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Aggregation-Induced Emission in a Polymeric Photovoltaic Donor Material

Feng, Junyi ; Hu, Rong ; Jiang, Jianjun ; Cai, Zekai ; Pan, Shusheng ; Zou, Xianshao LU ; Dong, Geng LU ; Zhao, Ningjiu and Zhang, Wei LU (2022) In Journal of Physical Chemistry C 126(48). p.20275-20283
Abstract

In this work, we report the aggregation-induced emission in a polymeric donor material poly(bis(2-butyloctyl)[2,2′:5′,2″-terthiophene]-4,4″-dicarboxylate-5,5′-diyl-vinylene) (PTVT-T), which exhibits a high device performance for the application of photovoltaics. Time-dependent density functional theory calculations and steady-state and time-resolved spectroscopy have been employed to reveal the underlying emission mechanism. We find that the aggregation of the PTVT-T polymer chain in solution increases the exciton luminescence lifetime and exciton emission quantum yield, which is related to the effective torsional inhibition of carbon-carbon single bonds. Compared with the aggregates in solution, the exciton emission quantum yield of... (More)

In this work, we report the aggregation-induced emission in a polymeric donor material poly(bis(2-butyloctyl)[2,2′:5′,2″-terthiophene]-4,4″-dicarboxylate-5,5′-diyl-vinylene) (PTVT-T), which exhibits a high device performance for the application of photovoltaics. Time-dependent density functional theory calculations and steady-state and time-resolved spectroscopy have been employed to reveal the underlying emission mechanism. We find that the aggregation of the PTVT-T polymer chain in solution increases the exciton luminescence lifetime and exciton emission quantum yield, which is related to the effective torsional inhibition of carbon-carbon single bonds. Compared with the aggregates in solution, the exciton emission quantum yield of the aggregates in PTVT-T film is reduced. It is attributable to exciton delocalization caused by the improvement of molecular planarity in film. We also observe that the as-cast film and thermally annealed film show distinctly different emission behaviors. This work can shed light on designing optoelectronic polymer materials with the integration of photovoltaic and light-emitting functions.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
126
issue
48
pages
9 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85143551593
ISSN
1932-7447
DOI
10.1021/acs.jpcc.2c06848
language
English
LU publication?
yes
id
14d6f2f3-5e29-4edb-a43f-fe3ef63a3c62
date added to LUP
2023-01-20 15:44:33
date last changed
2023-11-21 15:57:25
@article{14d6f2f3-5e29-4edb-a43f-fe3ef63a3c62,
  abstract     = {{<p>In this work, we report the aggregation-induced emission in a polymeric donor material poly(bis(2-butyloctyl)[2,2′:5′,2″-terthiophene]-4,4″-dicarboxylate-5,5′-diyl-vinylene) (PTVT-T), which exhibits a high device performance for the application of photovoltaics. Time-dependent density functional theory calculations and steady-state and time-resolved spectroscopy have been employed to reveal the underlying emission mechanism. We find that the aggregation of the PTVT-T polymer chain in solution increases the exciton luminescence lifetime and exciton emission quantum yield, which is related to the effective torsional inhibition of carbon-carbon single bonds. Compared with the aggregates in solution, the exciton emission quantum yield of the aggregates in PTVT-T film is reduced. It is attributable to exciton delocalization caused by the improvement of molecular planarity in film. We also observe that the as-cast film and thermally annealed film show distinctly different emission behaviors. This work can shed light on designing optoelectronic polymer materials with the integration of photovoltaic and light-emitting functions.</p>}},
  author       = {{Feng, Junyi and Hu, Rong and Jiang, Jianjun and Cai, Zekai and Pan, Shusheng and Zou, Xianshao and Dong, Geng and Zhao, Ningjiu and Zhang, Wei}},
  issn         = {{1932-7447}},
  language     = {{eng}},
  number       = {{48}},
  pages        = {{20275--20283}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry C}},
  title        = {{Aggregation-Induced Emission in a Polymeric Photovoltaic Donor Material}},
  url          = {{http://dx.doi.org/10.1021/acs.jpcc.2c06848}},
  doi          = {{10.1021/acs.jpcc.2c06848}},
  volume       = {{126}},
  year         = {{2022}},
}