Triple-halide wide–band gap perovskites with suppressed phase segregation for efficient tandems
Abstract
Tandem solar cells can boost solar cell efficiency by using two active layers to absorb the solar spectrum more completely, provided that the two cells are current-matched. Inorganic-organic perovskites tuned to the appropriate wide band gap (∼1.7 electron volts) as top cells that contained iodine and bromine or bromine and chlorine have short carrier diffusion lengths and undergo photo-induced phase segregation. Xu et al. now report a method for incorporating chloride that allows for fabrication of stable triple-halide perovskites with a band gap of 1.67 electron volts. Two-terminal tandem silicon solar cells made with this material had a power conversion efficiency of 27%.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 06, 2020
- Source ID
- 10.1126/science.aaz5074
Entities
People
- Axel F Palmstrom
- Bryon W Larson
- Caleb C Boyd
- Daniel J Witter
- Eli J Wolf
- Jixian Xu
- Joseph J. Berry
- Joseph M. Luther
- Jérémie Werner
- Maikel F A M van Hest
- Michael McGehee
- Ryan France
- Salman Manzoor
- Steve P Harvey
- William Weigand
- Zachary C Holman
- Zhengshan J Yu
Organizations
- Arizona State University
- National Renewable Energy Laboratory
- National Science Foundation
- Office of Naval Research
- Stanford University
- United States Department of Energy
- University of Colorado
- University of Science and Technology of China