| 초록 |
Vanadium dioxide (VO2) has garnered considerable attention in recent years as a promising material for thermochromic window applications because of its reversible metal-insulator transition (MIT) near room temperature and corresponding significant changes in its optical properties. Utilizing good thermochromic window performance including high luminous transmittance (Tlum) and near-infrared modulation ability (ΔTNIR) as well as effective UV shielding has become the most important strategy for developing smart windows. However, the trade-off between improving Tlum and maintaining the ΔTNIR limits the commercialization of VO2-based smart windows. To overcome these restrictions, we manufactured nanoinks based on VO2 nanoparticles and fabricated films via spin-coating these inks on quartz substrates. In this study, a simple photolithography method is employed to produce micropatterned VO2 films with different periodicities. The dried VO2 films were sintered by intense pulsed light (IPL) sintering processes. These micropatterned structures could favorably transmit visible light without sacrificing high ΔTNIR, and the patterned films showed improved Tlum compared to continuous films. This facile fabrication method offers a new and promising direction for the use of VO2 thermochromic materials in smart window applications. |
