Solution-processed organic crystals for field-effect transistor arrays with smooth semiconductor/dielectric interface on paper substrates

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• 作者：Yun Li^a ; Chuan Liu^a ; Yong Xu^a ; Takeo Minari^a ; Peter Darmawan^a ; Kazuhito Tsukagoshi^a ; ^b ; ^{TSUKAGOSHI.Kazuhito@nims.go.jp}
• 关键词：Surface roughness reduction ; Small-molecule organic crystals ; Organic field-effect transistor arrays ; Solution-processed ; Patterning ; Paper electronics
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：May, 2012
• 卷：13
• 期：5
• 页码：815-819
• 文件大小：933 K

摘要

Large surface roughness is a major obstacle for electronic systems fabricated on paper substrates. Here, a mixture solution of organic semiconductor and polymer dielectric was spin-coated on paper substrate with a patterned wettability. This spin-coating process produced organic crystals and a very smooth semiconductor/dielectric interface with a low trap density in well-confined patterns. Despite the large roughness of the paper substrate, the fabricated transistor arrays exhibited high performance with a field-effect mobility reaching 1.3 cm²/V s and an on/off ratio of 10⁸. The presented results offer a simple fabrication method for the current rapidly developing technology of paper electronics.