High performance pentacene organic field-effect transistors consisting of biocompatible PMMA/silk fibroin bilayer dielectric

Hai Qiang Li, Jun Sheng Yu*, Wei Huang, Wei Shi, Jiang Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Pentacene organic field-effect transistors (OFETs) based on single- or double-layer biocompatible dielectrics of poly(methyl methacrylate) (PMMA) and/or silk fibroin (SF) are fabricated. Compared with those devices based on single PMMA or SF dielectric or SF/PMMA bilayer dielectric, the OFETs with biocompatible PMMA/SF bilayer dielectric exhibit optimal performance with a high field-effect mobility of 0.21 cm2/Vs and a current on/off ratio of 1.5×104. By investigating the surface morphology of the pentacene active layer through atom force microscopy and analyzing the electrical properties, the performance enhancement is mainly attributed to the crystallization improvement of the pentacene and the smaller interface trap density at the dielectric/organic interface. Meanwhile, a low contact resistance also indicates that a good electrode/organic contact is formed, thereby assisting the performance improvement of the OFET.

Original languageEnglish (US)
Article number038505
JournalChinese Physics B
Volume23
Issue number3
DOIs
StatePublished - Mar 2014

Keywords

  • bilayer dielectric
  • organic filed-effect transistors (OFETs)
  • poly(methyl methacrylate)
  • silk fibroin

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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