MoO3 nanowire growth on VO2/WO3 for thermochromic applications

Abstract

This study explores the structural, electronic, and optical properties of sandwich-structured thin films composed of WO₃, MoWO₃, and MoO₃ as window layers on VO₂/WO₃via a physical vapor deposition method. Morphological analysis demonstrates the evolution of distinct nanowires, offering insights into the lattice strain of the VO₂ layer toward high-performance thermochromatic devices. Temperature-dependent sheet resistivity is investigated, showcasing significant improvements in conductivity for samples with MoO₃ as a window layer. The electrical and optical properties of the MoO₃/VO₂/WO₃ device showed a phase transition temperature (T_c) of 36.8 °C, a transmittance luminous (T_lum) of 54.57%, and a solar modulation ability (ΔT_sol) of 12.43. This comprehensive analysis contributes to understanding the growth of nanowires on multi-layered thin films, offering valuable insights into potential applications in bright windows.