An ambipolar to n-type transformation in pentacene-based organic field-effect transistors

Jer Wei Chang, Po Wei Liang, Min Wei Lin, Tzung Fang Guo, Ten Chin Wen, Yao Jane Hsu

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We report an ambipolar to n-type transformation in pentacene-based organic field-effect transistors (OFETs) of aluminum (Al) source-drain electrodes. The hole currents of the ambipolar OFETs were decreased by over two orders of magnitude within 24 h after the device fabrication, but the electron currents remained unchanged, which makes the devices present n-type only characteristics. The transformation is correlated with the interfacial interactions between Al electrodes and pentacene, as characterized by analyzing near-edge X-ray absorption fine structure spectra and Micro-Raman spectra. This study highlights the importance of metal/organic interfaces in the performance of OFETs, and demonstrates decent n-type pentacene-based OFETs with electron mobility of 0.1 cm2/V/s with proper annealing treatment.

Original languageEnglish
Pages (from-to)509-515
Number of pages7
JournalOrganic Electronics
Volume12
Issue number3
DOIs
Publication statusPublished - 2011 Mar

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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