the Rockies, University of Colorado Boulder
Topics & keywords
- Halide
- Tandem
- Bromine
- Band gap
- Energy conversion efficiency
- Optoelectronics
- Solar cell
- Chlorine
- Affordable and clean energy