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Structure and optical properties of VO2 film derived from a low temperature sol-gel and facile thermal process

JI QI1,* , GUILING NING2, XIAOHUI QI1, QIANG WANG1

Affiliation

  1. Department of Chemical Engineering, Life Science College, Dalian Nationalities University, 18 Laohe West Road, Dalian 116600, China
  2. Department of Chemical Engineering of Material, School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, China

Abstract

A novel process was developed for preparing thermochromic VO2 film on commercial float glass by a low temperature V2O5 sol-gel method combined with a facile thermal reduction technique. The structure and optical properties of the films were determined by X-ray diffraction (XRD), Scanning Probe Microscopy (SPM), ultraviolet-visible (UV-Vis) spectroscopy and infrared (IR) spectroscopy. The as-prepared coating glass has larger transmittances at 343K than 293K from 717nm to 900nm, smaller transmittances at 343K than 293K from 2500nm to 4450nm. Through the thermochromic VO2 film the maximum transmittance difference between 343K and 293K is up to 50% in infrared wavelength..

Keywords

Vanadium dioxide, Sol-gel preparation, Thin films, Optical transmittance, Thermochromic properties.

Citation

JI QI, GUILING NING, XIAOHUI QI, QIANG WANG, Structure and optical properties of VO2 film derived from a low temperature sol-gel and facile thermal process, Optoelectronics and Advanced Materials - Rapid Communications, 4, 2, February 2010, pp.194-196 (2010).

Submitted at: Jan. 28, 2010

Accepted at: Feb. 2, 2010