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Issue 20, 2017
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Simple adjustments to the molecular planarity of organic sensitizers: towards highly selective optimization of energy levels

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Abstract

As a key property, the energy levels of organic sensitizers generally cannot be adjusted with good selectivity and high efficiency. Thus, a new regulation strategy is urgently needed. Herein, by simply replacing phenyl by a thienyl unit in a π-bridge segment, two novel quinoxaline sensitizers, CS-9 and CS-10, based on D–A–π–A construction have been designed and synthesized. With this simple modification, the planarity of the auxiliary acceptor-to-acceptor part is effectively improved. Along with this specified planarization of the molecule, the LUMO levels of the dyes are selectively stabilized. Our results demonstrate that the planarity adjustment to a specified molecular structure is obviously preferred to selectively optimize the energy levels and photovoltaic performances of the sensitizer, providing a powerful strategy for the development of highly efficient organic sensitizers in the future.

Graphical abstract: Simple adjustments to the molecular planarity of organic sensitizers: towards highly selective optimization of energy levels

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Publication details

The article was received on 14 Jun 2017, accepted on 06 Sep 2017 and first published on 07 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02127E
Citation: New J. Chem., 2017,41, 11853-11859
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    Simple adjustments to the molecular planarity of organic sensitizers: towards highly selective optimization of energy levels

    R. Wang, Q. Chen, H. Feng and B. Liu, New J. Chem., 2017, 41, 11853
    DOI: 10.1039/C7NJ02127E

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