Investigation of Various Thick Copper Phthalocyanine Buffer Layers on Pentacene-Based Organic Thin-Film Transistors

Research output: Contribution to journalArticlepeer-review

Abstract

To systematically study the thickness effect of copper phthalocyanine (CuPc) buffer layers on pentacene-based organic thin-film transistors, various-thick CuPc buffer layers deposited on pentacene channel layers with various deposition rates were designed and studied in the work. By considering the contrary effect of the lower conductivity and the bandgap difference reduction of a CuPc buffer layer inserted between the Au electrode and the pentacene channel layer, the optimal thickness of the CuPc buffer layer stacked on the 50-nm-thick pentacene channel layer of the thin-film transistors was 5 nm. Furthermore, by considering the molecule ordering and quality of pentacene channel layer, the optimal deposition rate of pentacene channel layer of the thin-film transistors was 1.5 Å/s. After measuring the organic thin-film transistors with the optimal parameters, the associated transconductance of 2.4 μS, effective carrier mobility of 0.23 cm2/Vs, threshold voltage of − 5.1 V, subthreshold swing of 1.46 V/dec., and on/off current ratio of 3.7 × 105 were obtained.

Original languageEnglish
Pages (from-to)4818-4822
Number of pages5
JournalJournal of Electronic Materials
Volume47
Issue number8
DOIs
Publication statusPublished - 2018 Aug 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Investigation of Various Thick Copper Phthalocyanine Buffer Layers on Pentacene-Based Organic Thin-Film Transistors'. Together they form a unique fingerprint.

Cite this