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Hydrogen bonding drives the self-assembling of carbazole-based hole-transport material for enhanced efficiency and stability of perovskite solar cells

Wang, Cheng ; Liu, Maning LU orcid ; Rahman, Sunardi ; Pasanen, Hannu Pekka ; Tian, Jingshu ; Li, Jianhui ; Deng, Zhifeng ; Zhang, Haichang and Vivo, Paola (2022) In Nano Energy 101.
Abstract

Designing a hole-transport material (HTM) that guarantees effective hole transport while self-assembling at the perovskite|HTM interface with the formation of an ordered interlayer, has recently emerged as a promising strategy for high-performance and stable perovskite solar cells (PSCs). Hydrogen bonding (HB) is a versatile multi-functional tool for the design of small molecular HTMs. However, to date, its employment is mostly limited to p-i-n inverted PSCs. This study demonstrates the advantages of a novel HTM design that can self-assemble into a long-range ordered interlayer on the perovskite surface via HB association. A hydro-functional HTM (O1) is compared to a reference HTM (O2) that cannot form HB due to the replacement of the... (More)

Designing a hole-transport material (HTM) that guarantees effective hole transport while self-assembling at the perovskite|HTM interface with the formation of an ordered interlayer, has recently emerged as a promising strategy for high-performance and stable perovskite solar cells (PSCs). Hydrogen bonding (HB) is a versatile multi-functional tool for the design of small molecular HTMs. However, to date, its employment is mostly limited to p-i-n inverted PSCs. This study demonstrates the advantages of a novel HTM design that can self-assemble into a long-range ordered interlayer on the perovskite surface via HB association. A hydro-functional HTM (O1) is compared to a reference HTM (O2) that cannot form HB due to the replacement of the amide group of O1 with a plain butyl alkyl chain in O2. As a result, O1-based n-i-p PSCs display enhanced hole extraction reaction, suppressed interfacial charge recombination, reduced hysteresis effect, and an increase in Voc (by 60 mV), FF (>11% increase), and overall power conversion efficiency, PCE (32% increase) compared to the case of HB-free O2-based devices. Remarkable stability is observed for unencapsulated O1 cells, with a T80 lifetime of 35.5 h under continuous maximum power point tracking in air. This work emphasizes the role of HB-directed self-assembling in simultaneously enhancing both the PCE and stability of popular n-i-p PSCs. This study paves the way for the development of new hydro-functional charge-transport material designs for efficient and stable PSCs.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hole-transport materials, Hydrogen bonding, Interfaces, Perovskite solar cells, Self-assembly, Stability
in
Nano Energy
volume
101
article number
107604
publisher
Elsevier
external identifiers
  • scopus:85134593701
ISSN
2211-2855
DOI
10.1016/j.nanoen.2022.107604
language
English
LU publication?
no
id
bc30ab97-9c52-4869-a5e8-7fbe7084d96f
date added to LUP
2023-08-24 12:14:01
date last changed
2023-08-25 10:21:18
@article{bc30ab97-9c52-4869-a5e8-7fbe7084d96f,
  abstract     = {{<p>Designing a hole-transport material (HTM) that guarantees effective hole transport while self-assembling at the perovskite|HTM interface with the formation of an ordered interlayer, has recently emerged as a promising strategy for high-performance and stable perovskite solar cells (PSCs). Hydrogen bonding (HB) is a versatile multi-functional tool for the design of small molecular HTMs. However, to date, its employment is mostly limited to p-i-n inverted PSCs. This study demonstrates the advantages of a novel HTM design that can self-assemble into a long-range ordered interlayer on the perovskite surface via HB association. A hydro-functional HTM (O1) is compared to a reference HTM (O2) that cannot form HB due to the replacement of the amide group of O1 with a plain butyl alkyl chain in O2. As a result, O1-based n-i-p PSCs display enhanced hole extraction reaction, suppressed interfacial charge recombination, reduced hysteresis effect, and an increase in V<sub>oc</sub> (by 60 mV), FF (&gt;11% increase), and overall power conversion efficiency, PCE (32% increase) compared to the case of HB-free O2-based devices. Remarkable stability is observed for unencapsulated O1 cells, with a T<sub>80</sub> lifetime of 35.5 h under continuous maximum power point tracking in air. This work emphasizes the role of HB-directed self-assembling in simultaneously enhancing both the PCE and stability of popular n-i-p PSCs. This study paves the way for the development of new hydro-functional charge-transport material designs for efficient and stable PSCs.</p>}},
  author       = {{Wang, Cheng and Liu, Maning and Rahman, Sunardi and Pasanen, Hannu Pekka and Tian, Jingshu and Li, Jianhui and Deng, Zhifeng and Zhang, Haichang and Vivo, Paola}},
  issn         = {{2211-2855}},
  keywords     = {{Hole-transport materials; Hydrogen bonding; Interfaces; Perovskite solar cells; Self-assembly; Stability}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Nano Energy}},
  title        = {{Hydrogen bonding drives the self-assembling of carbazole-based hole-transport material for enhanced efficiency and stability of perovskite solar cells}},
  url          = {{http://dx.doi.org/10.1016/j.nanoen.2022.107604}},
  doi          = {{10.1016/j.nanoen.2022.107604}},
  volume       = {{101}},
  year         = {{2022}},
}