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FARZANA AHMAD1, KIM HYE RIM1, YOUNG JAE JEON1, MUHAMMAD JAMIL2,3,*
Recently, color polymer dispersed liquid crystal (PDLC) display has been extensively investigated in the area of the switchable color window called the smart window. To use a window made of dye PDLC film, various electro-optical properties such as a high contrast ratio (CR) and a color band are essentially required. However in an alternative approach for colored smart windows production usually its CR is deteriorated. Also, color contrast is usually not achieved as much desired for the dye-PDLCs. We in this study, keeping the following problems, selected the two dyes, Sudan black B (SBB) and Rose Bengal (RB) combination and have employed them in the fabrication of PDLCs. In the present study dye-PDLCs at different dye contents and liquid crystals (LC) compositions have been investigated. From the obtained results, we observed that by doping the dye in PDLC the color band shifted to the new absorption area. The fabricated PDLC gave a good CR and color PDLC even at the small amount of both dye contents. Further, this study revealed that both Vth and Vsat also decreased for the prepared PDLC. Consequently, the following dye combinations can be possibly applied in dye PDLC industry.
Dye Material, Polymer Dispersed Liquid Crystals, Electro-Optical Properties, Contrast Ratio, Absorbance, Transmittance.
FARZANA AHMAD, KIM HYE RIM, YOUNG JAE JEON, MUHAMMAD JAMIL, Investigation of electro-optical responses of PDLC films via doping of two different dye materials, Optoelectronics and Advanced Materials - Rapid Communications, 15, 3-4, March-April 2021, pp.101-108 (2021).
Submitted at: Sept. 21, 2020
Accepted at: April 7, 2021
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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