Fabrication of coloured liquid crystal device using photoluminescent biomolecular chlorophyll

Chunho Kim, Intae Son, Byungsun Lee, Seung-Woo Cho, Jong Pyo Wu, Jun Hyup Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We fabricated a coloured liquid crystal (LC) device using photoluminescent biomolecular chlorophyll. The chlorophyll molecule, which is inexpensive because of its abundance in nature, was doped in the LCs for manufacturing the coloured LC device. We confirmed the green colour property of the LC doped with chlorophyll dye using UV-vis spectroscopy. Although the LC cell filled with 0.5 wt% chlorophyll showed good vertical alignment and fast response time, the doping of LC medium with 1.5 wt% chlorophyll resulted in imperfect vertical alignment and slowed response time due to the aggregation of chlorophyll molecules at high concentration. Furthermore, the photoluminescence (PL) characteristics of the LC doped with chlorophyll were investigated using PL spectroscopy. The coloured LC cell doped with chlorophyll dye showed emission in the red wave number region under UV light. As the LC doped with chlorophyll exhibited good colour performance, conventional colour filter layers could be avoided with the employment of the proposed coloured LC device. By controlling the light source, it is possible to apply the advanced LC device for colour switching. Moreover, a full-colour-switching LC device can be realised using various biomolecular dyes that can emit other colours.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalLiquid Crystals
Volume43
Issue number1
DOIs
Publication statusPublished - 2016 Jan 2

Fingerprint

Liquid Crystals
chlorophylls
Chlorophyll
Liquid crystals
liquid crystals
Fabrication
fabrication
Color
color
Coloring Agents
Dyes
dyes
alignment
photoluminescence
Molecules
Photoluminescence spectroscopy
Ultraviolet spectroscopy
cells
Ultraviolet radiation
spectroscopy

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Chunho ; Son, Intae ; Lee, Byungsun ; Cho, Seung-Woo ; Wu, Jong Pyo ; Lee, Jun Hyup. / Fabrication of coloured liquid crystal device using photoluminescent biomolecular chlorophyll. In: Liquid Crystals. 2016 ; Vol. 43, No. 1. pp. 77-82.
@article{0e6e1cde3d4540a1abb7216cd8508fcb,
title = "Fabrication of coloured liquid crystal device using photoluminescent biomolecular chlorophyll",
abstract = "We fabricated a coloured liquid crystal (LC) device using photoluminescent biomolecular chlorophyll. The chlorophyll molecule, which is inexpensive because of its abundance in nature, was doped in the LCs for manufacturing the coloured LC device. We confirmed the green colour property of the LC doped with chlorophyll dye using UV-vis spectroscopy. Although the LC cell filled with 0.5 wt{\%} chlorophyll showed good vertical alignment and fast response time, the doping of LC medium with 1.5 wt{\%} chlorophyll resulted in imperfect vertical alignment and slowed response time due to the aggregation of chlorophyll molecules at high concentration. Furthermore, the photoluminescence (PL) characteristics of the LC doped with chlorophyll were investigated using PL spectroscopy. The coloured LC cell doped with chlorophyll dye showed emission in the red wave number region under UV light. As the LC doped with chlorophyll exhibited good colour performance, conventional colour filter layers could be avoided with the employment of the proposed coloured LC device. By controlling the light source, it is possible to apply the advanced LC device for colour switching. Moreover, a full-colour-switching LC device can be realised using various biomolecular dyes that can emit other colours.",
author = "Chunho Kim and Intae Son and Byungsun Lee and Seung-Woo Cho and Wu, {Jong Pyo} and Lee, {Jun Hyup}",
year = "2016",
month = "1",
day = "2",
doi = "10.1080/02678292.2015.1055843",
language = "English",
volume = "43",
pages = "77--82",
journal = "Liquid Crystals",
issn = "0267-8292",
publisher = "Taylor and Francis Ltd.",
number = "1",

}

Fabrication of coloured liquid crystal device using photoluminescent biomolecular chlorophyll. / Kim, Chunho; Son, Intae; Lee, Byungsun; Cho, Seung-Woo; Wu, Jong Pyo; Lee, Jun Hyup.

In: Liquid Crystals, Vol. 43, No. 1, 02.01.2016, p. 77-82.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Fabrication of coloured liquid crystal device using photoluminescent biomolecular chlorophyll

AU - Kim, Chunho

AU - Son, Intae

AU - Lee, Byungsun

AU - Cho, Seung-Woo

AU - Wu, Jong Pyo

AU - Lee, Jun Hyup

PY - 2016/1/2

Y1 - 2016/1/2

N2 - We fabricated a coloured liquid crystal (LC) device using photoluminescent biomolecular chlorophyll. The chlorophyll molecule, which is inexpensive because of its abundance in nature, was doped in the LCs for manufacturing the coloured LC device. We confirmed the green colour property of the LC doped with chlorophyll dye using UV-vis spectroscopy. Although the LC cell filled with 0.5 wt% chlorophyll showed good vertical alignment and fast response time, the doping of LC medium with 1.5 wt% chlorophyll resulted in imperfect vertical alignment and slowed response time due to the aggregation of chlorophyll molecules at high concentration. Furthermore, the photoluminescence (PL) characteristics of the LC doped with chlorophyll were investigated using PL spectroscopy. The coloured LC cell doped with chlorophyll dye showed emission in the red wave number region under UV light. As the LC doped with chlorophyll exhibited good colour performance, conventional colour filter layers could be avoided with the employment of the proposed coloured LC device. By controlling the light source, it is possible to apply the advanced LC device for colour switching. Moreover, a full-colour-switching LC device can be realised using various biomolecular dyes that can emit other colours.

AB - We fabricated a coloured liquid crystal (LC) device using photoluminescent biomolecular chlorophyll. The chlorophyll molecule, which is inexpensive because of its abundance in nature, was doped in the LCs for manufacturing the coloured LC device. We confirmed the green colour property of the LC doped with chlorophyll dye using UV-vis spectroscopy. Although the LC cell filled with 0.5 wt% chlorophyll showed good vertical alignment and fast response time, the doping of LC medium with 1.5 wt% chlorophyll resulted in imperfect vertical alignment and slowed response time due to the aggregation of chlorophyll molecules at high concentration. Furthermore, the photoluminescence (PL) characteristics of the LC doped with chlorophyll were investigated using PL spectroscopy. The coloured LC cell doped with chlorophyll dye showed emission in the red wave number region under UV light. As the LC doped with chlorophyll exhibited good colour performance, conventional colour filter layers could be avoided with the employment of the proposed coloured LC device. By controlling the light source, it is possible to apply the advanced LC device for colour switching. Moreover, a full-colour-switching LC device can be realised using various biomolecular dyes that can emit other colours.

UR - http://www.scopus.com/inward/record.url?scp=84956774979&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84956774979&partnerID=8YFLogxK

U2 - 10.1080/02678292.2015.1055843

DO - 10.1080/02678292.2015.1055843

M3 - Article

VL - 43

SP - 77

EP - 82

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 1

ER -