Bias stress stable aqueous solution derived Y-doped ZnO thin film transistors

Taehwan Jun, Keunkyu Song, Yangho Jung, Sunho Jeong, Jooho Moon

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

We demonstrate solution processed oxide semiconductor thin-film transistors (TFTs) with high performance as well as improved electrical/thermal temperature stress stabilities. Yttrium-doped ZnO (YZO) TFTs are fabricated using aqueous precursors prepared via direct dissolution of metal hydroxides. The Y contents in YZO films are critical for determining the intrinsic electrical properties as well as the positive bias stress-, negative bias stress-, and negative bias temperature stress-induced instabilities. Solution processed 1% Y-doped ZnO TFT annealed at 350 °C exhibits a noticeably lower threshold voltage shift of 3.78 V under positive bias stress and -1.72 V under negative bias temperature stress as well as the good device performance with a mobility of ∼1.8 cm2 V-1 s-1 and an on/off current ratio of ∼107. Our results suggest that solution processed Y-doped ZnO TFTs have potential for use in high stability performance applications in transparent devices.

Original languageEnglish
Pages (from-to)13524-13529
Number of pages6
JournalJournal of Materials Chemistry
Volume21
Issue number35
DOIs
Publication statusPublished - 2011 Sep 21

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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