TY - JOUR
T1 - Electro-optical and dielectric properties of polymer-stabilized blue phase liquid crystal impregnated with a fluorine-containing compound
AU - Wu, Po Chang
AU - Chen, Hsin Li
AU - Rudakova, Natalya V.
AU - Timofeev, Ivan V.
AU - Zyryanov, Victor Ya
AU - Lee, Wei
PY - 2018/10/1
Y1 - 2018/10/1
N2 - The effects of a fluorine-containing compound (4,4′-difluorobenzophenone; DF) on the electro-optical and dielectric properties of polymer-stabilized blue phase (PSBP) liquid crystals were investigated. When a PSBP cell was driven by an in-plane electric field, the addition of DF up to 2.7 wt% effectively reduced the operation voltage by ~ 30%. Further inspection by dielectric spectroscopy indicated that the ionic concentration in PSBP decreased with increasing loading of DF. This finding can be ascribed to the complexation of impurity ions near the ketone group and carbon–fluorine bonds of the DF compound that restrained the ion transport after photopolymerization. As a result, the DF compound can be regarded as a superior ion-suppressor, enabling the reduction in the ionic effect and, in turn, the promotion of the electro-optical response of a PSBP.
AB - The effects of a fluorine-containing compound (4,4′-difluorobenzophenone; DF) on the electro-optical and dielectric properties of polymer-stabilized blue phase (PSBP) liquid crystals were investigated. When a PSBP cell was driven by an in-plane electric field, the addition of DF up to 2.7 wt% effectively reduced the operation voltage by ~ 30%. Further inspection by dielectric spectroscopy indicated that the ionic concentration in PSBP decreased with increasing loading of DF. This finding can be ascribed to the complexation of impurity ions near the ketone group and carbon–fluorine bonds of the DF compound that restrained the ion transport after photopolymerization. As a result, the DF compound can be regarded as a superior ion-suppressor, enabling the reduction in the ionic effect and, in turn, the promotion of the electro-optical response of a PSBP.
KW - Fluorine-containing compound
KW - Ionic effect
KW - Liquid crystal
KW - Operating voltage
KW - Polymer-stabilized blue phase
UR - http://www.scopus.com/inward/record.url?scp=85038960564&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2017.12.062
DO - 10.1016/j.molliq.2017.12.062
M3 - Article
AN - SCOPUS:85038960564
SN - 0167-7322
VL - 267
SP - 138
EP - 143
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
ER -