VO₂ Nanoparticles‐Based Thermochromic Smart Windows

Abstract

Vanadium dioxide (VO2) has reversible metal‐to‐insulator phase transitions (MIT) under thermal stimuli, which is a traditional and widely studied material for thermochromic smart window applications. Current research interests in VO2 materials design focused on decreasing phase change temperature (τc), increasing both luminous transmittance (Tlum) and solar modulating ability (▵Tsol). This review focuses on strategies for improving the thermochromic properties of VO2, including elemental doping to composite materials, improving the solar energy modulation ability, ameliorating color, elevating phase change efficiency, increasing durability, and enhancing energy efficiency. The challenges and opportunities of VO2 nanoparticles‐based thermochromic smart windows are discussed in the outlook section.

Self-powered VO2 phase transition based on triboelectric nanogenerator

“…9–11 This phenomenon has garnered considerable attention in the fields of phase transition memories, intelligent windows, and optical devices. 12–16 To decrease the critical temperature and modulate the MIT process of VO 2 , researchers have attempted various approaches, which include doping with different elements, 17,18 applying external electric fields, 19,20 and utilizing interface strain. 21,22 However, the reliance on external power sources or equipment poses a significant drawback due to the associated high usage costs and complex operations, thus, a self-powered VO 2 phase transition modulation method is highly desired.…”