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Open AccessArticle

Reducing the Nano-Scale Aggregation of Perylene Diimide Based Acceptor by Conjugating a Bridge with a Large Volume

1
College of Life Sciences, Tarim University, Alar 843300, China
2
Department of Chemistry, University of Washington, Seattle, WA 98195, USA
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(10), 640; https://doi.org/10.3390/mi10100640
Received: 2 September 2019 / Revised: 17 September 2019 / Accepted: 19 September 2019 / Published: 24 September 2019
(This article belongs to the Special Issue Organic Electronic Devices)
A novel perylene diimide (PDI) based acceptor P-PDI was synthesized by attaching a phenyl bridge to two octyloxy side chains. With two large volume side chains, the planarity of P-PDI was significantly reduced, leading to weak nano-aggregation of the PDI groups between the different acceptor molecules. Differential scanning calorimetry (DSC) experiments also revealed that P-PDI was amorphous, and demonstrating the aggregation of P-PDI was successfully suppressed. When blended with PTB7-Th to fabricate a polymer solar cell, a power conversation efficiency (PCE) of 2.21% was achieved, demonstrating that a conjugated bridge with a big volume side chain could significantly reduce the nano-scale aggregation of PDI based acceptor materials, which provides a new strategy to synthesize high efficiency acceptors based on PDI. View Full-Text
Keywords: perylene diimide (PDI); nano-scale aggregation; non-fullerene; polymer solar cells; large volume side chains perylene diimide (PDI); nano-scale aggregation; non-fullerene; polymer solar cells; large volume side chains
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MDPI and ACS Style

Chen, J.-Y.; Xia, X.-D.; Zhang, J. Reducing the Nano-Scale Aggregation of Perylene Diimide Based Acceptor by Conjugating a Bridge with a Large Volume. Micromachines 2019, 10, 640.

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