High Performance All-Polymer Solar Cell via Polymer Side-Chain Engineering

Yan Zhou, Tadanori Kurosawa, Wei Ma, Yikun Guo, Lei Fang, Koen Vandewal, Ying Diao, Chenggong Wang, Qifan Yan, Julia Reinspach, Jianguo Mei, Anthony Lucas Appleton, Ghada I. Koleilat, Yongli Gao, Stefan C. B. Mannsfeld, Alberto Salleo, Harald Ade, Dahui Zhao, Zhenan Bao

Research output: Contribution to journalArticlepeer-review

303 Scopus citations

Abstract

An average PCE of 4.2% for all-polymer solar cells from 20 devices with an average J SC of 8.8 mA cm-2 are obtained with a donor-acceptor pair despite a low LUMO-LUMO energy offset of less than 0.1 eV. Incorporation of polystyrene side chains into the donor polymer is found to assist in reducing the phase separation domain length scale, and results in more than 20% enhancement of PCE. We observe a direct correlation between the short circuit current (J SC) and the length scale of BHJ phase separation, which is obtained by resonance soft X-ray scattering. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)3767-3772
Number of pages6
JournalAdvanced Materials
Volume26
Issue number22
DOIs
StatePublished - Mar 24 2014
Externally publishedYes

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