Dual Coordination of Ti and Pb Using Bilinkable Ligands Improves Perovskite Solar Cell Performance and Stability
Abstract
Charge recombination due to interfacial defects is an important source of loss in perovskite solar cells. Here, a two‐sided passivation strategy is implemented by incorporating a bilinker molecule, thiophene‐based carboxylic acid (TCA), which passivates defects on both the perovskite side and the TiO2 side of the electron‐extracting heterojunction in perovskite solar cells. Density functional theory and ultrafast charge dynamics reveal a 50% reduction in charge recombination at this interface. Perovskite solar cells made using TCA‐passivated heterojunctions achieve a power conversion efficiency of 21.2% compared to 19.8% for control cells. The TCA‐containing cells retain 96% of initial efficiency following 50 h of UV‐filtered MPP testing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 06, 2020
- Source ID
- 10.1002/adfm.202005155
Entities
People
- Chen Dong
- Edward H. Sargent
- Furui Tan
- Gentian Yue
- Hairen Tan
- James Z. Fan
- Junhwan Kim
- Makhsud I Saidaminov
- Rong Liu
- Shengchun Qu
- Shengjun Li
- Shizhong Yue
- Weifeng Zhang
- Xiaodong Hu
- Xiaotian Wang
- Yueyue Gao
- Yuhang Wang
- Zhanguo Wang
- Zhijie Wang
- Zhitao Shen
- Ziru Huang
Organizations
- China Scholarship Council
- Dutch Research Council
- Government of Canada
- Hefei University of Technology
- Henan University
- Korea Institute of Science and Technology
- Nanjing University
- National Natural Science Foundation of China
- Natural Science Foundation of Henan Province
- Natural Sciences and Engineering Research Council
- Office of Naval Research
- Ontario Research Foundation
- Program 973
- University of Toronto