Electrochromic Devices
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Monochromatic double coloring effect on V2O5 thin films deposited by electron beam
ABSTRACT Electrochromic material is a thin film technology that has a close relationship with environmental sustainability since they can control the light and heat that enter and leave a building. Vanadium oxide films are electrochemically active for lithium and electron co-intercalation, presenting low optical variation in the low energy visible light, whi
Matéria (Rio J.). Publicado em: 25/11/2019
-
2. Transmissive to Dark Electrochromic and Fluorescent Device Based on Poly(fluorene-bisthiophene) Derivative
Films of a poly(fluorene-bisthiophene) derivative, named PFBT, were electrodeposited onto indium tin oxide (ITO) electrodes and their electrochromic and fluorescence properties were investigated. Such films displayed color variation from yellow, in the neutral state, to green, in the oxidized state, as shown by tracking of the CIE (Commission Internationale
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
-
3. Synthesis of Poly (2,5-dimethoxyaniline) and Electrochromic Properties
Poly(2,5-dimethoxyaniline) (PDMA) was synthesized using electrochemical polymerization of DMA in oxalic acid. The PDMA film coated onto ITO glass was studied for its chemical structure, morphology, electro-deposition, and electro-activity by FT-IR, TGA, SEM, cyclic voltammetry, and UV-Vis spectrophotometry. The PDMA film showed reversible color changes from
Mat. Res.. Publicado em: 25/08/2015
-
4. Investigação das propriedades estruturais e óticas de filmes finos e nanoestruturados de óxido de vanádio depositados por feixe de elétrons
Neste trabalho foi realizado um estudo das propriedades optoeletroquímicas e estrutural de filmes finos de óxidos de vanádio (V) com objetivo de investigar o comportamento de eletrodos destes filmes frente ao fenômeno da dupla coloração, espectral e monocromática, e sua capacidade de intercalação para íons de lítio. Os filmes foram depositados por
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/03/2012
-
5. Eletrodos modificados por hidróxido de níquel: um estudo de revisão sobre suas propriedades estruturais e eletroquímicas visando suas aplicações em eletrocatálise, eletrocromismo e baterias secundárias
The present review paper describes the main features of nickel hydroxide modified electrodes covering its structural and electrochemical behavior and the newest advances promoted by nanostructured architectures. Important aspects such as synthetic procedures and characterization techniques such as X-Ray diffraction, Raman and Infrared spectroscopy, Electroni
Química Nova. Publicado em: 2010
-
6. Oligômeros e polímeros derivados do tiofeno: síntese e aplicações
In this review we summarize recent synthetic investigations about the preparation of oligothiophenes and polythiophenes, the most important π-conjugated organic materials for applications in electrochromic and electroluminescent devices. It is showed that many interesting and novel functionalized oligothiophenes have been synthesized by convenient coupling
Química Nova. Publicado em: 2010
-
7. Filmes automontados de óxidos metálicos: eletrocromismo e armazenamento de energia / Self-Assembled films composed of transition metal oxides for electrochromism and charge storage
Thin films of titanium dioxide (TiO2), poly(vinyl sulfonic acid) (PVS) and tungsten oxo-hydroxy (WOxHy) were prepared using the Layer-by-Layer (LbL) method, allowing for strict control of its thickness and nanoarchitecture. The properties of these films concerning lithium ion transport and storage were investigated, so that these materials can be applied in
Publicado em: 2009
-
8. Synthesis and characterization of copper hexacyanoferate nanoparticles and its application in Glucose Biosensor and electrochromics electrodes / Síntese e caracterização de nanopartículas de hexacianoferrato de cobre e sua aplicação em biossensores de glicose e eletrodos eletrocrômicos
In this work, the sonochemical synthesis and the characterization of copper hexacyanoferrate nanoparticles for producing ultra thin films with controlled thickness is reported. Due to its nanometric structure and the excess of superficial negative charges, the proposed immobilization methods were the electrostatic deposition layer by layer (LBL), using the P
Publicado em: 2007
-
9. Eletrólitos poliméricos a partir de amidos de mandioca modificados (catiônico, eterificado e oxidado) / Electrolytes polimerics from modified cassava starches (cationic, etherified and oxidated)
Natural polymers are very interesting matrix to obtain solid polymeric electrolytes (SPE). The principal advantage comes from its particularly interesting biodegradation properties due to the natural precedence and also very low cost and good physical and chemical properties. These polymers contain heteroatoms in its structure and for this reason can complex
Publicado em: 2007
-
10. "Electrochromic devices with solid polymeric electrolytes based on starch" / "Dispositivos eletrocrômicos com eletrólitos sólidos poliméricos à base de amido"
This dissertation presents the results of preparation and characterization of five electrochromic devices (DEC) composed of thin films of transition metal oxides, such as WO3, WO3:Ta, Nb2O5:Mo and NiOx as electrochromic layers and CeO2-TiO2 as a transparent counter-electrode. The electrolytes used in these devices were starch-based plasticized with glycerol
Publicado em: 2006
-
11. Study of lithium-ion transport in hybrid organic-inorganic nanocomposite and performance in electrochromic devices. / Estudo do transporte de íons Li+ em híbrido orgânico-inorgânico (SPHP) e nanocompósito (NHP) e seu desempenho em dispositivos eletrocrômicos.
O principal objetivo deste trabalho foi descrever o transporte de íons lítio em novos polieletrólitos híbrido puro (SPHP) e com nanopartículas (NHP), avaliando o seu desempenho em dispositivos eletrocrômicos tradicionais. A síntese química usada para preparar essa nova classe de materiais foi baseada num processo químico não hidrolítico, conhecido
Publicado em: 2006
-
12. Estudo das propriedades eletro- e fotoeletroquimicas do composito TiO2/PPi
Great advances were reached in the last three decades in the development of materials which bring together properties that are of interest in technological applications. The conducting polymers, since their discovery in 1977, were extensively studied in order to be used, e.g., in battery and electrochromic devices. Nowadays, the reseach about this matter is
Publicado em: 2002