title: Mg-doped VO2 nanoparticles: hydrothermal synthesis, enhanced visible transmittance and decreased metal-insulator transition temperature.
abstract: This paper reports the successful preparation of Mg-doped VO2 nanoparticles via hydrothermal synthesis. The metal-insulator transition temperature (T(c)) decreased by approximately 2 K per at% Mg. The Tc decreased to 54 °C with 7.0 at% dopant. The composite foils made from Mg-doped VO2 particles displayed excellent visible transmittance (up to 54.2%) and solar modulation ability (up to 10.6%). In addition, the absorption edge blue-shifted from 490 nm to 440 nm at a Mg content of 3.8 at%, representing a widened optical band gap from 2.0 eV for pure VO2 to 2.4 eV at 3.8 at% doping. As a result, the colour of the Mg-doped films was modified to increase their brightness and lighten the yellow colour over that of the undoped-VO2 film. A first principle calculation was conducted to understand how dopants affect the optical, Mott phase transition and structural properties of VO2.
authors.affiliation: Shanghai Institute of Ceramics (SIC), Chinese Academy of Sciences (CAS), Dingxi 1295, Changning, Shanghai 200050, China.
authors.forename: Jiadong
authors.initials: J
authors.lastname: Zhou
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Gao
authors.forename: Xinling
authors.initials: X
authors.lastname: Liu
authors.forename: Zhang
authors.initials: Z
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Dai
authors.forename: Chuanxiang
authors.initials: C
authors.lastname: Cao
authors.forename: Hongjie
authors.initials: H
authors.lastname: Luo
authors.forename: Minoru
authors.initials: M
authors.lastname: Kanahira
authors.forename: Chao
authors.initials: C
authors.lastname: Sun
authors.forename: Liuming
authors.initials: L
authors.lastname: Yan