Köysal, O., Gleeson, H.F. orcid.org/0000-0002-7494-2100 and Kocakülah, G. (2024) A double-layer light shutter consisting of polymer dispersed liquid crystal and azo dye/quantum dot. Optical Materials, 154. 115645. ISSN 0925-3467
Abstract
We have developed a double-layer liquid crystal light shutter and investigated its temperature dependent morphological, electro-optical, and dielectric properties. The optical layers of the shutter are in direct contact, reducing optical losses. The shutter comprises a polymer dispersed liquid crystal film adjacent to an azo dye methyl red and CdSeS/ZnS quantum dot doped cholesteric liquid crystal layer. This novel double-layer light shutter device is switchable between opaque and transparent states at room temperature, and it exhibits low threshold and saturation voltages. Both the threshold (Vth) and saturation (Vsat) voltages are found to decrease with increasing temperature. The electrical characteristics of the shutter, namely the real part of dielectric constant (ε′) and the ac conductivity (σac) also increase with temperature in the low frequency region. Our results show that this double-layer light shutter has interesting potential for simple electro-optical devices and smart window applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies. This is an author produced version of an article published in Optical Materials. Uploaded in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. |
Keywords: | Azo dye, Cholesteric liquid crystal, Light shutter, Polymer dispersed liquid crystal, Quantum dot |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Soft Matter Physics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Jun 2024 12:25 |
Last Modified: | 14 Jun 2024 12:57 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.optmat.2024.115645 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:213181 |
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