摘要
Understanding the structure-performance relationship is crucial for optimizing the performance of organic thin film transistors. Here, two interface modification methods wereapplied to modulate the thin film morphology of the organic semiconductor, 6,13-bis（triisopropylsilylethynyl）pentacene（TIPS-pentacene）. The resulting different film morphologies and packing structures led to distinct charge transport abilities. A substantial 40-fold increase in charge carrier mobility was observed on the octadecyltrichlorosilane（OTS）-modified sample compared to that of the transistor on the bare substrate. A better charge mobility greater than 1 cm^2· V^-1· s^-1 is realized on the p-sexiphenyl（p-6P）- modified transistors due to the large grain size, good continuity and, importantly, the intimate π-π packing in each domain.
Understanding the structure-performance relationship is crucial for optimizing the performance of organic thin film transistors. Here, two interface modification methods wereapplied to modulate the thin film morphology of the organic semiconductor, 6,13-bis（triisopropylsilylethynyl）pentacene（TIPS-pentacene）. The resulting different film morphologies and packing structures led to distinct charge transport abilities. A substantial 40-fold increase in charge carrier mobility was observed on the octadecyltrichlorosilane（OTS）-modified sample compared to that of the transistor on the bare substrate. A better charge mobility greater than 1 cm^2· V^-1· s^-1 is realized on the p-sexiphenyl（p-6P）- modified transistors due to the large grain size, good continuity and, importantly, the intimate π-π packing in each domain.
基金
Supported by the National Natural Science Foundation of China（Nos. 11304213, 51503138, 21527805）, and the China Postdoctoral Science Foundation（Nos.2014M550304, 2015M581856, 2015T80579）.
