Abstract

Organicfield-effect transistors (OFETs) are fundamental building blocks for flexibleand large-area electronics due to their superior solution-processability,flexibility and stretchability. OFETs with high ideality are essential to theirpractical applications. In reality, however, many OFETs still suffer fromnon-ideal behaviors, such as gate-dependent mobility, which thus hinders theextraction of their intrinsic performance. It is much desired to gain acomprehensive understanding on the origins of these non-idealities. OFETs areprimarily interface-related devices, hence their performance and ideality arehighly dependent on the interface properties between each device component.This review will focus on the recent progress in investigating the non-idealbehaviors of OFETs. In particular, the roles of interfaces, including theorganic semiconductor (OSC)/dielectric interface, OSC/electrode interface andOSC/atmosphere interface, in determining the ideality of OFETs are summarized.Viable approaches through interface optimization to improve device ideality arealso reviewed. Finally, an overview of the outstanding challenges as well asthe future development directions for the construction of ideal OFETs areprospected. 

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