Solution-processed indium-zinc oxide with carrier-suppressing additives

Dong Lim Kim, Woong Hee Jeong, Gun Hee Kim, Hyun Jae Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Metal oxide semiconductors were considered promising materials as backplanes of future displays. Moreover, the adoption of carrier-suppressing metal into indium-zinc oxide (IZO) has become one of the most important themes in the metal oxide research field. In this paper, efforts to realize and optimize IZO with diverse types of carrier suppressors are summarized. Properties such as the band gap of metal in the oxidized form and its electronegativity were examined to confirm their relationship with the metal's carrier-suppressing ability. It was concluded that those two properties could be used as indicators of the carrier-suppressing ability of a material. As predicted by the properties, the alkali earth metals and early transition metals used in the research effectively suppressed the carrier and optimized the electrical properties of the metal oxide semiconductors. With the carrier-suppressing metals, IZO-based thin-film transistors with high (above 1 cm 2/V·s) mobility, a lower than 0.6 V/dec sub-threshold gate swing, and an over 3×10 6 on-to-off current ratio could be achieved.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalJournal of Information Display
Issue number3
Publication statusPublished - 2012 Sept

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Electrical and Electronic Engineering


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