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Perfluorinated Self-Assembled Monolayers Enhance the Stability and Efficiency of Inverted Perovskite Solar Cells

Wolff, Christian M. ; Canil, Laura ; Rehermann, Carolin ; Ngoc Linh, Nguyen ; Zu, Fengshuo ; Ralaiarisoa, Maryline ; Caprioglio, Pietro ; Fiedler, Lukas ; Stolterfoht, Martin and Kogikoski, Sergio , et al. (2020) In ACS Nano 14(2). p.1445-1456
Abstract

Perovskite solar cells are among the most exciting photovoltaic systems as they combine low recombination losses, ease of fabrication, and high spectral tunability. The Achilles heel of this technology is the device stability due to the ionic nature of the perovskite crystal, rendering it highly hygroscopic, and the extensive diffusion of ions especially at increased temperatures. Herein, we demonstrate the application of a simple solution-processed perfluorinated self-assembled monolayer (p-SAM) that not only enhances the solar cell efficiency, but also improves the stability of the perovskite absorber and, in turn, the solar cell under increased temperature or humid conditions. The p-i-n-type perovskite devices employing these SAMs... (More)

Perovskite solar cells are among the most exciting photovoltaic systems as they combine low recombination losses, ease of fabrication, and high spectral tunability. The Achilles heel of this technology is the device stability due to the ionic nature of the perovskite crystal, rendering it highly hygroscopic, and the extensive diffusion of ions especially at increased temperatures. Herein, we demonstrate the application of a simple solution-processed perfluorinated self-assembled monolayer (p-SAM) that not only enhances the solar cell efficiency, but also improves the stability of the perovskite absorber and, in turn, the solar cell under increased temperature or humid conditions. The p-i-n-type perovskite devices employing these SAMs exhibited power conversion efficiencies surpassing 21%. Notably, the best performing devices are stable under standardized maximum power point operation at 85 °C in inert atmosphere (ISOS-L-2) for more than 250 h and exhibit superior humidity resilience, maintaining ∼95% device performance even if stored in humid air in ambient conditions over months (∼3000 h, ISOS-D-1). Our work, therefore, demonstrates a strategy towards efficient and stable perovskite solar cells with easily deposited functional interlayers.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
interfaces, inverted perovskite solar cells, recombination, self-assembled monolayers, stability
in
ACS Nano
volume
14
issue
2
pages
12 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:31909973
  • scopus:85079037156
ISSN
1936-0851
DOI
10.1021/acsnano.9b03268
language
English
LU publication?
yes
id
4fa08419-69c8-4401-b508-aa5e1db2d9fa
date added to LUP
2020-12-16 15:26:39
date last changed
2025-04-18 08:25:33
@article{4fa08419-69c8-4401-b508-aa5e1db2d9fa,
  abstract     = {{<p>Perovskite solar cells are among the most exciting photovoltaic systems as they combine low recombination losses, ease of fabrication, and high spectral tunability. The Achilles heel of this technology is the device stability due to the ionic nature of the perovskite crystal, rendering it highly hygroscopic, and the extensive diffusion of ions especially at increased temperatures. Herein, we demonstrate the application of a simple solution-processed perfluorinated self-assembled monolayer (p-SAM) that not only enhances the solar cell efficiency, but also improves the stability of the perovskite absorber and, in turn, the solar cell under increased temperature or humid conditions. The p-i-n-type perovskite devices employing these SAMs exhibited power conversion efficiencies surpassing 21%. Notably, the best performing devices are stable under standardized maximum power point operation at 85 °C in inert atmosphere (ISOS-L-2) for more than 250 h and exhibit superior humidity resilience, maintaining ∼95% device performance even if stored in humid air in ambient conditions over months (∼3000 h, ISOS-D-1). Our work, therefore, demonstrates a strategy towards efficient and stable perovskite solar cells with easily deposited functional interlayers.</p>}},
  author       = {{Wolff, Christian M. and Canil, Laura and Rehermann, Carolin and Ngoc Linh, Nguyen and Zu, Fengshuo and Ralaiarisoa, Maryline and Caprioglio, Pietro and Fiedler, Lukas and Stolterfoht, Martin and Kogikoski, Sergio and Bald, Ilko and Koch, Norbert and Unger, Eva L. and Dittrich, Thomas and Abate, Antonio and Neher, Dieter}},
  issn         = {{1936-0851}},
  keywords     = {{interfaces; inverted perovskite solar cells; recombination; self-assembled monolayers; stability}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{1445--1456}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Nano}},
  title        = {{Perfluorinated Self-Assembled Monolayers Enhance the Stability and Efficiency of Inverted Perovskite Solar Cells}},
  url          = {{http://dx.doi.org/10.1021/acsnano.9b03268}},
  doi          = {{10.1021/acsnano.9b03268}},
  volume       = {{14}},
  year         = {{2020}},
}