Solution-Processed Ambipolar Organic Thin-Film Transistors by Blending p- and n-Type Semiconductors: Solid Solution versus Microphase Separation
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摘要Here, we report solid solution of p- and n-type organic semiconductors as a new type of p-n blend for solution-processed ambipolar organic thin film transistors (OTFTs). This study compares the solid-solution films of silylethynylated tetraazapentacene 1 (acceptor) and silylethynylated pentacene 2 (donor) with the microphase-separated films of 1 and 3, a heptagon-embedded analogue of 2. It is found that the solid solutions of (1)(0.5)(2)(1-x) function as ambipolar semiconductors, whose hole and electron mobilities are tunable by varying the ratio of 1 and 2 in the solid solution. The OTFTs of (1)(0.5)(2)(0.5) exhibit relatively balanced hole and electron mobilities comparable to the highest values as reported for ambipolar OTFTs of stoichiometric donor acceptor cocrystals and microphase-separated p-n bulk heterojunctions. The solid solution of (1)(0.5)(2)(0.5) and the microphase-separated blend of 1:3 (0.5:0.5) in OTFTs exhibit different responses to light in terms of absorption and photoeffect of OTFTs because the donor and acceptor are mixed at molecular level with pi-pi stacking in the solid solution.
著者Xu XM, Xiao T, Gu X, Yang XJ, Kershaw SV, Zhao N, Xu JB, Miao Q
期刊名稱ACS Applied Materials and Interfaces
詳細描述vol. 7
出版年份2015
月份12
日期30
卷號7
期次51
出版社AMER CHEMICAL SOC
頁次28019 - 28026
國際標準期刊號1944-8244
電子國際標準期刊號1944-8252
語言英式英語
關鍵詞ambipolar; microphase separation; organic semiconductors; organic thin film transistors; solid solution
Web of Science 學科類別Materials Science; Materials Science, Multidisciplinary; Nanoscience & Nanotechnology; Science & Technology - Other Topics

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