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The Effect of Alkali Metal (Na, K) Doping on Thermochromic Properties of VO2 Films

Top, I; Schläfer, J; Binions, R; Papakonstantinou, I; Srimurugananthan, S; Powell, M; Parkin, I; ... Abrahams, I; + view all (2018) The Effect of Alkali Metal (Na, K) Doping on Thermochromic Properties of VO2 Films. MRS Advances , 3 (32) pp. 1863-1869. 10.1557/adv.2018.70. Green open access

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Abstract

This work reports the synthesis of undoped and alkali metal doped thermochromic vanadium dioxide thin films by sol-gel spin coating and subsequent low-temperature annealing at 450 °C in N 2 -H 2 atmosphere. The effect of sodium and potassium on the phase transition temperature as well as on the solar modulations were investigated. A dopant concentration of 0.3 at% resulted in a reduction of the critical transition temperature (T c ) from 62 °C to 57 °C and 47 °C for the sodium and potassium doped films, respectively. Moreover, both dopants improved the solar modulations (ΔT sol ) of the undoped VO 2 films from 3.81 to 9.44 and 5.43 %, respectively.

Type: Article
Title: The Effect of Alkali Metal (Na, K) Doping on Thermochromic Properties of VO2 Films
Open access status: An open access version is available from UCL Discovery
DOI: 10.1557/adv.2018.70
Publisher version: https://doi.org/10.1557/adv.2018.70
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office
URI: http://discovery.ucl.ac.uk/id/eprint/10046754
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