Preparation of VxW1−xO2(M)@SiO2 ultrathin nanostructures with high optical performance and optimization for smart windows by etching

2013 ◽  
Vol 1 (40) ◽  
pp. 12545 ◽  
Author(s):  
Aibin Huang ◽  
Yijie Zhou ◽  
Yamei Li ◽  
Shidong Ji ◽  
Hongjie Luo ◽  
...  
Keyword(s):  
Optical Performance ◽  
Smart Windows

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.

scholarly journals Bio-inspired TiO2 nano-cone antireflection layer for the optical performance improvement of VO2 thermochromic smart windows

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sai Liu ◽  
Chi Yan Tso ◽  
Hau Him Lee ◽  
Yi Zhang ◽  
Kin Man Yu ◽  
...  
Keyword(s):  
Performance Improvement ◽  
Optical Performance ◽  
Smart Windows

Ball-Milling Assisted Pyrolysis Fabrication of VO 2(M) Nanoparticles with Exemplary Optical Performance for Smart Windows

2021 ◽  
Author(s):  
Chiyuan Wang ◽  
Huiyan Xu ◽  
Shang Wang ◽  
Xiaodan Guo ◽  
Xin Ma ◽  
...  
Keyword(s):  
Ball Milling ◽  
Optical Performance ◽  
Smart Windows

Enhanced optical performance of thermochromic VO2 based on multilayer designs

2019 ◽  
Vol 88 (3) ◽  
pp. 30301
Author(s):  
Houao Liu ◽  
Hao Song ◽  
Hao Xie ◽  
Guanchao Yin
Keyword(s):  
Solar Spectrum ◽  
Multilayer Structures ◽  
Optical Performance ◽  
Smart Windows ◽  
Optical Responses ◽  
Relative Enhancement ◽  
Thermochromic Material ◽  
Glass Interface ◽  
Base Structure

VO2 is a widely studied thermochromic material for smart windows. In this work, we comprehensively studied optical responses of VO2-based multilayer structures. It is discovered that one-layer antireflection layer is capable of effectively enhancing both luminous transmittance (Tlum) and solar transmittance (Tsol), solar spectrum modulation (ΔTsol) is however quite moderate. Employing a two-top-layer strategy further improves the optical performance of VO2, especially with an increase of ΔTsol from 0.068 to 0.082. Remarkably, combining a layer with an index of 2.2 at the VO2/glass interface continues to enhance the optical performance, leading to the highest Tlum and ΔTsol among the investigated multilayer structures. Compared to the base structure of VO2/glass, it contributes to a relative enhancement of 26.4% (from 0.435 to 0.550) for Tlum (<τc), 35.3% (from 0.362 to 0.490) for Tlum (>τc), and 71.7% (from 0.060 to 0.103) for ΔTsol.

Yttrium Oxyhydrides for Photochromic Applications: Correlating Composition and Optical Response

2018 ◽  
Author(s):  
Dmitrii Moldarev ◽  
Elbruz M. Baba ◽  
Marcos V. Moro ◽  
Chang C. You ◽  
Smagul Zh. Karazhanov ◽  
...  
Keyword(s):  
Medical Devices ◽  
Ternary Diagram ◽  
Optical And Electrical Properties ◽  
Ambient Conditions ◽  
Elastic Recoil ◽  
Elastic Recoil Detection Analysis ◽  
Photochromic Properties ◽  
Smart Windows ◽  
Elastic Recoil Detection ◽  
Detection Analysis

It has been recently demonstrated that yttrium oxyhydride(YHO) films can exhibit reversible photochromic properties when exposed to illumination at ambient conditions. This switchable optical propertyenables their utilization in many technological applications, such as smart windows, sensors, goggles, medical devices, etc. However, how the composition of the films affects their optical properties is not fully clear and therefore demands a straightforward investigation. In this work, the composition of YHO films manufactured by reactive magnetron sputtering under different conditions is deduced in a ternary diagram from Time-of-Flight Elastic Recoil Detection Analysis (ToF-ERDA). The results suggest that stable compounds are formed with a specificchemical formula – YH<sub>2-δ</sub>O<sub>δ</sub>. In addition, optical and electrical properties of the films are investigated, and a correlation with their compositions is established. The corresponding photochromic response is found in a specific oxygen concentration range (0.45 < δ < 1.5) with maximum and minimum of magnitude on the lower and higher border, respectively.

Electro-Optical Performance of OLED with MEH-PPV Fabricated by Solution Process

2019 ◽  
pp. 727
Author(s):  
Seok Je Lee ◽  
Fangnan Yao ◽  
Seung Il Lee ◽  
Cao Jin ◽  
Woo Young Kim ◽  
...  
Keyword(s):  
Solution Process ◽  
Optical Performance
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