Graphene-based electrodes for enhanced organic thin film transistors based on pentacene

Sarbani Basu, Mu Chen Lee, Yeong-Her Wang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

This paper presents 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) and pentacene-based organic thin film transistors (OTFTs) with monolayer graphene source-drain (S-D) electrodes. The electrodes are patterned using conventional photolithographic techniques combined with reactive ion etching. The monolayer graphene film grown by chemical vapor deposition on Cu foil was transferred on a Si dioxide surface using a polymer-supported transfer method to fabricate bottom-gate, bottom-contact OTFTs. The pentacene OTFTs with graphene S-D contacts exhibited superior performance with a mobility of 0.1 cm2 V-1 s-1 and an on-off ratio of 105 compared with OTFTs with Au-based S-D contacts, which had a mobility of 0.01 cm2 V-1 s-1 and an on-off ratio of 103. The crystallinity, grain size, and microscopic defects (or the number of layers of graphene films) of the TIPS-pentacene/pentacene films were analyzed by X-ray diffraction spectroscopy, atomic force microscopy, and Raman spectroscopy, respectively. The feasibility of using graphene as an S-D electrode in OTFTs provides an alternative material with high carrier injection efficiency, chemical stability, and excellent interface properties with organic semiconductors, thus exhibiting improved device performance of C-based electronic OTFTs at a reduced cost.

Original languageEnglish
Pages (from-to)16701-16710
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number31
DOIs
Publication statusPublished - 2014 Jul 16

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Graphite
Thin film transistors
graphene
transistors
Electrodes
electrodes
thin films
Monolayers
Gates (transistor)
Semiconducting organic compounds
carrier injection
Chemical stability
Reactive ion etching
organic semiconductors
dioxides
Metal foil
Raman spectroscopy
pentacene
Chemical vapor deposition
foils

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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abstract = "This paper presents 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene) and pentacene-based organic thin film transistors (OTFTs) with monolayer graphene source-drain (S-D) electrodes. The electrodes are patterned using conventional photolithographic techniques combined with reactive ion etching. The monolayer graphene film grown by chemical vapor deposition on Cu foil was transferred on a Si dioxide surface using a polymer-supported transfer method to fabricate bottom-gate, bottom-contact OTFTs. The pentacene OTFTs with graphene S-D contacts exhibited superior performance with a mobility of 0.1 cm2 V-1 s-1 and an on-off ratio of 105 compared with OTFTs with Au-based S-D contacts, which had a mobility of 0.01 cm2 V-1 s-1 and an on-off ratio of 103. The crystallinity, grain size, and microscopic defects (or the number of layers of graphene films) of the TIPS-pentacene/pentacene films were analyzed by X-ray diffraction spectroscopy, atomic force microscopy, and Raman spectroscopy, respectively. The feasibility of using graphene as an S-D electrode in OTFTs provides an alternative material with high carrier injection efficiency, chemical stability, and excellent interface properties with organic semiconductors, thus exhibiting improved device performance of C-based electronic OTFTs at a reduced cost.",
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Graphene-based electrodes for enhanced organic thin film transistors based on pentacene. / Basu, Sarbani; Lee, Mu Chen; Wang, Yeong-Her.

In: Physical Chemistry Chemical Physics, Vol. 16, No. 31, 16.07.2014, p. 16701-16710.

Research output: Contribution to journalArticle

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