Holographic‐polymer‐dispersed liquid crystals doped with poly(vinyl carbazole)–fullerene

Abstract

The effects of poly(vinyl carbazole) (PVK) doped to a poly(urethane acrylate) matrix in holographicpolymer-dispersed liquid crystals were studied. With the addition and increasing amounts of PVK, the driving voltage and rising time of the films decreased because of the increased effective local electric field across the liquid crystal (LC) droplet. Off-state diffraction efficiency was increased with the addition and increasing amounts of PVK presumably because of the increased elasticity of the polymer matrix, which augmented the phase separation of the polymer and LC by effectively squeezing the LC molecules out of the polymer matrix.

Effect of graphene doping of holographic polymer‐dispersed liquid crystals

“…Small‐sized, transparent, conducting particles, which are well dispersed in a polymer matrix, are also good candidate materials. These include indium‐tin oxide (ITO), chrome oxide, polyethylene oxide, fullerene, carbon nanotubes, and so on 10, 12–14. The quantity of particles to be added depends on the required decrease in driving voltage.…”

“…These include indium-tin oxide (ITO), chrome oxide, polyethylene oxide, fullerene, carbon nanotubes, and so on. 10,[12][13][14] The quantity of particles to be added depends on the required decrease in driving voltage. Conversely, an increase in viscosity has often been used to control the overall grating formation process.…”