Cited time in webofscience Cited time in scopus

Switchable Response of Ferroelectric Nanoparticle Doped Polymer-Dispersed Liquid Crystals

Switchable Response of Ferroelectric Nanoparticle Doped Polymer-Dispersed Liquid Crystals
Shim, H[Shim, Hyunseok]Lyu, HK[Lyu, Hong-Kun]Allabergenov, B[Allabergenov, Bunyod]Garbovskiy, Y[Garbovskiy, Yuriy]Glushchenko, A[Glushchenko, Anatoliy]Choi, B[Choi, Byeongdae]
DGIST Authors
Shim, H[Shim, Hyunseok]Lyu, HK[Lyu, Hong-Kun]Choi, B[Choi, Byeongdae]
Issued Date
Article Type
Barium CompoundsBlendingBTO NanoparticlesDoped PolymersDoping (Additives)Driving VoltagesElectrical PerformanceElectro-Optical PropertiesFerroelectricityLiquid Crystal-PolymersLiquid Crystal DisplaysLiquid CrystalsLiquid Crystals (LCs)LiquidsNano ParticleNanoparticlesOptical PropertiesParticle SizePhase SeparationPolymer-Dispersed Liquid Crystal (PDLC)Polymer Dispersed Liquid Crystals (PDLC)Polymerization Induced Phase SeparationsResponse-Time (Computer Systems)Response TimeSemiconductor DopingSuspensions (Fluids)
In this study, we doped polymer-dispersed liquid crystals (PDLCs) with barium titanate (BaTiO3, BTO) nanoparticles to investigate the effects of particle size on the electro-optical properties of the suspensions, such as the driving voltage and response time. We mixed BTO nanoparticles having various sizes of 8 nm, 20 nm, and 2 μm, and liquid crystals (LCs) (E7) prior to blending the LCs and pre-polymers (NOA 65). We fabricated the PDLC films using the polymerization-induced phase-separation (PIPS) method. The film surface was irradiated with UV (365 nm) light for 3 min to induce phase separation between the LC and the polymer. According to the results, the 10% transmittance voltage (V10) improved from 18.2 V to 6.8 V by the addition of 0.3 vol% of 8 nm BTO particles to the PDLC. The response time also decreased from 15.2 ms to 8.4 ms. Smaller particles were distributed more uniformly within the sample, which resulted in a reduction of the V10 and response time of the PDLCs. The results obtained imply that nanoscale ferroelectric particle doping is a powerful tool to tune electro-optical properties of liquid crystals based systems, including improving the electrical performances without compromising other important characteristics, such as the haze of the PDLC devices. Copyright © 2016 American Scientific Publishers All rights reserved.
American Scientific Publishers
Related Researcher
  • 류홍근 Lyu, Hong-Kun 전자정보시스템연구부
  • Research Interests
Files in This Item:

There are no files associated with this item.

Appears in Collections:
Intelligent Devices and Systems Research Group 1. Journal Articles


  • twitter
  • facebook
  • mendeley

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.