Lithium ion assisted hydration of metal ions in non-aqueous sol-gel inks for high performance metal oxide thin-film transistors

Jee Ho Park, Jin Young Oh, Hong Koo Baik, Tae Il Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The role of Li ions in lowering the dehydroxylation temperature of non-aqueous sol-gel inks for metal oxide thin film transistors (TFTs) was demonstrated for the first time. As a key mechanism in the lowering of the dehydroxylation temperature, the hydration of sol-gel inks by Li ions, which have a high charge density, was verified through various material analysis tools, such as Raman spectroscopy, TG-DTA, spectroscopic ellipsometry, XPS, and FT-IR. The hydration effect of Li ions on electronic properties was confirmed. This was done by evaluating the electrical properties of metal oxide TFTs that were fabricated at 300°C using various kinds of sol-gel inks with and without Li ions. The results revealed that the dehydroxylation temperature was typically lowered by about 20 to 50°C with the addition of Li ions to various kinds of non-aqueous sol-gel inks. Moreover, the Li-added metal oxide TFTs had mobilities that were several times higher than those of their undoped counterparts.

Original languageEnglish
Pages (from-to)6276-6283
Number of pages8
JournalJournal of Materials Chemistry C
Volume3
Issue number24
DOIs
Publication statusPublished - 2015 Jun 28

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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