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Thionation Enhances the Performance of Polymeric Dopant-Free Hole-Transporting Materials for Perovskite Solar Cells

Zhang, Haichang ; Liu, Maning LU orcid ; Yang, Wenjun ; Judin, Lauri ; Hukka, Terttu I. ; Priimagi, Arri ; Deng, Zhifeng and Vivo, Paola (2019) In Advanced Materials Interfaces 6(18).
Abstract

To date, the most efficient perovskite solar cells (PSCs) require hole-transporting materials (HTMs) that are doped with hygroscopic additives to improve their performance. Unfortunately, such dopants negatively impact the overall PSCs stability and add cost and complexity to the device fabrication. Hence, there is a need to investigate new strategies to boost the typically modest performance of dopant-free HTMs for efficient and stable PSCs. Thionation is a simple and single-step approach to enhance the carrier-transport capability of organic semiconductors, yet still completely unexplored in the context of HTMs for PSCs. In this work, a novel polymeric semiconductor, P1, based on a diketopyrrolopyrrole (DPP) moiety, is proposed as a... (More)

To date, the most efficient perovskite solar cells (PSCs) require hole-transporting materials (HTMs) that are doped with hygroscopic additives to improve their performance. Unfortunately, such dopants negatively impact the overall PSCs stability and add cost and complexity to the device fabrication. Hence, there is a need to investigate new strategies to boost the typically modest performance of dopant-free HTMs for efficient and stable PSCs. Thionation is a simple and single-step approach to enhance the carrier-transport capability of organic semiconductors, yet still completely unexplored in the context of HTMs for PSCs. In this work, a novel polymeric semiconductor, P1, based on a diketopyrrolopyrrole (DPP) moiety, is proposed as a dopant-free HTM. Its modest performance in PSCs (power conversion efficiency (PCE) = 7.1%) is significantly enhanced upon thionation of the DPP moiety. The resulting dithioketopyrrolopyrrole-based HTM, P2, leads to PSCs with nearly 40% performance improvement (PCE = 9.7%) compared to devices based on the nonthionated HTM (P1). Furthermore, thionation also remarkably boosts the shelf-storage and thermal stability with respect to traditional 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene-based PSCs. This work provides useful insights to further design effective dopant-free HTMs employing the straightforward one-step thionation strategy for efficient and stable PSCs.

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author
; ; ; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
diketopyrrolopyrrole, dopant-free, hole-transporting materials, perovskite solar cells, thionation
in
Advanced Materials Interfaces
volume
6
issue
18
article number
1901036
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85070074303
ISSN
2196-7350
DOI
10.1002/admi.201901036
language
English
LU publication?
no
id
41d71bd2-f2b6-4a47-87a7-98f0fb640ba1
date added to LUP
2023-08-24 12:36:19
date last changed
2023-08-28 09:11:09
@article{41d71bd2-f2b6-4a47-87a7-98f0fb640ba1,
  abstract     = {{<p>To date, the most efficient perovskite solar cells (PSCs) require hole-transporting materials (HTMs) that are doped with hygroscopic additives to improve their performance. Unfortunately, such dopants negatively impact the overall PSCs stability and add cost and complexity to the device fabrication. Hence, there is a need to investigate new strategies to boost the typically modest performance of dopant-free HTMs for efficient and stable PSCs. Thionation is a simple and single-step approach to enhance the carrier-transport capability of organic semiconductors, yet still completely unexplored in the context of HTMs for PSCs. In this work, a novel polymeric semiconductor, P1, based on a diketopyrrolopyrrole (DPP) moiety, is proposed as a dopant-free HTM. Its modest performance in PSCs (power conversion efficiency (PCE) = 7.1%) is significantly enhanced upon thionation of the DPP moiety. The resulting dithioketopyrrolopyrrole-based HTM, P2, leads to PSCs with nearly 40% performance improvement (PCE = 9.7%) compared to devices based on the nonthionated HTM (P1). Furthermore, thionation also remarkably boosts the shelf-storage and thermal stability with respect to traditional 2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene-based PSCs. This work provides useful insights to further design effective dopant-free HTMs employing the straightforward one-step thionation strategy for efficient and stable PSCs.</p>}},
  author       = {{Zhang, Haichang and Liu, Maning and Yang, Wenjun and Judin, Lauri and Hukka, Terttu I. and Priimagi, Arri and Deng, Zhifeng and Vivo, Paola}},
  issn         = {{2196-7350}},
  keywords     = {{diketopyrrolopyrrole; dopant-free; hole-transporting materials; perovskite solar cells; thionation}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{18}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Materials Interfaces}},
  title        = {{Thionation Enhances the Performance of Polymeric Dopant-Free Hole-Transporting Materials for Perovskite Solar Cells}},
  url          = {{http://dx.doi.org/10.1002/admi.201901036}},
  doi          = {{10.1002/admi.201901036}},
  volume       = {{6}},
  year         = {{2019}},
}