Controlling Solar Photovoltaic Cells Utilizing Polymer-Dispersed Liquid Crystal Technology

2017 ◽  
Author(s):  
Hanie O. Baayoun ◽  
Zheng Chen
Keyword(s):  
Liquid Crystal ◽  
Photovoltaic Cells ◽  
Solar Panel ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Photovoltaic Panel ◽  
Polymer Dispersed Liquid Crystal ◽  
Power Regulation ◽  
Polymer Dispersed ◽  
Liquid Crystal Technology

Solar charge controllers are currently a necessary piece of equipment when utilizing the energy from a photovoltaic system for charging purposes. However, a standard solar charge controller available today includes some drawbacks that may be crucial for specific applications. An alternate method of regulating energy from a photovoltaic panel can be accomplished by utilizing polymer-dispersed liquid crystal (PDLC) technology. Combining a solar panel with a proper PDLC material allows the input into the photovoltaic panel to be controlled. This method of power regulation can lead to increased efficiency, reduced cost, reduced weight, and increased safety when compared to a standard solar charge controller.

Switchable circular-to-point converter based on holographic polymer-dispersed liquid-crystal technology

2007 ◽  
Vol 46 (2) ◽  
pp. 161 ◽  
Author(s):  
Hailiang Zhang ◽  
Haiqing Xianyu ◽  
Jianhua Liang ◽  
Yan Bétrémieux ◽  
Gregory P. Crawford ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Liquid Crystal Technology

Advances in Holographic Polymer Dispersed Liquid Crystal Technology

1999 ◽  
Vol 559 ◽  
Author(s):  
C. C. Bowley ◽  
A. K. Fontecchio ◽  
J.-J. Lin ◽  
H. Yuan ◽  
G. P. Crawford
Keyword(s):  
Liquid Crystal ◽  
Phenomenological Model ◽  
Polymer Dispersed Liquid Crystal ◽  
Unusual Effect ◽  
Recent Advances ◽  
Reflection Peak ◽  
Polymer Dispersed ◽  
Dual Domain ◽  
Reflective Display ◽  
Liquid Crystal Technology

ABSTRACTWe discuss recent advances in reflective holographically-formed polymer dispersed liquid crystal materials in the context of their suitability for reflective display applications. A dual-domain phenomenon resulting in a broadened reflection peak is presented. A simple phenomenological model is developed to explain this unusual effect The effect of monomer functionality on the reflectance characteristics of these materials is also discussed. Monomers of effective functionality ∼4.5 yield the brightest holograms, however, the data suggests that these systems are currently far from optimal.

scholarly journals Polymer Dispersed Cholesteric Liquid Crystals With a Toroidal Director Configuration under an Electric Field

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 732
Author(s):  
Anna P. Gardymova ◽  
Mikhail N. Krakhalev ◽  
Victor Ya. Zyryanov ◽  
Alexandra A. Gruzdenko ◽  
Andrey A. Alekseev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Electric Field ◽  
Point Defects ◽  
Structural Response ◽  
Optical Filters ◽  
Response Curves ◽  
Polymer Dispersed Liquid Crystal ◽  
Dichroic Dye ◽  
Polymer Dispersed

The electro-optical properties of polymer dispersed liquid crystal (PDLC) films are highly dependent on the features of the contained liquid crystal (LC) droplets. Cholesteric LC droplets with homeotropic boundaries can form several topologically different orientational structures, including ones with single and more point defects, layer-like, and axisymmetric twisted toroidal structures. These structures are very sensitive to an applied electric field. In this work, we have demonstrated experimentally and by computer simulations that twisted toroidal droplets reveal strong structural response to the electric field. In turn, this leads to vivid changes in the optical texture in crossed polarizers. The response of droplets of different sizes were found to be equivalent in terms of dimensionless parameters. In addition, the explanation of this phenomenon showed a comparison of theoretical and experimental structural response curves aids to determine the shape of the droplet. Finally, we demonstrated that the addition of a dichroic dye allows such films to be used as optical filters with adjustable color even without polarizers.

Kinetics of Droplet Formation in UV-Cured Polymer-Dispersed Liquid Crystal Films

1994 ◽  
Vol 33 (Part 1, No. 5A) ◽  
pp. 2641-2647 ◽  
Author(s):  
Vasilii G. Nazarenko ◽  
Seshu Sarala ◽  
Nelamangala V. Madhusudana
Keyword(s):  
Liquid Crystal ◽  
Droplet Formation ◽  
Liquid Crystal Films ◽  
Polymer Dispersed Liquid Crystal ◽  
Crystal Films ◽  
Polymer Dispersed ◽  
Kinetics Of

scholarly journals Holographic Polymer-Dispersed Liquid Crystals: Materials, Formation, and Applications

2008 ◽  
Vol 2008 ◽  
pp. 1-52 ◽  
Author(s):  
Y. J. Liu ◽  
X. W. Sun
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Refractive Index Profile ◽  
Single Step ◽  
Fast Switching ◽  
Polymer Dispersed Liquid Crystal ◽  
Current State ◽  
Index Matching ◽  
Polymer Dispersed ◽  
Materials Used

By combining polymer-dispersed liquid crystal (PDLC) and holography, holographic PDLC (H-PDLC) has emerged as a new composite material for switchable or tunable optical devices. Generally, H-PDLC structures are created in a liquid crystal cell filled with polymer-dispersed liquid crystal materials by recording the interference pattern generated by two or more coherent laser beams which is a fast and single-step fabrication. With a relatively ideal phase separation between liquid crystals and polymers, periodic refractive index profile is formed in the cell and thus light can be diffracted. Under a suitable electric field, the light diffraction behavior disappears due to the index matching between liquid crystals and polymers. H-PDLCs show a fast switching time due to the small size of the liquid crystal droplets. So far, H-PDLCs have been applied in many promising applications in photonics, such as flat panel displays, switchable gratings, switchable lasers, switchable microlenses, and switchable photonic crystals. In this paper, we review the current state-of-the-art of H-PDLCs including the materials used to date, the grating formation dynamics and simulations, the optimization of electro-optical properties, the photonic applications, and the issues existed in H-PDLCs.

LIQUID-CRYSTAL COMPOSITES: Multicolor Polymer-Dispersed Liquid Crystal (Adv. Mater. 7/2011)

2011 ◽  
Vol 23 (7) ◽  
pp. 883-883
Author(s):  
Naomi Kumano ◽  
Takahiro Seki ◽  
Masahiko Ishii ◽  
Hiroshi Nakamura ◽  
Tomonari Umemura ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed
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