Non-halogenated solution-processed ambipolar plastic transistors based on conjugated polymers prepared by asymmetric donor engineering

Abstract

Ambipolar polymeric semiconductors based on a diketopyrrolopyrrole backbone that can be solution-processed using non-chlorinated solvents are reported.

Enhancing the Solubility of Semiconducting Polymers in Eco-Friendly Solvents with Carbohydrate-Containing Side Chains

“…Several investigations of the processing of π-conjugated polymers in greener aromatic solvents, such as o- anisole, in combination with the utilization of small-molecule additives have been reported. , New chemical designs and strategies have also been developed to improve solubility in alcohols and water. These include side-chain engineering with ionic moieties, , nonionic moieties, , and the incorporation of nonconjugated moieties (conjugation breaking units) that reduces the crystallinity of the polymer . Among these reports, Woo et al have recently reported the synthesis of a novel nonionic conjugated polymer incorporating branched oligoethylene glycol (OEG) side chains .…”

“…These include side-chain engineering with ionic moieties, 25,26 nonionic moieties, 27,28 and the incorporation of nonconjugated moieties (conjugation breaking units) that reduces the crystallinity of the polymer. 29 Among these reports, Woo et al have recently reported the synthesis of a novel nonionic conjugated polymer incorporating branched oligoethylene glycol (OEG) side chains. 30 This polymer was shown to be highly soluble in ethanol and was directly utilized for the fabrication of OFET and OPV devices using ethanol as a processing solvent.…”

Advances in environmentally-friendly organic thermoelectric and organic thin-film transistor materials

“…尽管上述两种策略可以提高有机半导体在绿色溶 剂中的溶解度, 但是一定程度上降低材料的结晶性, 另 外, 无规共聚物的不可控性会降低实验重复性 [41] . 因 此, 为了减弱聚合物分子间偶极相互作用, 研究人员 引入非对称单体, 降低分子不对称性, 进而提高溶解 度 [28,42] . 2019年, Song等 [42] 利用Stille共聚制备了具有…”

“…有机半导体的性能与聚集态结构密切相关, 而溶 剂的挥发速率、浸润性、极性等都会对材料的结晶性 造成影响, 因此, 采用绿色溶剂替代卤代溶剂时, 有时 需要加入添加剂来调整材料的聚集态结构 [42,61] . 2019 年, Song等 [42] 使用DMSO作为添加剂, 高沸点DMSO 的加入延长了分子的组装时间, 有利于聚合物的结晶 近年来, 制备了一系列高性能的可溶于绿色溶剂 的有机半导体材料(图7a) [55,58,62] . 例如, 2019年, Yang课题 组 [63] 通过调控DPP类共聚物中二噻吩亚乙烯(TVT)和 硒吩(Se)的比例, 制备的DPP-ran-Se/TVT在2-甲基四 氢呋喃中具有良好的溶解性.…”

Diketopyrrolopyrrole-based conjugated polymers synthesized by direct arylation polycondensation for anisole-processed high mobility organic thin-film transistors

“…24–26 In the above context, some DPP-based high mobility CPs processible with non-halogenated solvents, such as toluene, xylene, tetralin and tetrahydrofuran (THF), were also reported. 27–38 Lowering the regularity is generally adopted as an effective method to enhance the solubility of CPs. 27–29,39 For instance, Li et al reported toluene-processed DPP-based high mobility CPs with decreased regioregularity.…”