Topic
Electrochromism
About: Electrochromism is a research topic. Over the lifetime, 13097 publications have been published within this topic receiving 294637 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the synthesis and electrochemical polymerization of 3,3-diethyl-3,4-dihydro-2H-thieno-[3, 4-b][1, 4]dioxepine (ProDOT-Et 2 ) was performed resulting in a stable electrochromic polymer capable of switching between an absorbing blue neutral state and a highly transmissive sky-blue oxidized state in sub-second time frames.
Abstract: The synthesis and electrochemical polymerization of 3,3-diethyl-3,4-dihydro-2H-thieno-[3,4-b][1,4]dioxepine (ProDOT-Et 2 ) was performed resulting in a stable electrochromic polymer capable of switching between an absorbing blue neutral state and a highly transmissive sky-blue oxidized state in sub-second time frames. High optical switching contrast ratios (up to 75% at λ max ) and high composite coloration efficiencies (505 cm 2 /C) were measured.
121 citations
TL;DR: In this paper, the suitability of electrodeposited nanoparticulate-WO3 electrodes for transmissive electrochromic devices (ECDs) was highlighted, which resulted in highest photopic transmittance modulation (88.51%), better Li-ion diffusion coefficient (∼3.16 × 10−9 cm2 s−1), and excellent coloration efficiency.
Abstract: This report highlights the suitability of electrodeposited nanoparticulate-WO3 (NP-WO3) electrodes for transmissive electrochromic devices (ECDs). The WO3 electrodes in the form of thin films are composed of 10–20 nm nanoparticles. An electrochromic (EC) device of dimensions 5 × 4 cm2 fabricated using NP-WO3 showed an Li insertion coefficient (x) of 0.43, which resulted in highest photopic transmittance modulation (88.51%), better Li-ion diffusion coefficient (∼3.16 × 10−9 cm2 s−1), fast electrochromic response time (5.2 s for coloration and 3.7 for bleaching) and excellent coloration efficiency (∼137 cm2 C−1). On reduction of WO3, the CIELAB 1931 2° color space coordinates show the transition from colorless to the deep blue state (Y = 97, a* = −1.93, b* = 0.46 and Y = 10, a* = 1.57, b* = −41.01) with steady decrease in relative luminance.
121 citations
TL;DR: In this article, a voltammetric response was recorded for the reduction of the nanocrystals with quantitative injection of electrons in the 1Se state, and injection in 1Pe manifold was also achieved as evidenced by spectroscopic measurements.
Abstract: CdSe nanocrystal thin films exhibit stable and quantitative electrochemical responses when treated with cross-linking molecules such as dithiols or diamines. For the first time, a voltammetric response is recorded for the reduction of the nanocrystals with quantitative injection of electrons in the 1Se state. Injection in the 1Pe manifold is also achieved as evidenced by spectroscopic measurements. For a 100 nm thick film of 6.2 nm diameter nanocrystals, electrochromic changes are on 100 ms time scales, and remain robust after 10 000 cycles.
121 citations
TL;DR: Electrochromism in Nickel Oxide Films Containing Mg, Al, Si, V, Zr, Nb, Ag, or Ta, Solar Energy Mater.
121 citations
TL;DR: WO3 nanoparticles loaded in TiO2 nanotube arrays, fabricated by a chemical bath deposition (CBD) technique in combination with a pyrolysis process, is uniform and the diameter can be easily adjusted by the deposition times as discussed by the authors.
Abstract: WO3 nanoparticles loaded in TiO2 nanotube arrays, fabricated by a chemical bath deposition (CBD) technique in combination with a pyrolysis process, is uniform and the diameter can be easily adjusted by the deposition times. The resultant hybrid nanotubes array shows a multistage coloring electrochromic response at different potential bias. The formation of a 3-dimensional WO3/TiO2 junction promotes unidirectional charge transport due to the one-dimensional features of the tubes, which leads to the significant positive-shift onset potential of the cathodic reaction (ion insertion) and the highly increased proton storage capacity. Compared to non-decorated nanotube arrays, the enhanced electrochromic properties of longer lifetime, higher contrast ratio (bleaching time/coloration time), and improved tailored electrochromic behavior could be achieved using the composite films.
120 citations