Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 8, Issue 4, Pages 742-746Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.7b00055
Keywords
-
Categories
Funding
- Grants-in-Aid for Scientific Research [15H03764] Funding Source: KAKEN
Ask authors/readers for more resources
The trapping of charge carriers at defects on surfaces or grain boundaries is detrimental for the performance of perovskite solar cells (PSCs). For example, it is the main limiting factor for carrier lifetime. Moreover, it causes hysteresis in the current voltage curves, which is considered to be a serious issue for PSCs' operation. In this work, types of surface defects responsible for carrier trapping are clarified by a comprehensive first-principles investigation into surface defects of tetragonal CH3NH3PbI3 (MAPbI(3)). Considering defect formation energetics, it is proposed that a Pb-rich condition is preferred to an I-rich one; however, a moderate condition might possibly be the best choice. Our result paves the way for improving the performance of PSCs through a rational strategy of suppressing carrier trapping at surface defects.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available