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Liquid Crystals Volume 40, 2013 - Issue 5
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Original Articles

Superior electro-optic properties of liquid crystal system using cobalt oxide nanoparticle dispersion

Hyung-Koo Chung Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
,
Hong-Gyu Park Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
,
Yong-Seok Ha Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
,
Jeong-Min Han Department of Electronic, Seoil University, Seoul, Republic of Korea
,
Jin-Woo Lee Technology Policy Department, Korea Electronics Technology Institute, Seongnam-si, Republic of Korea
&
Dae-Shik Seo Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of KoreaCorrespondence[email protected]
Pages 632-638 | Received 17 Dec 2012, Accepted 31 Jan 2013, Published online: 25 Feb 2013
 
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Abstract

In this article, we study the electro-optical (EO) properties of the homogeneous aligned nematic liquid crystal (N-LC) doped with cobalt oxide (Co3O4) nanoparticles (NPs). The EO characteristics of Co3O4 doped N-LC are higher performance, indicating lower threshold voltage (1.33 V), faster rising time (1.479 ms), and faster falling time (9.343 ms) than pure liquid crystal (LC) cells. We have demonstrated these results by investigating the relationship between dielectric constants and LC device properties. Furthermore, we proved NPs doped N-LC cells drive low power operation without capacitance hysteresis. Our experimental results were verified by software simulation based on general physical properties.

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