Solution-processable end-functionalized tetrathienoacene semiconductors: Synthesis, characterization and organic field effect transistors applications

Narendra Chary Mamillapalli, Sureshraju Vegiraju, Pragya Priyanka, Chih Yu Lin, Xian Lun Luo, Hsiang Chi Tsai, Shao Huan Hong, Jen Shyang Ni, Wei Chieh Lien, Guhyun Kwon, Shueh Lin Yau, Choongik Kim, Cheng Liang Liu, Ming Chou Chen

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A series of dialkylated tetrathienoacene (TTAR)-based solution-processable small molecular organic semiconductors have been synthesized and characterized for organic field effect transistor (OFET) applications. The central dialkylated TTAR moiety was end-capped with thiophenylvinylthiophene (TVT), bithiophene (bT), and thienothiophene (TT) to afford new π-conjugated p-type active materials, DTVT-TTAR (1), DbT-TTAR (2), and DTT-TTAR (3), respectively. The physical and electrochemical properties and theoretical calculations as well as OFETs performance and thin film morphologies and microstructures of these new soluble TTARs are systematically studied. Using a solution-shearing method, DTVT-TTAR exhibits p-channel transport with the highest mobility of up to 0.18 cm2 V−1s−1 and current ON/OFF ratios of 104-106, which is one of the highest hole mobilities for the solution-processed TTAR-based small molecules.

Original languageEnglish
Pages (from-to)584-590
Number of pages7
JournalDyes and Pigments
Volume145
DOIs
StatePublished - Oct 2017

Keywords

  • Organic field effect transistors
  • Organic semiconductors
  • Solution-shearing
  • Tetrathienoacene
  • Thiophenylvinylthiophene

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