Electrical properties of magnesium incorporated zinc tin oxide thin film transistors by solution process

In Young Jeon, Ji Yoon Lee, Dae Ho Yoon

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Zinc tin oxide (ZTO) films were fabricated on SiO2/Si substrate as a function of Mg concentration (the ratio of 3 to 10 atomic%) using a spin-coating process. For the characterization of thin film transistors (TFTs), Zn0.3Sn0.7O channel TFT exhibited a higher on/off ratio compared to Zn0.5 Sn0.5O channel TFT because the higher Sn concentration can induce more charge carriers. 3 atomic% Mg incorporated Zn0.3Sn0.7O channel TFTs showed stable electrical performances such as Ion/off ∼ 1×107, μsat = 1.40 cm2 V-1 s-1, and S = 0.39 V/decade. However, 10 atomic% Mg incorporated Zn0.3Sn0.7O channel TFTs deteriorated their electrical performances due to Mg segregation. The Mg incorporated Zn0.3Sn0.7O channel TFTs effectively suppress off-current and threshold voltage change during positive gate bias stress due to their strong bonding with oxygen.

Original languageEnglish
Pages (from-to)1741-1745
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume13
Issue number3
DOIs
StatePublished - Mar 2013

Keywords

  • Magnesium zinc tin oxide
  • Oxide semiconductor
  • Sol-gel
  • Thin film transistor

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