Ligand-assisted cation-exchange engineering for high-efficiency colloidal Cs1−xFAxPbI3 quantum dot solar cells with reduced phase segregation

Mengmeng Hao, Yang Bai (), Stefan Zeiske, Long Ren, Junxian Liu, Yongbo Yuan, Nasim Zarrabi, Ningyan Cheng, Mehri Ghasemi, Peng Chen, Miaoqiang Lyu, Dongxu He, Jung-Ho Yun, Yi Du, Yun Wang, Shanshan Ding, Ardalan Armin, Paul Meredith, Gang Liu, Hui-Ming Cheng and Lianzhou Wang ()
Additional contact information
Mengmeng Hao: The University of Queensland
Yang Bai: The University of Queensland
Stefan Zeiske: Swansea University
Long Ren: University of Wollongong
Junxian Liu: Griffith University
Yongbo Yuan: Central South University
Nasim Zarrabi: Swansea University
Ningyan Cheng: University of Wollongong
Mehri Ghasemi: The University of Queensland
Peng Chen: The University of Queensland
Miaoqiang Lyu: The University of Queensland
Dongxu He: The University of Queensland
Jung-Ho Yun: The University of Queensland
Yi Du: University of Wollongong
Yun Wang: Griffith University
Shanshan Ding: The University of Queensland
Ardalan Armin: Swansea University
Paul Meredith: Swansea University
Gang Liu: Chinese Academy of Sciences
Hui-Ming Cheng: Chinese Academy of Sciences
Lianzhou Wang: The University of Queensland

Nature Energy, 2020, vol. 5, issue 1, 79-88

Abstract: Abstract The mixed caesium and formamidinium lead triiodide perovskite system (Cs1−xFAxPbI3) in the form of quantum dots (QDs) offers a pathway towards stable perovskite-based photovoltaics and optoelectronics. However, it remains challenging to synthesize such multinary QDs with desirable properties for high-performance QD solar cells (QDSCs). Here we report an effective oleic acid (OA) ligand-assisted cation-exchange strategy that allows controllable synthesis of Cs1−xFAxPbI3 QDs across the whole composition range (x = 0–1), which is inaccessible in large-grain polycrystalline thin films. In an OA-rich environment, the cross-exchange of cations is facilitated, enabling rapid formation of Cs1−xFAxPbI3 QDs with reduced defect density. The hero Cs0.5FA0.5PbI3 QDSC achieves a certified record power conversion efficiency (PCE) of 16.6% with negligible hysteresis. We further demonstrate that the QD devices exhibit substantially enhanced photostability compared with their thin-film counterparts because of suppressed phase segregation, and they retain 94% of the original PCE under continuous 1-sun illumination for 600 h.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41560-019-0535-7 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:5:y:2020:i:1:d:10.1038_s41560-019-0535-7

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

DOI: 10.1038/s41560-019-0535-7

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 ().