Impact of Humidity and Temperature on the Stability of the Optical Properties and Structure of MAPbI3, MA0.7FA0.3PbI3 and (FAPbI3)0.95(MAPbBr3)0.05 Perovskite Thin Films
Abstract
In situ real-time spectroscopic ellipsometry (RTSE) measurements have been conducted on MAPbI3, MA0.7FA0.3PbI3, and (FAPbI3)0.95(MAPbBr3)0.05 perovskite thin films when exposed to different levels of relative humidity at given temperatures over time. Analysis of RTSE measurements track changes in the complex dielectric function spectra and structure, which indicate variations in stability influenced by the underlying material, preparation method, and perovskite composition. MAPbI3 and MA0.7FA0.3PbI3 films deposited on commercial fluorine-doped tin oxide coated glass are more stable than corresponding films deposited on soda lime glass directly. (FAPbI3)0.95(MAPbBr3)0.05 films on soda lime glass showed improved stability over the other compositions regardless of the substrate, and this is attributed to the preparation method as well as the final composition.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 20, 2021
- Source ID
- 10.3390/ma14144054
Entities
People
- Biwas Subedi
- Cong Chen
- Marie Solange Tumusange
- Maxwell M Junda
- Nikolas J. Podraza
- Yanfa Yan
- Zhaoning Song
Organizations
- National Science Foundation
- Office of Energy Efficiency and Renewable Energy
- Office of Naval Research
- Ohio Department of Development
- United States Department of Energy