# High-Performance Thermochromic Multilayer Coatings of W‑Doped VO2 Nanoparticles Dispersed in an SiO2 Matrix Prepared on Glass at a Low Temperature

## TL;DR

A new low-temperature method creates high-performance thermochromic coatings for glass that can change transparency with temperature.

## Contribution

A novel thermochromic coating with high performance and low-temperature fabrication is developed for building glass applications.

## Key findings

- The coating has a transition temperature of 33°C with high luminous transmittance in both states.
- The solar energy transmittance modulation reaches 15.3%.
- The coating can be fabricated at 350°C without atmospheric exposure.

## Abstract

We report a high-performance thermochromic VO2-based
coating prepared on standard glass at a low substrate temperature
of 350 °C without opening the vacuum chamber to the atmosphere.
It is formed by four layers of W-doped VO2 nanoparticles
dispersed in the SiO2 matrix. The coating exhibits a transition
temperature of 33 °C with an integral luminous transmittance
of 65.4% (low-temperature state) and 60.1% (high-temperature state),
and a modulation of the solar energy transmittance of 15.3%. Such
a combination of properties, together with the low temperature during
preparation, fulfills the requirements for large-scale implementation
on building glass and has not been reported yet.