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Determining optimal crystallinity of diketopyrrolopyrrole-based terpolymers for highly efficient polymer solar cells and transistors

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dc.contributor.author Kim, Ki-Hyun ko
dc.contributor.author Park, Sunhee ko
dc.contributor.author Yu, Hojeong ko
dc.contributor.author Kang, Hyunbum ko
dc.contributor.author Song, Inho ko
dc.contributor.author Oh, Joon Hak ko
dc.contributor.author Kim B.J. ko
dc.date.available 2015-01-22T00:01:10Z -
dc.date.created 2015-01-20 ko
dc.date.issued 2014-12 ko
dc.identifier.citation CHEMISTRY OF MATERIALS, v.26, no.24, pp.6963 - 6970 ko
dc.identifier.issn 0897-4756 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/10229 -
dc.description.abstract A new series of conjugated random terpolymers (PDPP2T-Se-Th) was synthesized from an electron-deficient diketopyrrolopyrrole (DPP)-based unit in conjugation with two electron-rich selenophene (Se) and thiophene (Th) species, with a view to inducing different crystalline behaviors of the polymers. The crystallinity of the polymers can be systematically controlled by tuning the ratio between Se and Th; an increase in Se content induced a remarkable increase in the melting and crystallization temperatures as well as the crystallinity of the PDPP2T-Se-Th terpolymers. These changes in the crystalline properties of polymers had a dramatic effect on the performances of organic field-effect transistors (OFETs) and polymer solar cells (PSCs). However, their effect on each type of devices was very different. The charge carrier mobilities of the PDPP2T-Se-Th terpolymers in OFET devices increased remarkably as the Se content increased in the polymers, showing that PDPP2T-Se100 with Se/Th ratio = 100/0 had very high hole and electron mobilities (4.72 and 5.54 cm2 V-1 s-1, respectively) with well-balanced ambipolar property. In contrast, the best power conversion efficiency (PCE) of 7.2% was observed for the PDPP2T-Se10-Th90 polymers that had Se/Th ratio of 10/90 due to the synergistic contributions from high charge mobility and optimized bulk-heterojunction (BHJ) morphology with fullerene acceptors. To understand the effects of the crystallinity of random terpolymers on their performances in OTFTs and PSCs, we systematically investigated the effects of the Se/Th compositions on their optical, electrical, and structural properties. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Determining optimal crystallinity of diketopyrrolopyrrole-based terpolymers for highly efficient polymer solar cells and transistors ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84919781973 ko
dc.identifier.wosid 000347139700010 ko
dc.type.rims ART ko
dc.description.wostc 17 *
dc.description.scopustc 14 *
dc.date.tcdate 2015-12-28 *
dc.date.scptcdate 2015-11-04 *
dc.identifier.doi 10.1021/cm502991d ko
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