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Issue 16, 2019
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Dithienocyclopentadibenzothiophene: a C2v-symmetric core for nonfullerene acceptors with tunable bandgaps

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Abstract

The electron-donating core is one of key components in constructing high-performance nonfullerene acceptors for organic solar cells (OSCs). Herein, dithienocyclopentadibenzothiophene (DTCDBT), a C2v-symmetric core, was for the first time used to design and synthesize efficient nonfullerene acceptors (DBTTC, DBTIC and DBTIC-2F) with various bandgaps in combination with different electron-withdrawing terminal units. When the nonfullerene acceptors were used to fabricate OSCs with a wide-bandgap polymer donor (PBDB-T), the DBTTC-based device exhibited an impressive power conversion efficiency (PCE) of 11.25%. While the DBTIC- and DBTIC-2F-based devices showed lower PCEs of 9.66% and 6.81%, respectively. The results afford a useful rational design strategy as well as a new C2v-symmetric building block for nonfullerene acceptors which can be used for further advancing the PCEs of photovoltaic devices.

Graphical abstract: Dithienocyclopentadibenzothiophene: a C2v-symmetric core for nonfullerene acceptors with tunable bandgaps

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Publication details

The article was received on 08 Mar 2019, accepted on 26 Mar 2019 and first published on 02 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02544H
J. Mater. Chem. A, 2019,7, 9609-9617

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    Dithienocyclopentadibenzothiophene: a C2v-symmetric core for nonfullerene acceptors with tunable bandgaps

    C. Tang, D. Cai and Q. Zheng, J. Mater. Chem. A, 2019, 7, 9609
    DOI: 10.1039/C9TA02544H

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