A nonchlorinated solvent-processed polymer semiconductor for high-performance ambipolar transistors

作     者：Jie Yang Yaqian Jiang Zhiyuan Zhao Xueli Yang Zheye Zhang Jinyang Chen Junyu Li Wei Shi Shuai Wang Yunlong Guo Yunqi Liu Jie Yang;Yaqian Jiang;Zhiyuan Zhao;Xueli Yang;Zheye Zhang;Jinyang Chen;Junyu Li;Wei Shi;Shuai Wang;Yunlong Guo;Yunqi Liu

作者机构：Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2022年第9卷第4期

页      面：139-147页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (61890940, 21922511, 91833306,91833304, 21633012 and 51873216) the National Basic Research Program of China (2018YFA0703200, 2016YFA0200101and 2016YFB0401102) the CAS Key Research Program of Frontier Sciences (QYZDY-SSW-SLH029) the StrategicPriority Research Program of the Chinese Academy of Sciences(XDB30000000) 

主　　题：nonchlorinated solvent high performance ambipolar transistor alignment 

摘      要：Ambipolar polymer semiconductors are potentially serviceable for logic circuits, light-emitting field-effect transistors(LFETs) and polymer solar cells(PSCs). Although several high-performance ambipolar polymers have been developed, their optoelectronic devices are generally processed from toxic chlorinated solvents. To achieve the commercial applications of organic FETs(OFETs), the polymers should be processed from nonchlorinated solvents, instead of chlorinated solvents. However, most conjugated polymers show poor solubility in nonchlorinated solvents. It is of great importance to develop ambipolar polymers that can be processed from nonchlorinated solvents. Here, we develop a nonchlorinated solvent processed polymer named poly[7-fluoro-N, N′-di(4-decyltetradecyl)-7′-azaisoindigo-6′,6′′-(thieno[3,2-b]thiophene-2,5-diyl)-7′′′-fluoro-N′′, N′′′-di(4-decyltetradecyl)-7′′-azaisoindigo-6,6′′′-([2,2′′-bithiophene]-5,5′′-diyl)](PITTI-BT) by designing a monomer with a large molar mass. The polymer displays good solubility in p-xylene(PX). Well-aligned films of PITTI-BT are achieved by an off-center spin-coating(SC) method. Based on the high-quality films, the OFETs fabricated from PX solution achieve record ambipolar performance with hole and electron mobilities of 3.06 and2.81 cm~2 V-1s-1, respectively. The combination of nonchlorinated solvents and good alignment process offers an effective and eco-friendly approach to obtain high-performance ambipolar transistors.