Rapid thermal annealing assisted facile solution method for tungsten-doped vanadium dioxide thin films on glass substrate

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Mengqin Kong
  • Chao Ping Liu
  • Christopher Yu Hang Chao

Detail(s)

Original languageEnglish
Article number155053
Journal / PublicationJournal of Alloys and Compounds
Volume833
Online published8 Apr 2020
Publication statusPublished - 25 Aug 2020

Abstract

Vanadium dioxide VO2 is an important thermochromic material with useful applications in smart energy devices. This paper describes the synthesis of high-quality vanadium dioxide thermochromic thin films directly on glass substrate without any barrier layer prepared using a simple solution method. We demonstrate that 50 nm thick VO2 films display excellent visible transmittance (76.9% on glass, 69.4% on fused silica) and a large NIR switching efficiency (33.8% on glass, 44.3% on fused silica) at 1600 nm. It is found that the metal to semiconductor phase transition temperature Tc of undoped films can be reduced from a theoretical value of 68 °C to 49.4 °C by rapid thermal annealing. With W doping a continuous drop in the Tc is observed and for VO2 with 2% W doping, a Tc of 25.8 °C is achieved. These good optical properties and the near room-temperature phase transition temperature suggest that solution processing with the rapid thermal annealing process is a feasible method to obtain this promising material on glass substrate for practical application in thermochromic smart windows.

Research Area(s)

  • Rapid thermal annealing, Solar modulation, Solution processing, Spin coating, Thermochromic start window, Vanadium dioxide

Citation Format(s)

Rapid thermal annealing assisted facile solution method for tungsten-doped vanadium dioxide thin films on glass substrate. / Kong, Mengqin; Egbo, Kingsley; Liu, Chao Ping; Hossain, Mohammad Kamal; Tso, Chi Yan; Hang Chao, Christopher Yu; Yu, Kin Man.

In: Journal of Alloys and Compounds, Vol. 833, 155053, 25.08.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal