Inkjet‐Printed Organic Electrodes for Bottom‐Contact Organic Field‐Effect Transistors |
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Authors: | Jing Zhang Yan Zhao Zhongming Wei Yimeng Sun Yudong He Chong‐an Di Wei Xu Wenping Hu Yunqi Liu Daoben Zhu |
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Affiliation: | 1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;2. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
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Abstract: | A graphite thin film was investigated as the drain and source electrodes for bottom‐contact organic field‐effect transistors (BC OFETs). Highly conducting electrodes (102 S cm?1) at room temperature were obtained from pyrolyzed poly(l,3,4‐oxadiazole) (PPOD) thin films that were prepatterned with a low‐cost inkjet printing method. Compared to the devices with traditional Au electrodes, the BC OFETs showed rather high performances when using these source/drain electrodes without any further modification. Being based on a graphite‐like material these electrodes possess excellent compatibility and proper energy matching with both p‐ and n‐type organic semiconductors, which results in an improved electrode/organic‐layer contact and homogeneous morphology of the organic semiconductors in the conducting channel, and finally a significant reduction of the contact resistance and enhancement of the charge‐carrier mobility of the devices is displayed. This work demonstrates that with the advantages of low‐cost, high‐performance, and printability, PPOD could serve as an excellent electrode material for BC OFETs. |
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Keywords: | Inkjet printing Electrodes Organic field‐effect transistors Thin films Graphite |
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