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Impact of Intermolecular Interactions Between a Diketopyrrolopyrrole-Based Conjugated Polymer and Bromobenzaldehyde on Field-Effect Transistors
Macromolecular Research ( IF 2.4 ) Pub Date : 2021-01-08 , DOI: 10.1007/s13233-021-9009-4
Dong Geon Koo , Dabin Lee , Juran Noh , Yong Hyun Lee , Seohyeon Jang , Inho Nam , Tae Joo Shin , Juhyun Park

In this study, intermolecular interactions were investigated for increasing the charge carrier mobility of organic field-effect transistors (OFETs) based on a conjugated polymer. A diketopyrrolopyrrole (DPP)-based conjugated polymer widely used in OFETs, i.e., poly[2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno[3,2-b]thiophene)] (PDPP-DTT), was assembled using 2-bromobenzaldehyde (2-BBA) and used as an active layer for OFETs. Morphological characterization and analysis for non-covalent intermolecular interactions suggested that the halogen bonding between the bromide of 2-BBA and electron-donor group of PDPP-DTT and the association between the electron-acceptor group in 2-BBA and sulfur of PDPP-DTT improved the hole transfer in the PDPP-DTT-based OFETs. The intermolecular interactions resulting from the addition of 2-BBA contributed to the two-fold enhancement of the hole mobility, two-order increase in magnitude of the current on/off ratio, and 50% decrease in the threshold voltage of the OFETs based on PDPP-DPP.



中文翻译:

基于二酮吡咯并吡咯的共轭聚合物与溴苯甲醛的分子间相互作用对场效应晶体管的影响

在这项研究中,研究了分子间的相互作用以增加基于共轭聚合物的有机场效应晶体管(OFET)的电荷载流子迁移率。广泛用于OFET中的基于二酮吡咯并吡咯(DPP)的共轭聚合物,,聚[2,5-(2-辛基十二烷基)-3,6-二酮吡咯并吡咯-alt-5,5-(2,5-二(噻吩-2-基)噻吩并[3,2-b]噻吩)](使用2-溴苯甲醛(2-BBA)组装PDPP-DTT),并用作OFET的活性层。非共价分子间相互作用的形态学表征和分析表明,2-BBA的溴化物与PDPP-DTT的电子给体基团之间的卤素键以及2-BBA的电子受体基团与PDPP-DTT的硫之间的缔合改进了基于PDPP-DTT的OFET中的空穴转移。由添加2-BBA引起的分子间相互作用导致空穴迁移率提高了两倍,电流通/断比的幅度增加了2阶,OFET的阈值电压降低了50%。 PDPP-DPP。

更新日期:2021-01-08
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