Band gap tuning possibilities in vanadium oxide

Depending upon the type of external stimuli, ‘Chromogenic’ materials are generally classified as photochromic, thermochromic, electrochromic and gasochromic materials where the external stimuli are light (photon), temperature, applied electric field and gaseous atmosphere (for e.g., H2 gas), respect...

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Bibliographic Details
Published in:Materials today : proceedings 2021, Vol.43, p.2939-2943
Main Authors: Kumawat, Ashish K., Nathawat, Rashi, Rathore, Satyapal S., Mukhopadhyay, Anoop Kumar
Format: Article
Language:English
Subjects:
Band gap tuning
Smart material
Thermochromic
UV–VIS Spectroscopy
Vanadium oxide
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Summary:Depending upon the type of external stimuli, ‘Chromogenic’ materials are generally classified as photochromic, thermochromic, electrochromic and gasochromic materials where the external stimuli are light (photon), temperature, applied electric field and gaseous atmosphere (for e.g., H2 gas), respectively. Among other analogues, thermochromic materials are part of larger class of ‘Intelligent’ or ‘Smart’ materials. These materials change their color upon heating. More generally speaking, their functional properties change with temperature. Vanadium oxides belong to this group of smart, thermochromic material. The thermodynamically stable variant of vanadium oxide, V2O5 is chosen in current study. The band gap of V2O5 synthesized by wet-chemical process, was observed to show dependence on the post heating temperature. This study suggest a possibility of band gap tuning by simple heat treatment.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2021.01.291