Buried Interfaces in Halide Perovskite Photovoltaics
Abstract
Understanding the fundamental properties of buried interfaces in perovskite photovoltaics is of paramount importance to the enhancement of device efficiency and stability. Nevertheless, accessing buried interfaces poses a sizeable challenge because of their non‐exposed feature. Herein, the mystery of the buried interface in full device stacks is deciphered by combining advanced in situ spectroscopy techniques with a facile lift‐off strategy. By establishing the microstructure–property relations, the basic losses at the contact interfaces are systematically presented, and it is found that the buried interface losses induced by both the sub‐microscale extended imperfections and lead‐halide inhomogeneities are major roadblocks toward improvement of device performance. The losses can be considerably mitigated by the use of a passivation‐molecule‐assisted microstructural reconstruction, which unlocks the full potential for improving device performance. The findings open a new avenue to understanding performance losses and thus the design of new passivation strategies to remove imperfections at the top surfaces and buried interfaces of perovskite photovoltaics, resulting in substantial enhancement in device performance.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 04, 2021
- Source ID
- 10.1002/adma.202006435
Entities
People
- Deying Luo
- Guosheng Shao
- Hongyu Yu
- Jiang Wu
- Lichen Zhao
- Miguel Anaya
- Q. Hu
- Qihuang Gong
- Rui Su
- Rui Zhu
- Samuel Stranks
- Thomas Paul Russell
- Wei Huang
- Wei Zhang
- Wenqiang Yang
- Xiaoyu Yang
- Yongguang Tu
- Yonglong Shen
- Yuren Xiang
- Yu‐hsien Chiang
Organizations
- China Postdoctoral Science Foundation
- Engineering and Physical Sciences Research Council
- Lawrence Berkeley National Laboratory
- National Natural Science Foundation of China
- Office of Basic Energy Sciences
- Office of Naval Research
- Office of Science
- Peking University
- Program 973
- Royal Society
- Shanxi University
- Tata Sons
- United States Department of Energy
- University of Cambridge
- University of Massachusetts
- University of Surrey
- Zhengzhou University