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Photoinduced Polaron Formation in a Polymerized Electron-Acceptor Semiconductor

Zhao, Ningjiu ; Zhang, Rui ; Zou, Xianshao LU ; Su, Xiaojun ; Dang, Fan ; Wen, Guanzhao ; Zhang, Wei LU ; Zheng, Kaibo LU ; Chen, Hailong and Wu, Kehui (2022) In Journal of Physical Chemistry Letters 13(23). p.5143-5150
Abstract

Polymerized small molecular acceptor (PSMA) based all-polymer solar cells (all-PSC) have achieved power conversion efficiencies (PCE) over 16%, and the PSMA is considered to hold great promise for further improving the performance of all-PSC. Yet, in comparison with that of the polymer donor, the photophysics of a polymerized acceptor remains poorly understood. Herein, the excited state dynamics in a polymerized acceptor PZT810 was comprehensively investigated under various pump intensities and photon energies. The excess excitation energy was found to play a key role in excitons dissociation into free polarons for neat PSMA films, while free polarons cannot be generated from the polaron pairs in neat acceptor films. This work reveals... (More)

Polymerized small molecular acceptor (PSMA) based all-polymer solar cells (all-PSC) have achieved power conversion efficiencies (PCE) over 16%, and the PSMA is considered to hold great promise for further improving the performance of all-PSC. Yet, in comparison with that of the polymer donor, the photophysics of a polymerized acceptor remains poorly understood. Herein, the excited state dynamics in a polymerized acceptor PZT810 was comprehensively investigated under various pump intensities and photon energies. The excess excitation energy was found to play a key role in excitons dissociation into free polarons for neat PSMA films, while free polarons cannot be generated from the polaron pairs in neat acceptor films. This work reveals an in-depth understanding of relaxation dynamics for PSMAs and that the underlying photophysical origin of PSMA can be mediated by excitation energies and intensities. These results would benefit the realization of the working mechanism for all-PSC and the designing of new PSMAs.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry Letters
volume
13
issue
23
pages
5143 - 5150
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85132122815
  • pmid:35658092
ISSN
1948-7185
DOI
10.1021/acs.jpclett.2c01015
language
English
LU publication?
yes
id
296e230a-b289-48d6-9f35-39731e18e7eb
date added to LUP
2022-09-29 09:37:42
date last changed
2024-06-13 19:44:03
@article{296e230a-b289-48d6-9f35-39731e18e7eb,
  abstract     = {{<p>Polymerized small molecular acceptor (PSMA) based all-polymer solar cells (all-PSC) have achieved power conversion efficiencies (PCE) over 16%, and the PSMA is considered to hold great promise for further improving the performance of all-PSC. Yet, in comparison with that of the polymer donor, the photophysics of a polymerized acceptor remains poorly understood. Herein, the excited state dynamics in a polymerized acceptor PZT810 was comprehensively investigated under various pump intensities and photon energies. The excess excitation energy was found to play a key role in excitons dissociation into free polarons for neat PSMA films, while free polarons cannot be generated from the polaron pairs in neat acceptor films. This work reveals an in-depth understanding of relaxation dynamics for PSMAs and that the underlying photophysical origin of PSMA can be mediated by excitation energies and intensities. These results would benefit the realization of the working mechanism for all-PSC and the designing of new PSMAs. </p>}},
  author       = {{Zhao, Ningjiu and Zhang, Rui and Zou, Xianshao and Su, Xiaojun and Dang, Fan and Wen, Guanzhao and Zhang, Wei and Zheng, Kaibo and Chen, Hailong and Wu, Kehui}},
  issn         = {{1948-7185}},
  language     = {{eng}},
  number       = {{23}},
  pages        = {{5143--5150}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry Letters}},
  title        = {{Photoinduced Polaron Formation in a Polymerized Electron-Acceptor Semiconductor}},
  url          = {{http://dx.doi.org/10.1021/acs.jpclett.2c01015}},
  doi          = {{10.1021/acs.jpclett.2c01015}},
  volume       = {{13}},
  year         = {{2022}},
}