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Inkjet‐Printed Organic Electrodes for Bottom‐Contact Organic Field‐Effect Transistors
Author(s) -
Zhang Jing,
Zhao Yan,
Wei Zhongming,
Sun Yimeng,
He Yudong,
Di Chongan,
Xu Wei,
Hu Wenping,
Liu Yunqi,
Zhu Daoben
Publication year - 2011
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201001583
Subject(s) - materials science , electrode , contact resistance , optoelectronics , organic semiconductor , graphite , field effect transistor , semiconductor , nanotechnology , organic electronics , transistor , layer (electronics) , composite material , electrical engineering , voltage , chemistry , engineering
A graphite thin film was investigated as the drain and source electrodes for bottom‐contact organic field‐effect transistors (BC OFETs). Highly conducting electrodes (10 2 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.