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Crystals 2019, 9(4), 181; https://doi.org/10.3390/cryst9040181

Decreasing the Residual DC Voltage by Neutralizing the Charged Mobile Ions in Liquid Crystals

1
College of Information Science and Technology, Donghua Uiversity, 2999 North Renmin Road, Songjiang District, Shanghai 201620, China
2
Engineering Research Center of Digitized Textile & Fashion Technology, Ministry of Education, Donghua University, 2999 North Renmin Road, Songjiang District, Shanghai 201620, China
3
Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea
*
Authors to whom correspondence should be addressed.
Received: 14 March 2019 / Revised: 23 March 2019 / Accepted: 25 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Ionic Liquid Crystals)
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Abstract

The decrease of the residual direct current (DC) voltage (Vrdc) of the anti-parallel liquid crystal (LC) cell using silver (Ag)-doped Polyimide (Ag-d-PI) alignment layers is presented in this manuscript. A series of Ag/PI composite thin layers are prepared by spurting or doping PI thin layers with Ag nano-particles, and Ag/PI composite thin layers are highly transparent and resistive. LC are homogeneously aligned between 2.0 mg/mL Ag-d-PI alignment layers, and the Vrdc of the cell that assembled with Ag-d-PI alignment layers decreases about 82%. The decrease of Vrdc is attributed to the trapping and neutralizing of mobile ions by Ag nano-particles. Regardless of the effect of Ag nano-particles on the conductivity of Ag-d-PI alignment layers, the voltage holding ratio (VHR) of the cells is maintained surprisingly. The experiment results reveal a simple design for a low Vrdc LC cell. View Full-Text
Keywords: liquid crystal; alignment layer; residual DC; Ag nano-particles doping liquid crystal; alignment layer; residual DC; Ag nano-particles doping
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Liu, Y.; Sang, J.; Liu, H.; Xu, H.; Zhao, S.; Sun, J.; Lee, J.H.; Jeong, H.-C.; Seo, D.-S. Decreasing the Residual DC Voltage by Neutralizing the Charged Mobile Ions in Liquid Crystals. Crystals 2019, 9, 181.

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