Solution processable poly(2,5-dialkyl-2,5-dihydro-3,6-di-2-thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione) for ambipolar organic thin film transistors

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• 作者：Yuning Li ; Bin Sun ; Prashant Sonar ; Samarendra P. Singh
• 关键词：Organic thin film transistors ; Organic field effect transistors ; Organic electronics ; Printed organic electronics ; Ambipolar polymer semiconductors ; Ambipolar transistors
• 刊名：Organic Electronics
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：13
• 期：9
• 页码：1606-1613
• 全文大小：444 K

文摘

Solution processable diketopyrrolopyrrole (DPP)-bithiophene polymers (PDBT) with long branched alkyl side chains on the DPP unit are synthesized. These polymers have favourable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels for the injection and transport of both holes and electrons. Organic thin film transistors (OTFTs) using these polymers as semiconductors and gold as source/drain electrodes show typical ambipolar characteristics with very well balanced high hole and electron mobilities (¦Ì_h = 0.024 cm² V^?1 s^?1 and ¦Ì_e = 0.056 cm² V^?1 s^?1). These simple and high-performing polymers are promising materials for ambipolar organic thin film transistors for low-cost CMOS-like logic circuits.