Argon Plasma Treatment to Tune Perovskite Surface Composition for High Efficiency Solar Cells and Fast Photodetectors
Abstract
The surface composition of perovskite films is very sensitive to film processing and can deviate from the optimal, which generates unfavorable defects and results in efficiency loss in solar cells and slow response speed in photodetectors. An argon plasma treatment is introduced to modify the surface composition by tuning the ratio of organic and inorganic components as well as defect type before deposition of the passivating layer. It can efficiently enhance the charge collection across the perovskite–electrode interface by suppressing charge recombination. Therefore, perovskite solar cells with argon plasma treatment yield enhanced efficiency to 20.4% and perovskite photodetectors can reach their fastest respond speed, which is solely limited by the carrier mobility.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 10, 2018
- Source ID
- 10.1002/adma.201705176
Entities
People
- Benjamin R. Ecker
- Chunxiong Bao
- Congcong Wang
- Jinsong Huang
- Jun Dai
- Shi Tang
- Xiao Cheng Zeng
- Xiaopeng Zheng
- Xun Xiao
- Yanjun Fang
- Ye Liu
- Yehao Deng
- Yongli Gao
- Yuze Lin
Organizations
- Air Force Office of Scientific Research
- National Science Foundation
- University of Nebraska–Lincoln
- University of North Carolina
- University of Rochester