Spontaneous Formation of an Ideal-Like Field-Effect Channel for Decay-Free Polymeric Thin-Film Transistors by Multiple-Scale Phase Separation

Horng Long Cheng, Jr Wei Lin, Jrjeng Ruan, Chia Hsien Lin, Fu Chiao Wu, Wei Yang Chou, Ching Hsiang Chen, Chung Kai Chang, Hwo Shuenn Sheu

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

We demonstrate semiconducting polymer-based thin-film transistors (PTFTs) with fast switching performance and an uncommon nondecaying feature. These PTFTs based on widely studied poly(3-hexylthiophene) are developed by incorporating the insulating polymer into the active channel and subjecting the compound to specific, spontaneous multiple-scale phase separation (MSPS). An in-depth study is conducted on the interfacial and phase-separated microstructure of the semiconducting/insulating blending active layer and its effect on the electrical characteristics of PTFTs. The polyblends exhibit a confined crystallization behavior with continuously semiconducting crystalline domains between scattered insulator-rich domains. The insulator-rich domains can block leakage current and strengthen the gate control of the channel. A small amount of the insulating polymer penetrates the bottom of the active channel, resulting in effective interface modification. We show specific MSPS morphology of the present blending films to reduce charge trapping effects, enhance charge accumulation, and create a high-seed switching channel. The findings enable us to develop the required morphological conceptual model of the ideal-like field-effect-modulated polymer-based active channel. The polyblend-based PTFTs with MSPS morphology also have promising sensing functions. This study offers an effective approach for overcoming the major drawbacks (instability and poor switching) of PTFTs, thus allowing such transistors to have potential applications.

原文English
頁(從 - 到)16486-16494
頁數9
期刊ACS Applied Materials and Interfaces
7
發行號30
DOIs
出版狀態Published - 2015 八月 5

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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