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Ternary Organic Solar Cells with Minimum Voltage Losses

Wang, Chuanfei; Zhang, Wei LU ; Meng, Xiangyi; Bergqvist, Jonas; Liu, Xianjie; Genene, Zewdneh; Xu, Xiaofeng; Yartsev, Arkady LU ; Inganäs, Olle and Ma, Wei, et al. (2017) In Advanced Energy Materials 7(21).
Abstract

A new strategy for designing ternary solar cells is reported in this paper. A low-bandgap polymer named PTB7-Th and a high-bandgap polymer named PBDTTS-FTAZ sharing the same bulk ionization potential and interface positive integer charge transfer energy while featuring complementary absorption spectra are selected. They are used to fabricate efficient ternary solar cells, where the hole can be transported freely between the two donor polymers and collected by the electrode as in one broadband low bandgap polymer. Furthermore, the fullerene acceptor is chosen so that the energy of the positive integer charge transfer state of the two donor polymers is equal to the energy of negative integer charge transfer state of the fullerene,... (More)

A new strategy for designing ternary solar cells is reported in this paper. A low-bandgap polymer named PTB7-Th and a high-bandgap polymer named PBDTTS-FTAZ sharing the same bulk ionization potential and interface positive integer charge transfer energy while featuring complementary absorption spectra are selected. They are used to fabricate efficient ternary solar cells, where the hole can be transported freely between the two donor polymers and collected by the electrode as in one broadband low bandgap polymer. Furthermore, the fullerene acceptor is chosen so that the energy of the positive integer charge transfer state of the two donor polymers is equal to the energy of negative integer charge transfer state of the fullerene, enabling enhanced dissociation of all polymer donor and fullerene acceptor excitons and suppressed bimolecular and trap assistant recombination. The two donor polymers feature good miscibility and energy transfer from high-bandgap polymer of PBDTTS-FTAZ to low-bandgap polymer of PTB7-Th, which contribute to enhanced performance of the ternary solar cell.

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publication status
published
subject
keywords
binary equivalent, minimum voltage losses, same bulk and interface energy, ternary solar cells
in
Advanced Energy Materials
volume
7
issue
21
publisher
Wiley-Blackwell
external identifiers
  • scopus:85025441174
  • wos:000414711100002
ISSN
1614-6832
DOI
10.1002/aenm.201700390
language
English
LU publication?
yes
id
1b2671ae-e48c-4624-8830-bb344da6a567
date added to LUP
2017-11-22 10:23:21
date last changed
2018-08-12 04:40:50
@article{1b2671ae-e48c-4624-8830-bb344da6a567,
  abstract     = {<p>A new strategy for designing ternary solar cells is reported in this paper. A low-bandgap polymer named PTB7-Th and a high-bandgap polymer named PBDTTS-FTAZ sharing the same bulk ionization potential and interface positive integer charge transfer energy while featuring complementary absorption spectra are selected. They are used to fabricate efficient ternary solar cells, where the hole can be transported freely between the two donor polymers and collected by the electrode as in one broadband low bandgap polymer. Furthermore, the fullerene acceptor is chosen so that the energy of the positive integer charge transfer state of the two donor polymers is equal to the energy of negative integer charge transfer state of the fullerene, enabling enhanced dissociation of all polymer donor and fullerene acceptor excitons and suppressed bimolecular and trap assistant recombination. The two donor polymers feature good miscibility and energy transfer from high-bandgap polymer of PBDTTS-FTAZ to low-bandgap polymer of PTB7-Th, which contribute to enhanced performance of the ternary solar cell.</p>},
  articleno    = {1700390},
  author       = {Wang, Chuanfei and Zhang, Wei and Meng, Xiangyi and Bergqvist, Jonas and Liu, Xianjie and Genene, Zewdneh and Xu, Xiaofeng and Yartsev, Arkady and Inganäs, Olle and Ma, Wei and Wang, Ergang and Fahlman, Mats},
  issn         = {1614-6832},
  keyword      = {binary equivalent,minimum voltage losses,same bulk and interface energy,ternary solar cells},
  language     = {eng},
  month        = {11},
  number       = {21},
  publisher    = {Wiley-Blackwell},
  series       = {Advanced Energy Materials},
  title        = {Ternary Organic Solar Cells with Minimum Voltage Losses},
  url          = {http://dx.doi.org/10.1002/aenm.201700390},
  volume       = {7},
  year         = {2017},
}