Very Large Silacylic Substituent Effects on Response in Silole-Based Polymer Transistors
作者:Hui Huang、Jangdae Youn、Rocio Ponce Ortiz、Yan Zheng、Antonio Facchetti、Tobin Marks
DOI:10.1021/cm200009k
日期:2011.4.26
contacts, and enhances the charge-transport capacity of the oligomers. Oligomer 3,3′-dihexylsilylene-2,2′:5,2′′:5′,2′′′:5′′,2′′′′:5′′′,2′′′′′-sexithiophene (SM5) with two Si-n-hexyl substituents is not FET-active, while the mobilities of 3,3′-cyclopentanylsilylene-2,2′:5,2′′:5′,2′′′:5′′,2′′′′:5′′′,2′′′′′′-sexithiophene (SM4) and 3,3′-cyclobutysilylene-2,2′:5,2′′:5′,2′′′:5′′,2′′′′:5′′′,2′′′′′-sexithiophene
理解分子结构与有机薄膜晶体管性能之间的相互关系是实现新型有机半导体并实现卓越器件特性的关键。本文中,我们报告了二噻吩甲硅醇基低聚物和具有硅杂环烷基取代基的共聚物在有机场效应晶体管(OFET)中的合成,表征和电荷传输性质。甲硅烷基硅原子上烷基取代基的硅环化可减少空间位阻,使固态分子间π-π接触收缩,并增强低聚物的电荷传输能力。低聚物3,3'-二己基甲硅烷基-2,2':5,2'':5',2''':5'',2'''':5''',2'''''-sexithiophene (SM5)具有两个Si- n-己基取代基不具有FET活性,而3,3'-环戊基甲硅烷基-2,2':5,2'':5',2''':5',2'''':5的迁移率′′′,2′′′′′′′-sethiothiophene(SM4)和3,3′′- cyclobutysilylene-2,2′:5,2′′:5′,2′′′:5′′,2′′ ′′:5