Nanostructured metallo-supramolecular polymer-based gel-type electrochromic devices with ultrafast switching time and high colouration efficiency

2019 ◽  
Vol 7 (10) ◽  
pp. 2871-2879 ◽  
Author(s):  
Susmita Roy ◽  
Chanchal Chakraborty
Keyword(s):  
Switching Time ◽  
Supramolecular Polymer ◽  
Electrochromic Devices ◽  
Switching Times ◽  
Polymer Nanostructures ◽  
Ultrafast Switching ◽  
Electrochromic Polymer

Herein, we fabricated the ordered polymer nanostructures by compositing the electrochromic polymer polyFe to significantly improve the colouration efficiency and switching times.

scholarly journals Patterned waveguide liquid crystal displays

RSC Advances ◽  
2020 ◽  
Vol 10 (68) ◽  
pp. 41693-41702
Author(s):  
Yunho Shin ◽  
Jinghua Jiang ◽  
Guangkui Qin ◽  
Qian Wang ◽  
Ziyuan Zhou ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Switching Time ◽  
Contrast Ratio ◽  
Liquid Crystal Displays ◽  
High Contrast ◽  
High Brightness ◽  
Photo Polymerization ◽  
Ultrafast Switching ◽  
Light Waveguide ◽  
Polymer Stabilized

A polymer stabilized LC based light waveguide display is reported. Performance is improved by patterned photo-polymerization or electrode. It has high brightness, ultrafast switching time, high contrast ratio, and high transmittance for transparent and augmented displays.

scholarly journals Electrochromic Polymer Ink Derived from a Sidechain‐Modified EDOT for Electrochromic Devices with Colorless Bright State

2021 ◽  
Vol 8 (4) ◽  
pp. 726-734
Author(s):  
Sven Macher ◽  
Mauro Sassi ◽  
Luca Beverina ◽  
Uwe Posset ◽  
Marco Schott ◽  
...  
Keyword(s):  
Electrochromic Devices ◽  
Electrochromic Polymer

scholarly journals Thermally stable electrochromic devices using Fe(II)-based metallo-supramolecular polymer

2019 ◽  
Vol 200 ◽  
pp. 110000 ◽  
Author(s):  
Sanjoy Mondal ◽  
Takefumi Yoshida ◽  
Utpal Rana ◽  
Manas Kumar Bera ◽  
Masayoshi Higuchi
Keyword(s):  
Supramolecular Polymer ◽  
Thermally Stable ◽  
Electrochromic Devices

Fabrication of MoS2/WO3 nanocomposite films for enhanced electro-chromic performance

2017 ◽  
Vol 41 (24) ◽  
pp. 15327-15333 ◽  
Author(s):  
Md. Rakibuddin ◽  
Haekyoung Kim
Keyword(s):  
Nanocomposite Films ◽  
Electrochromic Devices ◽  
Switching Times

A novel MoS2 nanocomposite for electrochromic devices was synthesized, showing enhanced transmittance variation, colouration efficiency and switching times.

Vehicle Trajectory Specification in Presence of Traffic Lights with Known or Uncertain Switching Times

2020 ◽  
Vol 2674 (8) ◽  
pp. 53-66
Author(s):  
Panagiotis Typaldos ◽  
Ioanna Kalogianni ◽  
Kyriakos Simon Mountakis ◽  
Ioannis Papamichail ◽  
Markos Papageorgiou
Keyword(s):  
Optimal Control ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Real Time ◽  
Switching Time ◽  
Minimum Principle ◽  
Stochastic Dynamic ◽  
Traffic Lights ◽  
Switching Times ◽  
Optimal Approach

The main purpose of this work is to generate optimal trajectories for vehicles crossing a signalized junction, with traffic signals operated in either fixed-time or real-time (adaptive) mode. In the latter case, the next switching time is decided in real time based on the prevailing traffic conditions and is therefore uncertain in advance. The GLOSA (Green Light Optimal Speed Advisory) problem is addressed by using traffic lights information and calculating a trajectory and velocity profile for the vehicle based on the vehicle’s initial state (position and speed) and a fixed final destination state. At first, an appropriate optimal control problem is formulated and solved analytically via Pontryagin’s minimum principle (PMP) for the case of known switching times. Subsequently, for the case of real-time signals, availability of a time-window of possible signal switching times, along with the corresponding probability distribution, is assumed, and the problem is cast in the format of a stochastic optimal control problem and is solved numerically using stochastic dynamic programming (SDP) techniques. Application results, for various driving scenarios, of the deterministic approach, which considers the case of known switching times, and a comprehensive comparison of the stochastic GLOSA approach with a sub-optimal approach are presented. In particular, it is demonstrated that the proposed SDP approach achieves better average performance compared with the sub-optimal approach because of the better (probabilistic) information on the traffic light switching time.

scholarly journals Electrosynthesis of Electrochromic Polymer Membranes Based on 3,6-Di(2-thienyl)carbazole and Thiophene Derivatives

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 125
Author(s):  
Chung-Wen Kuo ◽  
Jui-Cheng Chang ◽  
Jeng-Kuei Chang ◽  
Sheng-Wei Huang ◽  
Pei-Ying Lee ◽  
...  
Keyword(s):  
Optical Memory ◽  
Polymeric Membranes ◽  
Electrochromic Device ◽  
Electrochromic Devices ◽  
Colored State ◽  
Thiophene Derivatives ◽  
Transmittance Change ◽  
Rapid Switching ◽  
Electrochromic Polymer ◽  
Transparent Conductive Electrodes

Five carbazole-containing polymeric membranes (PDTC, P(DTC-co-BTP), P(DTC-co-BTP2), P(DTC-co-TF), and P(DTC-co-TF2)) were electrodeposited on transparent conductive electrodes. P(DTC-co-BTP2) shows a high ΔT (68.4%) at 855 nm. The multichromic properties of P(DTC-co-TF2) membrane range between dark yellow, yellowish-green, gunmetal gray, and dark gray in various reduced and oxidized states. Polymer-based organic electrochromic devices are assembled using 2,2′-bithiophene- and 2-(2-thienyl)furan-based copolymers as anodic membranes, and poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid) (PEDOT-PSS) as the cathodic membrane. P(DTC-co-TF)/PEDOT-PSS electrochromic device (ECD) displays a high transmittance change (ΔT%) (43.4%) at 627 nm as well as a rapid switching time (less than 0.6 s) from a colored to a bleached state. Moreover, P(DTC-co-TF2)/PEDOT-PSS ECD shows satisfactory optical memory (the transmittance change is less than 2.9% in the colored state) and high coloration efficiency (512.6 cm2 C−1) at 627 nm.

scholarly journals Ultrafast Switching Time and Third Order Nonlinear Coefficients of Microwave Treated Single Walled Carbon Nanotube Suspensions

2009 ◽  
Vol 9 (9) ◽  
pp. 5550-5554 ◽  
Author(s):  
N. Kamaraju ◽  
Sunil Kumar ◽  
B. Karthikeyan ◽  
Bhalchandra Kakade ◽  
VijayamohananK. Pillai ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Switching Time ◽  
Third Order ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Ultrafast Switching
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