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  4. Molecular Engineering of Fluorene-Based Hole-Transporting Materials for Efficient Perovskite Solar Cells
 
research article

Molecular Engineering of Fluorene-Based Hole-Transporting Materials for Efficient Perovskite Solar Cells

Jegorove, Aiste
•
Momblona, Cristina  
•
Daskeviciene, Maryte
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February 24, 2022
Solar Rrl

New Spiro-OMeTAD analogues and the simpler "half" structures with the terminated methoxyphenyl and/or carbazolyl chromophores are successfully synthesized under Hartwig-Buchwald amination conditions using commercially available starting materials. New fluorene-based hole-transporting materials combined with suitable ionization energies properly align with the valence band of the perovskite absorber. Additionally, these compounds are amorphous, which is an advantage for the formation of homogenous films, as well as eliminate the possibility for films to crystallize during operation of the devices. The most efficient perovskite solar cells devices contain carbazolyl-terminated SpiroOMeTAD analogue V1267 and reach a power conversion efficiency of 18.3%, along with a short-circuit current density, open-circuit voltage, and fill factor of 23.41mA cm(-2), 1.06 V, and 74.0%, respectively. Moreover, "half" structures with methoxyphenyl/carbazolyl fragments show excellent long-term stability and outperform Spiro-OMeTAD and, therefore, hold a great prospect for practical wide-scale applications in optoelectronic devices.

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Type
research article
DOI
10.1002/solr.202100990
Web of Science ID

WOS:000760133400001

Author(s)
Jegorove, Aiste
Momblona, Cristina  
Daskeviciene, Maryte
Magomedov, Artiom
Degutyte, Rimgaile
Asiri, Abdullah M.
Jankauskas, Vygintas
Sutanto, Albertus Adrian  
Kanda, Hiroyuki  
Brooks, Keith  
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Date Issued

2022-02-24

Publisher

WILEY-V C H VERLAG GMBH

Published in
Solar Rrl
Article Number

2100990

Subjects

Energy & Fuels

•

Materials Science, Multidisciplinary

•

Materials Science

•

carbazolyl chromophores

•

fluorene

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hole-transporting materials

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perovskite solar cells

•

spiro-ometad analogues

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high-performance

•

enamines

•

cost

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
Available on Infoscience
March 14, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/186369
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