Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal

Hyun Jae Na, Jin Woo Lee, Won Kyu Lee, Ji Hun Lim, Hong Gyu Park, Byoung Yong Kim, Jeong Yeon Hwang, Jeong Min Han, Dae Shik Seo

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Abstract

We introduce the characteristics of the titanium dioxide (TiO2) inorganic film deposited by rf magnetron sputtering for liquid crystal display applications. The TiO2 films demonstrated vertical alignment (VA) of the liquid crystals (LCs) obtained by using ion-beam (IB) bombardment. As observed by using x-ray photo- electron spectroscopy, the chemical structure of the TiO2 was changed by IB bombardment, altering the Ti-O bonding of the Ti 2p spectra to lower intensity levels. Breaking Ti-O bonding by IB bombardment created pretilt angles between the TiO2 film and LC molecules. The better voltage-transmittance characteristics of the VA LCDs based on TiO2 film were measured and compared with the same characteristics of polyimide film.

Original languageEnglish
Pages (from-to)1151-1153
Number of pages3
JournalOptics Letters
Volume35
Issue number8
DOIs
Publication statusPublished - 2010 Apr 15

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Na, H. J., Lee, J. W., Lee, W. K., Lim, J. H., Park, H. G., Kim, B. Y., Hwang, J. Y., Han, J. M., & Seo, D. S. (2010). Titanium dioxide surface modification via ion-beam bombardment for vertical alignment of nematic liquid crystal. Optics Letters, 35(8), 1151-1153. https://doi.org/10.1364/OL.35.001151