Simultaneous achievement of high visible transmission and near-infrared heat shielding in flexible liquid crystal-based smart windows via electrode design

Solar Energy ◽  
2019 ◽  
Vol 188 ◽  
pp. 857-864 ◽  
Author(s):  
Jinhua Huang ◽  
Jia Li ◽  
Junjun Xu ◽  
Zhaozhao Wang ◽  
Wei Sheng ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Near Infrared ◽  
Electrode Design ◽  
Smart Windows ◽  
Heat Shielding

Heat-Shielding and Self-Cleaning Smart Windows: Near-Infrared Reflective Photonic Crystals with Self-Healing Omniphobicity via Layer-by-Layer Self-Assembly

2018 ◽  
Vol 10 (26) ◽  
pp. 22731-22738 ◽  
Author(s):  
Chiaki Nakamura ◽  
Kengo Manabe ◽  
Mizuki Tenjimbayashi ◽  
Yuki Tokura ◽  
Kyu-Hong Kyung ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Near Infrared ◽  
Layer By Layer ◽  
Self Healing ◽  
Smart Windows ◽  
Self Cleaning ◽  
Heat Shielding

scholarly journals Observing and controlling a Tamm plasmon at the interface with a metasurface

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 897-903 ◽  
Author(s):  
Oleksandr Buchnev ◽  
Alexandr Belosludtsev ◽  
Victor Reshetnyak ◽  
Dean R. Evans ◽  
Vassili A. Fedotov
Keyword(s):  
Liquid Crystal ◽  
Metal Film ◽  
Near Infrared ◽  
Thin Metal Film ◽  
Outer Side ◽  
Spectral Position ◽  
External Perturbations ◽  
Dielectric Mirror ◽  
Wavelength Scale ◽  
Sub Wavelength

AbstractWe demonstrate experimentally that Tamm plasmons in the near infrared can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. More crucially, not only do Tamm plasmons survive the nanopatterning of the metal film but they also become sensitive to external perturbations as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface, we were able to red shift the spectral position of Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10-nm range.

scholarly journals High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 440
Author(s):  
Yuan Deng ◽  
Shi-Qin Li ◽  
Qian Yang ◽  
Zhi-Wang Luo ◽  
He-Lou Xie
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
High Efficiency ◽  
Polymer Brush ◽  
Light Transmittance ◽  
Smart Window ◽  
Vertical Orientation ◽  
Smart Windows ◽  
Conversion Materials

Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.

Self-Regulation of Infrared Using a Liquid Crystal Mixture Doped with Push–Pull Azobenzene for Energy-Saving Smart Windows

2021 ◽  
Vol 13 (4) ◽  
pp. 5028-5033
Author(s):  
Seung-Won Oh ◽  
Seung-Min Nam ◽  
Sang-Hyeok Kim ◽  
Tae-Hoon Yoon ◽  
Wook Sung Kim
Keyword(s):  
Liquid Crystal ◽  
Energy Saving ◽  
Self Regulation ◽  
Smart Windows ◽  
Crystal Mixture

Self-aligned Liquid Crystal Smart Windows with Dual Modes

2021 ◽  
pp. 118014
Author(s):  
Hyun-Jin Yoon ◽  
Doyeon Lee ◽  
Jiseon Yang ◽  
Jang-Kun Song
Keyword(s):  
Liquid Crystal ◽  
Smart Windows

scholarly journals Real-Time Multi-Functional Near-Infrared Wave Manipulation with a 3-bit Liquid Crystal based Coding Metasurface

2021 ◽  
Author(s):  
Javad Shabanpour ◽  
Morteza Sedaghat ◽  
Vahid Nayyeri ◽  
Homayoon Oraizi ◽  
Omar Ramahi
Keyword(s):  
Liquid Crystal ◽  
Real Time ◽  
Near Infrared ◽  
Infrared Wave

Silicon nanostructure-doped polymer/nematic liquid crystal composites for low voltage-driven smart windows

2021 ◽  
Author(s):  
Zemin He ◽  
Ping Yu ◽  
Huimin Zhang ◽  
Yuzhen Zhao ◽  
Yanfang Zhu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polymer Matrix ◽  
Performance Test ◽  
Low Voltage ◽  
Sio2 Nanoparticles ◽  
Silicon Nanostructures ◽  
Driving Voltage ◽  
Optical Performance ◽  
Smart Windows

Abstract In this work, two silicon nanostructures were doped into polymer/nematic liquid crystal composites to regulate the electric-optical performance. Commercial SiO2 nanoparticles and synthesized thiol polyhedral oligomeric silsesquioxane (POSS-SH) were chosen as the dopants to afford the silicon nanostructures. SiO2 nanoparticles were physically dispersed in the composites and the nanostructure from POSS-SH was implanted into the polymer matrix of the composites via photoinduced thiol-ene crosslinking. SEM results indicated that the implantation of POSS microstructure into the polymer matrix was conducive to obtaining the uniform porous polymer microstructures in the composites while the introduction of SiO2 nanoparticles led to the loose and heterogeneous polymer morphologies. The electric-optical performance test results also demonstrated that the electric-optical performance regulation effect of POSS microstructure was more obvious than that of SiO2 nanoparticles. The driving voltage was reduced by almost 80% if the concentration of POSS-SH in the composite was nearly 8 wt% and the sample could be completely driven by the electric field whose voltage was lower than the safe voltage for continuous contact (24 V). This work could provide a creative approach for the regulation of electric-optical performance for polymer/nematic liquid crystal composites and the fabrication of low voltage-driven PDLC films for smart windows.

Research Progress on Near-Infrared High-Power Laser Damage of Liquid Crystal Optical Devices

2020 ◽  
Vol 47 (1) ◽  
pp. 0100002
Author(s):  
刘晓凤 Liu Xiaofeng ◽  
彭丽萍 Peng Liping ◽  
赵元安 Zhao Yuanan ◽  
王玺 Wang Xi ◽  
李大伟 Li Dawei ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Power ◽  
Near Infrared ◽  
Optical Devices ◽  
Research Progress ◽  
Laser Damage ◽  
High Power Laser ◽  
Power Laser

scholarly journals Atomic Layer-Deposited Al-Doped ZnO Thin Films for Display Applications

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 539 ◽  
Author(s):  
Dimitre Dimitrov ◽  
Che-Liang Tsai ◽  
Stefan Petrov ◽  
Vera Marinova ◽  
Dimitrina Petrova ◽  
...  
Keyword(s):  
Thin Films ◽  
Liquid Crystal ◽  
Indium Tin Oxide ◽  
Near Infrared ◽  
Atomic Layer ◽  
Optical Transmittance ◽  
Flexible Polymer ◽  
Polymer Dispersed ◽  
Infrared Spectral ◽  
Aluminum Doped Zinc Oxide

The integration of high uniformity, conformal and compact transparent conductive layers into next generation indium tin oxide (ITO)-free optoelectronics, including wearable and bendable structures, is a huge challenge. In this study, we demonstrate the transparent and conductive functionality of aluminum-doped zinc oxide (AZO) thin films deposited on glass as well as on polyethylene terephthalate (PET) flexible substrates by using an atomic layer deposition (ALD) technique. AZO thin films possess high optical transmittance at visible and near-infrared spectral range and electrical properties competitive to commercial ITO layers. AZO layers deposited on flexible PET substrates demonstrate stable sheet resistance over 1000 bending cycles. Based on the performed optical and electrical characterizations, several applications of ALD AZO as transparent conductive layers are shown—AZO/glass-supported liquid crystal (LC) display and AZO/PET-based flexible polymer-dispersed liquid crystal (PDLC) devices.

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