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Vertical phase separation in bulk heterojunction solar cells formed by in situ polymerization of fulleride.

Authors
  • Zhang, Lipei
  • Xing, Xing
  • Zheng, Lingling
  • Chen, Zhijian
  • Xiao, Lixin
  • Qu, Bo
  • Gong, Qihuang
Type
Published Article
Journal
Scientific Reports
Publisher
Springer Nature
Publication Date
Jan 01, 2014
Volume
4
Pages
5071–5071
Identifiers
DOI: 10.1038/srep05071
PMID: 24861168
Source
Medline
License
Unknown

Abstract

Vertical phase separation of the donor and the acceptor in organic bulk heterojunction solar cells is crucial to improve the exciton dissociation and charge transport efficiencies. This is because whilst the exciton diffusion length is limited, the organic film must be thick enough to absorb sufficient light. However, it is still a challenge to control the phase separation of a binary blend in a bulk heterojunction device architecture. Here we report the realization of vertical phase separation induced by in situ photo-polymerization of the acrylate-based fulleride. The power conversion efficiency of the devices with vertical phase separation increased by 20%. By optimising the device architecture, the power conversion efficiency of the single junction device reached 8.47%. We believe that in situ photo-polymerization of acrylate-based fulleride is a universal and controllable way to realise vertical phase separation in organic blends.

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