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Article . 2022 . Peer-reviewed
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Molecular Engineering of Fluorene‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells

Authors: Jegorovė, Aistė; Momblona, Cristina; Daškevičienė, Marytė; Magomedov, Artiom; Degutyte, Rimgaile; Asiri, Abdullah M.; Jankauskas, Vygintas; +6 Authors

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

Abstract

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 Spiro‐OMeTAD 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 23.41 mA 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.

Countries
Lithuania, Switzerland
Keywords

hole-transporting materials, spiro-ometad analogues, high-performance, perovskite solar cells, carbazolyl chromophores ; fluorene ; hole-transporting materials ; perovskite solar cells ; spiro-OMeTAD analogues, spiro-OMeTAD analogues, fluorene, carbazolyl chromophores, cost, enamines

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
12
Top 10%
Average
Top 10%
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