Effect of the ion-beam bombardment and annealing temperature on sol-gel derived yttrium aluminum oxide film as liquid crystal alignment layer

Hae Chang Jeong, Gi Seok Heo, Eun Mi Kim, Ju Hwan Lee, Jeong Min Han, Dae-Shik Seo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We demonstrated a homogeneous liquid-crystal (LC) alignment state on yttrium aluminum oxide (YAlO) films, where the alignment was induced by ion-beam (IB) irradiation. Topographical analysis was performed by atomic force microscopy as a function of annealing temperature. Higher annealing temperatures yielded a smoother surface, accompanied by reduced light scattering. Transparency in the visible region increased on the surface fabricated at higher annealing temperatures. LC alignment mechanism was determined by X-ray diffraction (XRD) analysis. Moreover, IB-irradiated YAlO films annealed at temperatures greater than 200 °C exhibited good thermal stability and low capacitance–voltage hysteresis. The IB-irradiated YAlO films are suitable as alternative alignment layers in advanced LC display applications.

Original languageEnglish
Pages (from-to)569-573
Number of pages5
JournalOptical Materials
Volume64
DOIs
Publication statusPublished - 2017 Feb 1

Fingerprint

Yttrium
yttrium oxides
Liquid Crystals
Aluminum Oxide
Liquid crystals
Ion beams
Oxide films
Sol-gels
oxide films
bombardment
aluminum oxides
ion beams
liquid crystals
alignment
gels
Annealing
Aluminum
annealing
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

Cite this

Jeong, Hae Chang ; Heo, Gi Seok ; Kim, Eun Mi ; Lee, Ju Hwan ; Han, Jeong Min ; Seo, Dae-Shik. / Effect of the ion-beam bombardment and annealing temperature on sol-gel derived yttrium aluminum oxide film as liquid crystal alignment layer. In: Optical Materials. 2017 ; Vol. 64. pp. 569-573.
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Effect of the ion-beam bombardment and annealing temperature on sol-gel derived yttrium aluminum oxide film as liquid crystal alignment layer. / Jeong, Hae Chang; Heo, Gi Seok; Kim, Eun Mi; Lee, Ju Hwan; Han, Jeong Min; Seo, Dae-Shik.

In: Optical Materials, Vol. 64, 01.02.2017, p. 569-573.

Research output: Contribution to journalArticle

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T1 - Effect of the ion-beam bombardment and annealing temperature on sol-gel derived yttrium aluminum oxide film as liquid crystal alignment layer

AU - Jeong, Hae Chang

AU - Heo, Gi Seok

AU - Kim, Eun Mi

AU - Lee, Ju Hwan

AU - Han, Jeong Min

AU - Seo, Dae-Shik

PY - 2017/2/1

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AB - We demonstrated a homogeneous liquid-crystal (LC) alignment state on yttrium aluminum oxide (YAlO) films, where the alignment was induced by ion-beam (IB) irradiation. Topographical analysis was performed by atomic force microscopy as a function of annealing temperature. Higher annealing temperatures yielded a smoother surface, accompanied by reduced light scattering. Transparency in the visible region increased on the surface fabricated at higher annealing temperatures. LC alignment mechanism was determined by X-ray diffraction (XRD) analysis. Moreover, IB-irradiated YAlO films annealed at temperatures greater than 200 °C exhibited good thermal stability and low capacitance–voltage hysteresis. The IB-irradiated YAlO films are suitable as alternative alignment layers in advanced LC display applications.

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