Enhanced performance of benzothieno[3,2-b]thiophene (BTT)-based bottom-contact thin-film transistors

Peng Yi Huang, Liang Hsiang Chen, Yu Yuan Chen, Wen Jung Chang, Juin Jie Wang, Kwang Hwa Lii, Jing Yi Yan, Jia Chong Ho, Cheng Chung Lee, Choongik Kim, Ming Chou Chen

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Three new benzothieno[3,2-b]thiophene (BTT; 1) derivatives, which were end-functionalized with phenyl (BTT-P; 2), benzothiophenyl (BTT-BT; 3), and benzothieno[3,2-b]thiophenyl groups (BBTT; 4; dimer of 1), were synthesized and characterized in organic thin-film transistors (OTFTs). A new and improved synthetic method for BTTs was developed, which enabled the efficient realization of new BTT-based semiconductors. The crystal structure of BBTT was determined by single-crystal X-ray diffraction. Within this family, BBTT, which had the largest conjugation of the BTT derivatives in this study, exhibited the highest p-channel characteristic, with a carrier mobility as high as 0.22 cm2 V-1 s-1 and a current on/off ratio of 1×10 7, as well as good ambient stability for bottom-contact/bottom-gate OTFT devices. The device characteristics were correlated with the film morphologies and microstructures of the corresponding compounds.

Original languageEnglish
Pages (from-to)3721-3728
Number of pages8
JournalChemistry - A European Journal
Volume19
Issue number11
DOIs
StatePublished - 11 Mar 2013

Keywords

  • conjugation
  • semiconductors
  • thin films
  • thiophenes
  • transistors

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