Enhanced electrooptical characteristics of twisted nematic liquid crystal display with ZrO 2 thin films

Lee Gon Kim, Hong Gyu Park, Young Hwan Kim, Dae-Shik Seo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A rubbing-free liquid crystal (LC) alignment method is highly desirable for future generations of large high-resolution LC-display technology. In this paper, ion-beam (IB) bombardment was carried out as an LC alignment method in order to modify the ZrO 2 surface, and unidirectional LCs were achieved. The pretilt angle was found to be a function of the IB incident energy, and a possible mechanism of the LC alignment was investigated with X-ray photoelectron spectroscopy (XPS). XPS analysis showed that the LC alignment on the IB-irradiated ZrO 2 surface was primarily due to the reformation of O-Zr bonds. The response time of a twisted nematic cell with IB-irradiated ZrO 2 thin films was superior to those with rubbed polyimide films.

Original languageEnglish
Article number6215014
Pages (from-to)1153-1155
Number of pages3
JournalIEEE Electron Device Letters
Volume33
Issue number8
DOIs
Publication statusPublished - 2012 Jun 19

Fingerprint

Liquid Crystals
Nematic liquid crystals
Liquid crystal displays
Liquid crystals
Ion beams
Thin films
X ray photoelectron spectroscopy
Polyimides

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

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abstract = "A rubbing-free liquid crystal (LC) alignment method is highly desirable for future generations of large high-resolution LC-display technology. In this paper, ion-beam (IB) bombardment was carried out as an LC alignment method in order to modify the ZrO 2 surface, and unidirectional LCs were achieved. The pretilt angle was found to be a function of the IB incident energy, and a possible mechanism of the LC alignment was investigated with X-ray photoelectron spectroscopy (XPS). XPS analysis showed that the LC alignment on the IB-irradiated ZrO 2 surface was primarily due to the reformation of O-Zr bonds. The response time of a twisted nematic cell with IB-irradiated ZrO 2 thin films was superior to those with rubbed polyimide films.",
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Enhanced electrooptical characteristics of twisted nematic liquid crystal display with ZrO 2 thin films. / Kim, Lee Gon; Park, Hong Gyu; Kim, Young Hwan; Seo, Dae-Shik.

In: IEEE Electron Device Letters, Vol. 33, No. 8, 6215014, 19.06.2012, p. 1153-1155.

Research output: Contribution to journalArticle

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