Rationally Induced Interfacial Dipole in Planar Heterojunction Perovskite Solar Cells for Reduced J–V Hysteresis
Abstract
With the rapid progress in developing hybrid perovskite solar cells, the allure of current density–voltage ( J–V) hysteresis has attracted quite a lot of interest in the research community. It requires feasible approaches that further deepen the fundamental understanding of device physics in specific device architecture in order to solve this problem eventually. Here, perovskite solar cells configured with different counter electrodes are systematically investigated with the focus on charge accumulation within the devices responsible for J–V hysteresis. The results indicate that J–V hysteresis is affected by charge accumulation which can be modulated by carrier extraction efficiency of the electrodes. Through a rationally induced interfacial dipole, the devices have shown improvement in carrier extraction, which thus reduces J–V hysteresis significantly. It provides solid evidence for the proposition that interface charge plays an important role in J–V hysteresis, and demonstrates an applicable strategy that effectively alleviates J–V hysteresis in perovskite solar cells.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 21, 2018
- Source ID
- 10.1002/aenm.201800568
Entities
People
- Huanping Zhou
- Jin‐wook Lee
- Lei Meng
- Nicholas De Marco
- Pengyu Sun
- Qi Chen
- Xiaobao Xu
- Yang Yang
- Yao‐tsung Hsieh
- Yi‐bing Cheng
- Zhixin Zhao
- Zonghao Liu
Organizations
- Air Force Office of Scientific Research
- Beijing Institute of Technology
- Huazhong University of Science and Technology
- Monash University
- National Science Foundation
- Peking University
- University of California