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Workshops & seminars

Electrochromic Properties of Vanadium Pentoxide Nanostructured Thin Films


Date & time
Thursday, August 6, 2015
3 p.m. – 4 p.m.
Speaker(s)

Afaf Almoabadi, Dr. Truong Vo-Van’s MSc student

Cost

Free

Organization

Department of Physics

Contact

514-848-2424 ext. 3270

Where

Central Building
7141 Sherbrooke W.
Room CC 312

Wheel chair accessible

Yes

We explored new methods for preparing porous vanadium pentoxide thin films to improve their electrochromic performance. Films were deposited on indium-tin-oxide substrates by dip-coating at both room- and sub-zero temperature (-100C), and porosity in the sol-gel prepared vanadium pentoxide film was created by using templating methods. In the first part of our work, the morphology, optical and electrochromic properties of the macro- and mesoporous films, prepared in the presence of structure-directing agents such as polystyrene microspheres and triblock copolymer, have been compared with those of dense films. By using various methods to remove the template material, it was shown that the morphology of the vanadium pentoxide film can be controlled and new nanostructures can be created.

 

The electrochromic performance of the nanorods prepared through the thermal treatment was found to be superior to that of the vanadium pentoxide with the layered structure, especially in the near-infrared region, demonstrating their potential for different electrochromic applications. In the second part of our work, sub-zero temperature dip coating was used to create nanostructured films. Both layered (dense and porous) and nanorod films were prepared and characterized, showing the interesting features provided by the sub-zero temperature coating method. Scanning electron microscopy, cyclic voltammetry and electrical impedance spectroscopy measurements were used for the characterization of the different V2O5 films.

 

All Faculty, staff and students are invited
Coffee will be served in the Department of Physics
SP-367-11 at 2:30 PM
Information: 514 848-2424 ext. 3270

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