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  Home > JCE Print > Journal of Chemical Education > Issues > 2006  > March  >
Chemistry for Everyone
Products of Chemistry
Intelligent Thermochromic Windows
Ivan P. Parkin and Troy D. Manning
Department of Chemistry, University College London, London, UK WC1H OAJ
Cover
March 2006
Vol. 83 No. 3
p. 393
Abstract
This article covers the background and related science associated with a thermochromic window. A thermochromic window is a device that changes its reflectance and transmission properties at a specific critical temperature. At this temperature the material undergoes a semiconductor-to-metal transition—at low temperature the window will let in all of the sun's energy while above the critical temperature it will reflect the infrared portion of the sun's energy. Hence a thermochromic window could be used to significantly reduce air conditioning costs, which has consequential positive benefit in reducing electricity consumption and hence green house gas emissions. This article details the underlying science in making a new thin-film thermochromic coating by chemical vapor deposition; it describes the underlying physical chemistry associated with the semiconductor-to-metal transition and shows how substitutional doping within a crystal lattice can be used to lower the thermochromic switching temperature.
More Information
*  Citation
 Parkin, Ivan P.; Manning, Troy D. J. Chem. Educ. 2006 83 393.
*  Keywords
 First-Year Undergraduate / General; General Public; Inorganic Chemistry; Interdisciplinary / Multidisciplinary; Materials Science; Physical Chemistry; Physical Properties; Scandium; Second-Year Undergraduate; Solid State Chemistry; Textbooks / Reference Books; Upper-Division Undergraduate
*  History
 Created:
Last Updated:		 1/31/2006
2/6/2006
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