Electro-optical characteristics of polymer-dispersed liquid crystal containing copper (II) phthalocyanine as a function of UV irradiation time

被引：18
作者：
Choi, Se-Hoon [1 ]
Kim, Jin-Ah [1 ]
Heo, Gi Seok [3 ]
Park, Hong-Gyu [1 ,2 ]
机构：
[1] Changwon Natl Univ, Dept Smart Mfg Engn, 20-1 ChangwonDaehak Ro, Chang Won, South Korea
[2] Changwon Natl Univ, Dept Elect Elect Control Engn, 20-1 Changwondaehak Ro, Changwon Si, South Korea
[3] Korea Inst Ind Technol, Natl Ctr Nanoproc & Equipment, 6 Cheomdangwagi Ro 208beon Gil, Gwangju 500480, South Korea
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2022年 / 363卷
基金：
新加坡国家研究基金会;
关键词：
Smart window; Polymer -dispersed liquid crystal; Electro-optical properties; Copper(ii) phthalocyanine; AMBIENT LIGHT; TEMPERATURE; PERFORMANCE; MODULATION;
D O I：
10.1016/j.molliq.2022.119821
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We describe a method of dispersing copper (II) phthalocyanine that can expand the application range of polymer-dispersed liquid crystals (PDLCs) among smart-window technologies. Property changes were monitored during the polymerization-induced phase separation method as the ultraviolet (UV) irradia-tion time was increased from 70 to 175 s. With increasing UV irradiation time, the number of droplets in the polymer matrix within the PDLC increased, while the droplet size decreased, as observed by polar-ized optical and low vacuum-scanning electron microscopies. Voltage-transmittance and response time were measured to observe the effects on electro-optical properties; the threshold and saturation voltages increased with increasing UV-irradiation time. The falling time of the response decreased with increasing irradiation time; a fast switching time of < 20 ms was observed in all cases. This study provides the per-formance of the produced PDLC varies according to the UV irradiation time, and conditions and processes necessary for producing blue PDLC are presented.(c) 2022 Elsevier B.V. All rights reserved.
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页数：7
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