Improved Performance of All‐Polymer Solar Cells Enabled by Naphthodiperylenetetraimide‐Based Polymer Acceptor

Guo, Yikun; Li, Yunke; Awartani, Omar; Han, Han; Zhao, Jingbo; Ade, Harald; Yan, He; Zhao, Dahui

doi:10.1002/adma.201700309

Improved Performance of All‐Polymer Solar Cells Enabled by Naphthodiperylenetetraimide‐Based Polymer Acceptor

Journal Article · Wed May 03 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201700309· OSTI ID:1401543

Guo, Yikun ^[1]; Li, Yunke ^[2]; Awartani, Omar ^[3]; Han, Han ^[1]; Zhao, Jingbo ^[2]; Ade, Harald ^[3]; Yan, He ^[2]; Zhao, Dahui ^[1]

Beijing National Laboratory for Molecular Sciences Department of Applied Chemistry Center for the Soft Matter Science and Engineering and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education College of Chemistry Peking University Beijing 100871 China
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration &, Reconstruction Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong, HKUST‐Shenzhen Research Institute No. 9 Yuexing 1st RD, Hi‐tech Park Nanshan Shenzhen 518057 China
Department of Physics North Carolina State University Raleigh NC 27695 USA

A new polymer acceptor, naphthodiperylenetetraimide‐vinylene (NDP‐V), featuring a backbone of altenating naphthodiperylenetetraimide and vinylene units is designed and applied in all‐polymer solar cells (all‐PSCs). With this polymer acceptor, a new record power‐conversion efficiencies (PCE) of 8.59% has been achieved for all‐PSCs. The design principle of NDP‐V is to reduce the conformational disorder in the backbone of a previously developed high‐performance acceptor, PDI‐V, a perylenediimide‐vinylene polymer. The chemical modifications result in favorable changes to the molecular packing behaviors of the acceptor and improved morphology of the donor–acceptor (PTB7‐Th:NDP‐V) blend, which is evidenced by the enhanced hole and electron transport abilities of the active layer. Moreover, the stronger absorption of NDP‐V in the shorter‐wavelength range offers a better complement to the donor. All these factors contribute to a short‐circuit current density ( J _sc ) of 17.07 mA cm ⁻² . With a fill factor (FF) of 0.67, an average PCE of 8.48% is obtained, representing the highest value thus far reported for all‐PSCs.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1401543

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 26 Vol. 29; ISSN 0935-9648

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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