D–A–D-type narrow-bandgap small-molecule photovoltaic donors: pre-synthesis virtual screening using density functional theory

Literature Information

Publication Date 2016-04-29
DOI 10.1039/C5CP07536J
Impact Factor 3.676
Authors

Yeongrok Gim, Daekyeom Kim, Minkyu Kyeong, Seunghwan Byun, Yuri Park, Sooncheol Kwon, Heejoo Kim, Yves Lansac, Yun Hee Jang


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Abstract

A new series of D–A–D-type small-molecule photovoltaic donors are designed and virtually screened before synthesis using time-dependent density functional theory calculations carefully validated against various polymeric and molecular donors. In this series of new design, benzodithiophene is kept as D to achieve the optimum highest-occupied molecular orbital energy level, while thienopyrroledione is initially chosen as A but later replaced by difluorinated benzodiathiazole or its selenide derivative to achieve the optimum band gap. The D–A–D core is end-capped by pyridone units which could not only enhance their self-assembly via hydrogen bonds but also play a role as an acceptor (A′) to form an extended A′–D–A–D–A′ small-molecule donor.

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