Importance of angular mismatch on anisotropic field-effect mobility in solution-processed organic thin-film transistors

Premkumar Vincent

doi:10.1063/1.4977184

Abstract

We demonstrate the influence of angular mismatch on the field-effect mobility in solution-processed organic thin-film transistors based on the study of anisotropic organic semiconductor (OSC) layer characteristics. The mobility alteration caused by angular mismatch was significantly affected by the molecular alignment and crystallinity characteristics. In particular, the sensitivity of mobility increased with angular mismatch. This tendency was more pronounced as the molecular alignment and crystallinity were enhanced. These results clearly show the dependence of the anisotropic mobility properties, which were induced by angular mismatch, on the OSC film characteristics.

Highlights

Solution-processed organic thin-film transistors (OTFTs) are expected to pave the way for low-cost, large-area, flexible electronic applications such as displays, e-paper, electronic skin, and sensors.[1,2] In electronic applications, it is well known that the electrical properties of OTFTs are required to at least match those of amorphous silicon-based TFTs.[3]
Many factors required for electronic applications, such as film properties and electrical performance, are improved by unidirectional coating, further understanding and analysis of the anisotropy characteristics of OTFTs are required for integrated circuits (ICs) because of the following issues
We evaluate the effect of angular mismatch on the field-effect mobility of OTFTs based on an understanding of the organic semiconductors (OSCs) layer characteristics, such as molecular ordering, crystallinity, and morphology, which correspond to the blade-coating speed

Summary

Introduction

Solution-processed organic thin-film transistors (OTFTs) are expected to pave the way for low-cost, large-area, flexible electronic applications such as displays, e-paper, electronic skin, and sensors.[1,2] In electronic applications, it is well known that the electrical properties of OTFTs are required to at least match those of amorphous silicon-based TFTs.[3]. Importance of angular mismatch on anisotropic field-effect mobility in solution-processed organic thin-film transistors

Results

Conclusion