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research article

Mixed cation 2D perovskite: a novel approach for enhanced perovskite solar cell stability

Abuhelaiqa, Mousa  
•
Gao, Xiao-Xin  
•
Ding, Yong  
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April 21, 2022
Sustainable Energy & Fuels

The integration of thin 2D perovskite layers at the 3D PVK/HTL interface is known to improve the power conversion efficiency and stability of perovskite solar cells (PSCs). In this work, we report a novel approach consisting of mixing two alkyl-based cations that form 2D perovskites (propylammonium iodide (PAI) and octyl ammonium iodide (OAI)) to form mixed cation 2D halide perovskite layers. The solar cells containing the mixed cations demonstrate enhanced device stability retaining 95% of performance after 1000 h under maximum power point tracking, far exceeding PSC samples with single OAI, 88% and PAI, 80% 2D layers. By cation mixing, the formation of a novel 2D perovskite crystal structure was confirmed by XRD and PL analysis and it was shown to have a uniform quasi-2D state (n = 2), a feature not found in single OAI and PAI samples. Notably, the novel morphology of the crystal structure leads to improved carrier dynamics and enhanced PSC stability.

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Type
research article
DOI
10.1039/d1se01721g
Web of Science ID

WOS:000790358800001

Author(s)
Abuhelaiqa, Mousa  
Gao, Xiao-Xin  
Ding, Yong  
Ding, Bin  
Yi, Zhang  
Sohail, Muhammad
Kanda, Hiroyuki  
Dyson, Paul J.  
Nazeeruddin, Mohammad Khaja  
Date Issued

2022-04-21

Publisher

ROYAL SOC CHEMISTRY

Published in
Sustainable Energy & Fuels
Volume

6

Issue

10

Start page

2471

End page

2477

Subjects

Chemistry, Physical

•

Energy & Fuels

•

Materials Science, Multidisciplinary

•

Chemistry

•

Energy & Fuels

•

Materials Science

•

defect tolerance

•

performance

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
LCOM  
Available on Infoscience
May 23, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188009
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