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Issue 35, 2018
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A propeller-shaped perylene diimide hexamer as a nonfullerene acceptor for organic solar cells

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Abstract

A novel propeller-shaped molecule (HPB-PDI6) with a hexaphenylbenzene (HPB) core and six peripheral PDI units was synthesized via Co2(CO)8-catalyzed cyclotrimerization and used as an acceptor for organic solar cells (OSCs). The intriguing geometry of the HPB core and the spatial repulsion of the PDI rings created a twisted three-dimensional propeller-shaped conformation for HPB-PDI6. The propeller-shaped conformation could prevent the acceptor molecules from forming large aggregates in the active layer. As expected, the PTB7-Th:HPB-PDI6 blend films show a favorable morphology as well as high and balanced charge carrier mobility. Devices based on PTB7-Th:HPB-PDI6 achieved a PCE of 6.63% with a Voc of 0.92 V, a Jsc of 15.11 mA cm−2, and an FF of 48.0%. Our results have demonstrated that the easily prepared propeller-shaped HPB-PDI6 could be a promising acceptor for high efficiency organic solar cells.

Graphical abstract: A propeller-shaped perylene diimide hexamer as a nonfullerene acceptor for organic solar cells

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Publication details

The article was received on 22 Jun 2018, accepted on 11 Aug 2018 and first published on 14 Aug 2018


Article type: Communication
DOI: 10.1039/C8TC03081B
Citation: J. Mater. Chem. C, 2018,6, 9336-9340
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    A propeller-shaped perylene diimide hexamer as a nonfullerene acceptor for organic solar cells

    J. Liu, S. Xie, S. Feng, M. Li, L. Wu, X. Xu, X. Chen, C. Li and Z. Bo, J. Mater. Chem. C, 2018, 6, 9336
    DOI: 10.1039/C8TC03081B

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