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Ternary organic solar cells with enhanced open circuit voltage

Wang, Chuanfei; Xu, Xiaofeng; Zhang, Wei LU ; Dkhil, Sadok Ben; Meng, Xiangyi; Liu, Xianjie; Margeat, Olivier; Yartsev, Arkady LU ; Ma, Wei and Ackermann, Jörg, et al. (2017) In Nano Energy 37. p.24-31
Abstract

By introducing a non-fullerene small molecule acceptor as a third component to typical polymer donor: fullerene acceptor binary solar cells, we demonstrate that the short circuit current density (Jsc), open circuit voltage (Voc), power conversion efficiency (PCE) and thermal stability can be enhanced simultaneously. The different surface energy of each component causes most of the non-fullerene acceptor molecules to self-organize at the polymer/fullerene interface, while the appropriately selected oxidation/reduction potential of the non-fullerene acceptor enables the resulting ternary junction to work through a cascade mechanism. The cascade ternary junction enhances charge generation through complementary... (More)

By introducing a non-fullerene small molecule acceptor as a third component to typical polymer donor: fullerene acceptor binary solar cells, we demonstrate that the short circuit current density (Jsc), open circuit voltage (Voc), power conversion efficiency (PCE) and thermal stability can be enhanced simultaneously. The different surface energy of each component causes most of the non-fullerene acceptor molecules to self-organize at the polymer/fullerene interface, while the appropriately selected oxidation/reduction potential of the non-fullerene acceptor enables the resulting ternary junction to work through a cascade mechanism. The cascade ternary junction enhances charge generation through complementary absorption between the non-fullerene and fullerene acceptors and aids the efficient charge extraction from fullerene domains. The bimolecular recombination in the ternary blend layer is reduced as the ternary cascade junction increases the separation of holes and electrons during charge transportation and the trap assistant recombination induced by integer charge transfer (ICT) state potentially reduced due to the smaller pinning energy of inserted non-fullerene acceptor, leading to an unprecedented increase in the open circuit voltage beyond the binary reference values.

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publication status
published
subject
keywords
Generality, Higher open circuit voltage, More thermal stable, Self-organization, Ternary organic solar cell
in
Nano Energy
volume
37
pages
8 pages
publisher
Elsevier
external identifiers
  • scopus:85018743469
  • wos:000402704500004
ISSN
2211-2855
DOI
10.1016/j.nanoen.2017.04.060
language
English
LU publication?
yes
id
d47a49bf-3846-4c17-9c61-bbeeccb57a9c
date added to LUP
2017-05-23 14:25:57
date last changed
2017-11-19 04:40:19
@article{d47a49bf-3846-4c17-9c61-bbeeccb57a9c,
  abstract     = {<p>By introducing a non-fullerene small molecule acceptor as a third component to typical polymer donor: fullerene acceptor binary solar cells, we demonstrate that the short circuit current density (J<sub>sc</sub>), open circuit voltage (V<sub>oc</sub>), power conversion efficiency (PCE) and thermal stability can be enhanced simultaneously. The different surface energy of each component causes most of the non-fullerene acceptor molecules to self-organize at the polymer/fullerene interface, while the appropriately selected oxidation/reduction potential of the non-fullerene acceptor enables the resulting ternary junction to work through a cascade mechanism. The cascade ternary junction enhances charge generation through complementary absorption between the non-fullerene and fullerene acceptors and aids the efficient charge extraction from fullerene domains. The bimolecular recombination in the ternary blend layer is reduced as the ternary cascade junction increases the separation of holes and electrons during charge transportation and the trap assistant recombination induced by integer charge transfer (ICT) state potentially reduced due to the smaller pinning energy of inserted non-fullerene acceptor, leading to an unprecedented increase in the open circuit voltage beyond the binary reference values.</p>},
  author       = {Wang, Chuanfei and Xu, Xiaofeng and Zhang, Wei and Dkhil, Sadok Ben and Meng, Xiangyi and Liu, Xianjie and Margeat, Olivier and Yartsev, Arkady and Ma, Wei and Ackermann, Jörg and Wang, Ergang and Fahlman, Mats},
  issn         = {2211-2855},
  keyword      = {Generality,Higher open circuit voltage,More thermal stable,Self-organization,Ternary organic solar cell},
  language     = {eng},
  month        = {07},
  pages        = {24--31},
  publisher    = {Elsevier},
  series       = {Nano Energy},
  title        = {Ternary organic solar cells with enhanced open circuit voltage},
  url          = {http://dx.doi.org/10.1016/j.nanoen.2017.04.060},
  volume       = {37},
  year         = {2017},
}