New effective process to fabricate fast switching and high contrast electrochromic device based on viologen and Prussian blue/antimony tin oxide nano-composites with dark colored state

We developed a new electrochromic device by using compact Prussian blue (PB)/antimony tin oxide (ATO) nano-composites as anodic electrode and viologen anchoring on titanium dioxide (TiO 2) nano-particles as cathodic electrode. The anodic electrode was based on a transparent nanostructured ATO nano-p...

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Bibliographic Details
Published in:Electrochimica acta 2011-07, Vol.56 (17), p.6230-6236
Main Authors: Rong, Yu, Kim, Sooyeun, Su, Fengyu, Myers, Daniel, Taya, Minoru
Format: Article
Language:English
Subjects:
Anodic
Antimony tin oxide
Applied sciences
Chemistry
Devices
Display
Electrochemistry
Electrochromic display
Electrochromism
Electrodes
Electronics
Exact sciences and technology
General and physical chemistry
Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)
Nano-composites
Nanocomposites
Nanomaterials
Nanostructure
Prussian blue
Titanium dioxide
Viologen
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Summary:We developed a new electrochromic device by using compact Prussian blue (PB)/antimony tin oxide (ATO) nano-composites as anodic electrode and viologen anchoring on titanium dioxide (TiO 2) nano-particles as cathodic electrode. The anodic electrode was based on a transparent nanostructured ATO nano-particle film and was electro-deposited by Prussian blue to form compact Prussian blue/ATO nano-composites by means of galvanostatic electrodeposition process. Nanocrystalline TiO 2 thin films on conducting glass were modified with a mono-layer of viologen with two anchoring groups, which were much strongly adsorbed onto the surface of TiO 2 nano-particles. A polymer gel electrolyte sandwiched between the anodic and cathodic layers is used as the ionic transport layer. The 2.5 cm × 2.5 cm electrochromic device shows high contrast (64.8%, at 600 nm) very low transmittance at colored stage (0.1%, at 600 nm), fast switching time (600 and 720 ms for coloration and bleaching, respectively), high coloration efficiency of 912 cm 2 C −1 at 600 nm and good stability. The enhanced performance of the electrochromic device can be attributed to the ATO nano-particles as inter-conductive materials.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2011.02.110