Polymer blended small molecule organic field effect transistors with improved device-to-device uniformity and operational stability

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• 作者：Yong-Hoon Kim^a ; John E. Anthony^b ; Sung Kyu Park^c ; ^{skpark@cau.ac.kr}
• 关键词：Organic field effect transistor ; Polymer blending ; Device-to-device uniformity ; Operational stability
• 刊名：Organic Electronics
• 出版年：2012
• 期刊代码：137_15661199
• 类别：et
• 出版时间：July, 2012
• 卷：13
• 期：7
• 页码：1152-1157
• 文件大小：1550 K

摘要

We report high performance organic thin-film transistors (OTFTs) with improved device-to-device uniformity and operational stability using polymer-blended small molecule organic semiconductor, 2,8-difluoro-5,11-bis(triethylsilylethynyl) anthradithiophene (diF-TESADT). The diF-TESADT blended with poly(伪-methylstyrene) was spin-cast to form bottom-contact OTFTs, and an average carrier mobility of more than 0.16 cm²/V s with more uniform surface morphology and device-to-device uniformity compared to neat diF-TESADT devices were achieved. Additionally, the polymer-blended OTFTs have shown improved operational stability under gate bias-stress possibly due to blocking of ambient oxygen and moisture by vertically separated insulating matrix polymer.