Optimization and Validation of the Thermochromic Performance of a Trilayer Coating of TiO<sub>2</sub>/VO<sub>2</sub>/TiO<sub>2</sub> for Smart Windows
Martin Becker, Yan Ravil Wollenweber-Bienerth, Saskia Hartmann, A. Polity, Sangam Chatterjee, Peter J. Klar
Abstract
High Resolution Image Download MS PowerPoint Slide Global energy consumption and the imperative to mitigate climate change have driven the exploration of innovative technologies to enhance energy efficiency in buildings. Among these, smart windows utilizing thermochromic vanadium dioxide-based materials as active materials have emerged as a promising avenue. These windows dynamically modulate their optical properties in response to environmental conditions, helping to reduce the energy consumption for heating/cooling of the building. However, the practical implementation of VO 2 -based smart windows faces challenges related to optimizing their performance and durability. In this context, this review advocates for further research into VO 2 -based smart windows incorporating titanium dioxide (TiO 2 ) buffer layers and TiO 2 antireflection (AR) coatings. Rutile TiO 2 buffer layers are used to promote growth of the VO 2 functional films. Additionally, TiO 2 antireflection coatings can improve the optical performance of smart windows by minimizing reflections and maximizing light transmission. This work highlights how TiO 2 -based layers may be used to form a multilayer system surrounding the active VO 2 layer in order to enhance the efficiency of VO 2 -based smart windows. The proposed application of rutile TiO 2 buffer layers and anatase TiO 2 AR layers holds promise for advancing the development of energy-efficient building technologies.