Thermochromic vanadium oxide thin films: Electronic and optical properties
2014 (English)In: INERA Workshop: Transition Metal Oxides as Functional Layers in Smart windows and Water Splitting Devices / Parallel session of the 18th International School on Condensed Matter Physics / [ed] Kostadinka Gesheva, Institute of Physics Publishing (IOPP), 2014, 012001- p.Conference paper (Refereed)
Vanadium dioxide, VO2, is a widely studied thermochromic material with potential applications in energy efficient window technology. It undergoes a first-order metal-to-insulator transition, accompanied by a crystal structure transformation from monoclinic to tetragonal rutile, at a critical temperature of 68 oC. Below this temperature, VO2 is semiconducting and infrared transmitting whereas it is metallic and infrared reflecting above the transition temperature. However, in order to achieve significant thermochromic switching, the luminous transmittance of thin films will be less than 0.5 . Here we report on recent research to improve the luminous transmittance as well as the transmittance change at the transition temperature. We systematically evaluate the effect of antireflection coatings, doping with Mg and the performance of coatings comprising thermochromic nanoparticles in a transparent matrix. The last option is shown to give the best performance and holds great promise for practical applications.
Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2014. 012001- p.
, Journal of Physics: Conference Series, ISSN 1742-6588 ; 559
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-236339DOI: 10.1088/1742-6596/559/1/012001ISI: 000346420600001OAI: oai:DiVA.org:uu-236339DiVA: diva2:764035
INERA Workshop of ISCMP 2014: Transition Metal Oxide Thin Films. Functional Layers in "Smart Windows" and Water Splitting Devices: Technology and Optoelectronic Properties. Varna, Bulgaria, Sept. 4-6, 2014.