Epitaxial growth and thermochromic properties of B-phase VO2 thin films on SrTiO3 substrate

Vanadium dioxide of B-phase [VO2(B)] has been considered as an ideal cathode material and storage materials, but was rarely treated as optical modulating coatings based on the metal-insulator transition. Here we deposited high quality epitaxial VO2(B) thin films on STO (100) substrates, measured the optical properties variation among cooling and heating (100-300 K), and discussed the modulating ability using fully reversible optical hysteresis loop. Our work provides a comprehensive scenario of the VO2(B) thin film in physical performance, and promotes the use of VO2 (B) thin film on dimming devices and optical signals in extremely low temperature environments. (C) 2018 The Japan Society of Applied Physics