Electrochromic Materials

The aerosol assisted chemical vapor depoFigure 3sition of monoclinic vanadium pentoxide coatings was performed on fluorine doped tin dioxide glass substrates using vanadyl (V) triisopropoxide at 400 oC for various growth periods. It was observed that the sample grown for 1 h presented the best electrochemical response in terms of the highest charge storage (30 mC cm-2) and the difference in transmittance in the visible and near-infrared spectral regions (27 % at 650 nm and 17 % at 900 nm) with a fast response time (12 s for coloration and 10 s for bleaching).

 

Thermochromic Materials

thermoThis work reports the growth of thermochromic amorphous vanadium dioxide coatings on SnO2-precoated glass substrates by atmospheric pressure chemical vapor deposition using vanadyl (V) triisopropoxide as single-precursor at 450 oC. The best reversible transition behavior was at 65.5 oC as derived from the transmittance-temperature measurements.

Electroactive Materials

72HR-HCL-10M-4In this work, vanadium oxide coatings were deposited on FTO glass substrates by hydrothermal synthesis varying the pH solution with hydrochloric acid. The coatings were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and cyclic voltammetry. The effect of pH solution on the morphology and electrochemical properties of the samples are considered. It was found that the rhombohedral structures of NH4V3O8 enhance the electrochemical properties compared to the hexagonal ones.

 

Poster price in International Conference on Advanced Complex Inorganic Nanomaterials from CrystEngComm (Royal Society of Chemistry).

Electroactive Materials

Hydrothermally grown monoclinic tungsten trioxide on fluorine doped tin dioxide glass substrates was performed using an aqueous solution Imageof tungsten trioxide in powder form adjusting the pH through HCl for various growth periods at 95 oC. Enhanced crystalline quality oxide coatings were obtained using HCl concentration of 6 M for 24 h. These samples exhibited large crystallites consisting of agglomerated nanoparticles. It has been found that they presented an intercalated charge storage capability of 3.97 C cm-2.

Electroactive Materials

hydrothermally grownThe hydrothermal growth of crystalline β-V2O5 microstructures was performed on fluorine doped tin dioxide glass substrates using oxalic acid to adjust the pH of the solution for various deposition periods. It was observed that the sample grown for 48h at pH 2 exhibited the best electrochemical response in terms of the highest specific charge and capacitance, being 772Cg-1 and 386Fg-1 respectively.

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Welcome

Center of Materials Technology and Photonics (CEMATEP) is a joint laboratory of the departments of the School of Applied Technology of the Technological Educational Institute of Crete (TEI Crete), established in 2003. Its activities are dedicated to the growth, study and application of novel materials and photonics.

Research activities

The research efforts in CEMATEP are focused on the exploitation of advanced thin films, nanostructures and nanocomposites suitable for applications like solar cells, chromic layers for solar control coatings, optoelectronics, photodetectors and organic electronics. CEMATEP is well equipped with state of the art facilities and its members have important scientific outcome as well as excellent national and international collaborations.