Constructive molecular configurations for surface-defect passivation of perovskite photovoltaics
Abstract
Unproductive charge recombination at surface defects can limit the efficiency of hybrid perovskite solar cells, but these defects can be passivated by the binding of small molecules. Wang et al. studied three such small molecules—theophylline, caffeine, and theobromine—that bear both carbonyl and amino groups. For theophylline, hydrogen bonding of the amino hydrogen to surface iodide optimized the carbonyl interaction with a lead antisite defect and improved the efficiency of a perovskite cell from 21 to 22.6%.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 20, 2019
- Source ID
- 10.1126/science.aay9698
Entities
People
- David P. Fenning
- Guangwei Xu
- Jiahui Zhu
- Jingjing Xue
- Jonathan Lee Yang
- Kai-Li Wang
- Kendall Houk
- Minhuan Wang
- Rui Wang
- Selbi Nuryyeva
- Shaun Tan
- Tianyi Huang
- Yang Yang
- Yanqi Luo
- Yepin Zhao
- Zhao-Kui Wang
- İlhan Yavuz
Organizations
- California Energy Commission
- Marmara University
- National Natural Science Foundation of China
- National Science Foundation
- Office of Naval Research
- United States Department of Energy
- University of California, Los Angeles
- University of California, San Diego
- Westlake University