Effect of humidity and thermal curing of polymer gate dielectrics on the electrical hysteresis of SnO2 nanowire field effect transistors

Sahngki Hong, Daeil Kim, Gyu-Tae Kim, Jeong Sook Ha

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Electrical properties of SnO2 nanowire (NW) field effect transistor (FET) with polyimide gate dielectrics, prepared by thermal curing of polyamic acid, were investigated. In particular, the effect of humidity and the thermal curing on the electrical hysteresis was systematically studied by taking Fourier-transform infrared spectra of polymer films. Slow polarization of hydroxyl groups/water molecules in the polymer film due to the insufficient curing and the absorbed water molecules under high humidity during the device fabrication was attributed to the hysteresis in the direction opposite to that observed in SnO2 NW FET with SiO2 gate dielectrics.

Original languageEnglish
Article number102906
JournalApplied Physics Letters
Volume98
Issue number10
DOIs
Publication statusPublished - 2011 Mar 7

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curing
humidity
nanowires
field effect transistors
hysteresis
polymers
polyimides
water
molecules
infrared spectra
electrical properties
acids
fabrication
polarization

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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AB - Electrical properties of SnO2 nanowire (NW) field effect transistor (FET) with polyimide gate dielectrics, prepared by thermal curing of polyamic acid, were investigated. In particular, the effect of humidity and the thermal curing on the electrical hysteresis was systematically studied by taking Fourier-transform infrared spectra of polymer films. Slow polarization of hydroxyl groups/water molecules in the polymer film due to the insufficient curing and the absorbed water molecules under high humidity during the device fabrication was attributed to the hysteresis in the direction opposite to that observed in SnO2 NW FET with SiO2 gate dielectrics.

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