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Low Band Gap Polymer Solar Cells With Minimal Voltage Losses

Wang, Chuanfei ; Xu, Xiaofeng ; Zhang, Wei LU ; Bergqvist, Jonas ; Xia, Yuxin ; Meng, Xiangyi ; Bini, Kim ; Ma, Wei ; Yartsev, Arkady LU orcid and Vandewal, Koen , et al. (2016) In Advanced Energy Materials 6(18).
Abstract

One of the factors limiting the performance of organic solar cells (OSCs) is their large energy losses (E loss) in the conversion from photons to electrons, typically believed to be around 0.6 eV and often higher than those of inorganic solar cells. In this work, a novel low band gap polymer PIDTT-TID with a optical gap of 1.49 eV is synthesized and used as the donor combined with PC71BM in solar cells. These solar cells attain a good power conversion efficiency of 6.7% with a high open-circuit voltage of 1.0 V, leading to the E loss as low as 0.49 eV. A systematic study indicates that the driving force in this donor and acceptor system is sufficient for charge generation with the low E loss.... (More)

One of the factors limiting the performance of organic solar cells (OSCs) is their large energy losses (E loss) in the conversion from photons to electrons, typically believed to be around 0.6 eV and often higher than those of inorganic solar cells. In this work, a novel low band gap polymer PIDTT-TID with a optical gap of 1.49 eV is synthesized and used as the donor combined with PC71BM in solar cells. These solar cells attain a good power conversion efficiency of 6.7% with a high open-circuit voltage of 1.0 V, leading to the E loss as low as 0.49 eV. A systematic study indicates that the driving force in this donor and acceptor system is sufficient for charge generation with the low E loss. This work pushes the minimal E loss of OSCs down to 0.49 eV, approaching the values of some inorganic and hybrid solar cells. It indicates the potential for further enhancement of the performance of OSCs by improving their V oc since the E loss can be minimized.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
conjugated polymers, low band gaps, low energy losses, organic photovoltaics
in
Advanced Energy Materials
volume
6
issue
18
article number
1600148
publisher
Wiley-Blackwell
external identifiers
  • scopus:84979022009
  • wos:000387132200002
ISSN
1614-6832
DOI
10.1002/aenm.201600148
language
English
LU publication?
yes
id
6ed17c75-fd1c-416e-8b9c-d85dd2a27247
date added to LUP
2016-11-01 12:30:59
date last changed
2025-02-09 18:57:48
@article{6ed17c75-fd1c-416e-8b9c-d85dd2a27247,
  abstract     = {{<p>One of the factors limiting the performance of organic solar cells (OSCs) is their large energy losses (E <sub>loss</sub>) in the conversion from photons to electrons, typically believed to be around 0.6 eV and often higher than those of inorganic solar cells. In this work, a novel low band gap polymer PIDTT-TID with a optical gap of 1.49 eV is synthesized and used as the donor combined with PC<sub>71</sub>BM in solar cells. These solar cells attain a good power conversion efficiency of 6.7% with a high open-circuit voltage of 1.0 V, leading to the E <sub>loss</sub> as low as 0.49 eV. A systematic study indicates that the driving force in this donor and acceptor system is sufficient for charge generation with the low E <sub>loss</sub>. This work pushes the minimal E <sub>loss</sub> of OSCs down to 0.49 eV, approaching the values of some inorganic and hybrid solar cells. It indicates the potential for further enhancement of the performance of OSCs by improving their V <sub>oc</sub> since the E <sub>loss</sub> can be minimized.</p>}},
  author       = {{Wang, Chuanfei and Xu, Xiaofeng and Zhang, Wei and Bergqvist, Jonas and Xia, Yuxin and Meng, Xiangyi and Bini, Kim and Ma, Wei and Yartsev, Arkady and Vandewal, Koen and Andersson, Mats R. and Inganäs, Olle and Fahlman, Mats and Wang, Ergang}},
  issn         = {{1614-6832}},
  keywords     = {{conjugated polymers; low band gaps; low energy losses; organic photovoltaics}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{18}},
  publisher    = {{Wiley-Blackwell}},
  series       = {{Advanced Energy Materials}},
  title        = {{Low Band Gap Polymer Solar Cells With Minimal Voltage Losses}},
  url          = {{http://dx.doi.org/10.1002/aenm.201600148}},
  doi          = {{10.1002/aenm.201600148}},
  volume       = {{6}},
  year         = {{2016}},
}