What is it about?
Sodium and potassium doped thermochromic vanadiun dioxide thin films were prepared by sol-gel spin coating. The effect of the dopants on the thermochromic properties, namely the ciritical transition temperature and the hysteresis loop width have been investigated.
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Why is it important?
-This is the first experimental work has been done on Na and K doped VO2 films. -An exceptionally low crystallisation temperature of 450 C was obtained. -The both dopants offered a reduction in the transition temperature, as well as increased the Tsol and NIR transmittance modulation, whilst caused a slight increase in the hysteresis loop width, -The sol-gel spin coating allowed a cheap, easy and versatile way to produce doped thermochromic films without a requirement of any sophisticated equipment. -The experimental work resulted in consistent results with the calculation methods. -It broadens the application of thermochromic thin films as energy efficient windows.
Perspectives
This article lead to a great research and discussion on a dopant which has never been employed before. This research also led to form collaborations from different universities to achieve greater results.
Isil Top
Queen Mary University of London
Read the Original
This page is a summary of: The Effect of Alkali Metal (Na, K) Doping on Thermochromic Properties of VO2 Films, MRS Advances, January 2018, Cambridge University Press,
DOI: 10.1557/adv.2018.70.
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