Vertically aligned liquid crystals on a γ -Al2O 3 alignment film using ion-beam irradiation

Hong Gyu Park, Young Hwan Kim, Byeong Yun Oh, Won Kyu Lee, Byoung Yong Kim, Dae Shik Seo, Jeong Yeon Hwang

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Abstract

Using ion-beam (IB) irradiation, liquid crystals (LCs) were vertically aligned (VA) on a γ -Al2O3 alignment film. Atomic-layer deposition was used to orient the LCs on high-quality γ -Al2O3 alignment films. The LC molecule orientation indicates the vertical direction of the atomic-layer-deposited γ -Al 2O3 alignment films. X-ray photoelectron spectroscopy showed that IB irradiation changed the chemical structure, shifting the Al-O binding energy and altering the Al-O bonding intensity. The low-voltage transmittance characteristics of the VA LC displays on the γ -Al 2O3 alignment films were also measured, showing reduced voltage and power requirements.

Original languageEnglish
Article number233507
JournalApplied Physics Letters
Volume93
Issue number23
DOIs
Publication statusPublished - 2008 Dec 19

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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