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Issue 26, 2017
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n-Type conjugated electrolytes cathode interlayer with thickness-insensitivity for highly efficient organic solar cells

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Abstract

Two novel amphipathic small molecular conjugated electrolytes (SMCEs) with self-doping effect were successfully synthesized by incorporating diketopyrrolopyrrole (DPP) as n-type backbone and amine-based groups as polar pendants. In favor of the n-type backbone and amine-based groups, an obvious n-type doping was obtained, resulting in the dramatically improved conductivity of the SMCEs. The formation of the polar group induced dipoles at the SMCEs/Al interface to provide a favorable energy for cathode. Subsequently, the two small molecule electrolytes as cathode interlayers have been successfully applied in the polymer solar cells (PSCs) with a wide thickness range from 7–33 nm. A notable power conversion efficiency (PCE) of 10.2% for PSCs were achieved. And the two SMCEs also showed a good universality with substantial performance. These findings indicate that these small molecular conjugated electrolytes are promising candidates as cathode interlayers for highly efficient polymer solar cells.

Graphical abstract: n-Type conjugated electrolytes cathode interlayer with thickness-insensitivity for highly efficient organic solar cells

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Publication details

The article was received on 20 Mar 2017, accepted on 31 May 2017 and first published on 31 May 2017


Article type: Paper
DOI: 10.1039/C7TA02444D
Citation: J. Mater. Chem. A, 2017,5, 13807-13816
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    n-Type conjugated electrolytes cathode interlayer with thickness-insensitivity for highly efficient organic solar cells

    G. Xu, L. Gao, H. Xu, L. Huang, Y. Xie, X. Cheng, Y. Li, L. Chen and Y. Chen, J. Mater. Chem. A, 2017, 5, 13807
    DOI: 10.1039/C7TA02444D

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