Trapped charge-driven degradation of perovskite solar cells
- Authors
- Ahn, Namyoung; Kwak, Kwisung; Jang, Min Seok; Yoon, Heetae; Lee, Byung Yang; Lee, Jong-Kwon; Pikhitsa, Peter V.; Byun, Junseop; Choi, Mansoo
- Issue Date
- 10-11월-2016
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.7
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 7
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/86841
- DOI
- 10.1038/ncomms13422
- ISSN
- 2041-1723
- Abstract
- Perovskite solar cells have shown unprecedent performance increase up to 22% efficiency. However, their photovoltaic performance has shown fast deterioration under light illumination in the presence of humid air even with encapulation. The stability of perovskite materials has been unsolved and its mechanism has been elusive. Here we uncover a mechanism for irreversible degradation of perovskite materials in which trapped charges, regardless of the polarity, play a decisive role. An experimental setup using different polarity ions revealed that the moisture-induced irreversible dissociation of perovskite materials is triggered by charges trapped along grain boundaries. We also identified the synergetic effect of oxygen on the process of moisture-induced degradation. The deprotonation of organic cations by trapped charge-induced local electric field would be attributed to the initiation of irreversible decomposition.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.