Low‐Dimensional Contact Layers for Enhanced Perovskite Photodiodes
Abstract
Controlling defects and energy‐band alignments are of paramount importance to the development of high‐performance perovskite‐based photodiodes. Yet, concurrent improvements in interfacial contacts and defect reduction simply by tailoring bottom contacts have not been investigated. An effective strategy is reported that can simultaneously improve energy‐band alignments and structural defects by introducing low‐dimensional contact (LDC) layers at the bottom interface. It is found that LDC‐based perovskites considerably suppress undesirable structural defects induced by microstrains, resulting in reduced nonradiative recombination centers and improved carrier lifetimes. Additionally, the resulting LDC‐based interface structures help block minority carrier injection from the electrodes by forming built‐in electric fields. As a consequence, LDC‐based perovskite photodiodes showed improved light detection capabilities. The result opens an avenue to yield highly efficient photodiodes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 27, 2020
- Source ID
- 10.1002/adfm.202001692
Entities
People
- Beng Xiang
- Deying Luo
- Hang Zhou
- Hongyu Yu
- Lichen Zhao
- Rui Su
- Rui Zhu
- Taoyu Zou
- Thomas Paul Russell
- Wengqiang Yang
- Xiaoyu Yang
- Ya Wang
- Zhenghong Lu
Organizations
- National Natural Science Foundation of China
- Natural Sciences and Engineering Research Council
- Office of Basic Energy Sciences
- Office of Naval Research
- Office of Science
- Peking University
- Southern University of Science and Technology
- United States Department of Energy
- University of Massachusetts
- University of Toronto