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  4. Tailoring electric dipole of hole-transporting material p-dopants for perovskite solar cells
 
research article

Tailoring electric dipole of hole-transporting material p-dopants for perovskite solar cells

Xia, Jianxing  
•
Zhang, Yi  
•
Xiao, Chuanxiao
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July 20, 2022
Joule

Li-TFSI/t-BP are the most widely employed p-dopants for hole-transporting materials (HTMs) within the state-of-the-art perovskite solar cells (PSCs). The hygroscopicity and migration of these dopants, however, lead to devices with limited stability. To solve this problem, we report here on a diphenyl iodide cation and pentafluorophenyl boric acid anion-based dopant (DIC-PBA) with an oriented interfacial dipole moment as an alternative to Li-TFSI/t-BP. Theoretical and experimental data reveal that DIC-PBA exhibits deep doping of poly[bis(4-phenyl)(2,4,6-triMethylphenyl)aMine] (PTAA) and also creates p-doping of perovskite surface, which originates from ionic interactions-derived dipole arrangement that yields fast interfacial charge transport. The improved intrinsic stability of PSCs originates from the inhibition of dipole moment degeneration on the perovskite surface. Devices prepared with DIC-PBA yielded high efficiency of 22.86%, and the modules (aperture area: 33.2 cm(2)) efficiency reached 19.13%. Importantly, the storage stability also significantly improved exceeding to 90% after aging 1,200 h under air ambient.

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Type
research article
DOI
10.1016/j.joule.2022.05.012
Web of Science ID

WOS:000980428900001

Author(s)
Xia, Jianxing  
Zhang, Yi  
Xiao, Chuanxiao
Brooks, Keith Gregory  
Chen, Min
Luo, Junsheng
Yang, Hua
Klipfel, Nadja Isabelle Desiree  
Zou, Jihua
Shi, Yu
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Date Issued

2022-07-20

Publisher

CELL PRESS

Published in
Joule
Volume

6

Issue

7

Start page

1689

End page

1709

Subjects

Chemistry, Physical

•

Energy & Fuels

•

Materials Science, Multidisciplinary

•

Chemistry

•

Materials Science

•

total-energy calculations

•

halide perovskites

•

work-functions

•

efficient

•

semiconductors

•

passivation

•

interface

•

stability

•

junction

•

route

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
Available on Infoscience
June 5, 2023
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/198107
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