Barrier reinforcement for enhanced perovskite solar cell stability under reverse bias

Nengxu Li, Zhifang Shi, Chengbin Fei, Haoyang Jiao, Mingze Li, Hangyu Gu, Steven P. Harvey, Yifan Dong, Matthew C. Beard and Jinsong Huang ()
Additional contact information
Nengxu Li: University of North Carolina at Chapel Hill
Zhifang Shi: University of North Carolina at Chapel Hill
Chengbin Fei: University of North Carolina at Chapel Hill
Haoyang Jiao: University of North Carolina at Chapel Hill
Mingze Li: University of North Carolina at Chapel Hill
Hangyu Gu: University of North Carolina at Chapel Hill
Steven P. Harvey: National Renewable Energy Laboratory
Yifan Dong: National Renewable Energy Laboratory
Matthew C. Beard: National Renewable Energy Laboratory
Jinsong Huang: University of North Carolina at Chapel Hill

Nature Energy, 2024, vol. 9, issue 10, 1264-1274

Abstract: Abstract Stability of perovskite solar cells (PSCs) under light, heat, humidity and their combinations have been notably improved recently. However, PSCs have poor reverse-bias stability that limits their real-world application. Here we report a systematic study on the degradation mechanisms of p–i–n structure PSCs under reverse bias. The oxidation of iodide by injected holes at the cathode side initialize the reverse-bias-induced degradation, then the generated neutral iodine oxidizes metal electrode such as copper, followed by drift of Cu+ into perovskites and its reduction by injected electrons, resulting in localized metallic filaments and thus device breakdown. A reinforced barrier with combined lithium fluoride, tin oxide and indium tin oxide at the cathode side reduces device dark current and avoids the corrosion of Cu0. It dramatically increases breakdown voltage to above −20 V and improved the T90 lifetime of PSCs to ~1,000 h under –1.6 V. The modified minimodule also maintained over 90% of its initial performance after 720 h of shadow tests.

Date: 2024
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41560-024-01579-7 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:9:y:2024:i:10:d:10.1038_s41560-024-01579-7

Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/

DOI: 10.1038/s41560-024-01579-7

Access Statistics for this article

Nature Energy is currently edited by Fouad Khan

More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().