Electro-optical characteristics of photo-aligned vertical-alignment cells on photo-crosslinkable copolymer surfaces containing the cholesteryl moiety

Jeoung Yeon Hwang, Dae-Shik Seo, Eun Joo Hahn

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The electro-optical (EO) performances of a photoaligned vertical-alignment liquid crystal display (VA-LCD) on a copoly(4-methacryloyloxychalcone-cholesteryl methacrylate) surface for homeotropic LC alignment were studied. Good thermal stability of the synthesized photo-crosslinkable copolymer was seen during thermogravimetric analysis. A good voltage-transmittance curve and fast response time achieved in the photoaligned VA-LCD with obliquely polarized UV exposure at 30° from the vertical on the photo-crosslinkable copolymer surfaces. The EO characteristics of the photoaligned VA-LCD decreased after long time UV exposure because of dissociation of the ester linkage in the chalcone structure of the photo-crosslinkable polymer.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalLiquid Crystals
Volume29
Issue number4
DOIs
Publication statusPublished - 2002 Apr 10

Fingerprint

copolymers
Copolymers
Liquid crystal displays
alignment
liquid crystals
cells
Chalcone
Methacrylates
linkages
Thermogravimetric analysis
esters
transmittance
Esters
Polymers
Thermodynamic stability
thermal stability
dissociation
polymers
Electric potential
electric potential

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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title = "Electro-optical characteristics of photo-aligned vertical-alignment cells on photo-crosslinkable copolymer surfaces containing the cholesteryl moiety",
abstract = "The electro-optical (EO) performances of a photoaligned vertical-alignment liquid crystal display (VA-LCD) on a copoly(4-methacryloyloxychalcone-cholesteryl methacrylate) surface for homeotropic LC alignment were studied. Good thermal stability of the synthesized photo-crosslinkable copolymer was seen during thermogravimetric analysis. A good voltage-transmittance curve and fast response time achieved in the photoaligned VA-LCD with obliquely polarized UV exposure at 30° from the vertical on the photo-crosslinkable copolymer surfaces. The EO characteristics of the photoaligned VA-LCD decreased after long time UV exposure because of dissociation of the ester linkage in the chalcone structure of the photo-crosslinkable polymer.",
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Electro-optical characteristics of photo-aligned vertical-alignment cells on photo-crosslinkable copolymer surfaces containing the cholesteryl moiety. / Hwang, Jeoung Yeon; Seo, Dae-Shik; Hahn, Eun Joo.

In: Liquid Crystals, Vol. 29, No. 4, 10.04.2002, p. 567-572.

Research output: Contribution to journalArticle

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