Gate-controlled VO 2 phase transition for high-performance smart windows
Open Access
- 1 March 2019
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science Advances
- Vol. 5 (3), eaav6815
- https://doi.org/10.1126/sciadv.aav6815
Abstract
Vanadium dioxide (VO2) is a promising material for developing energy-saving “smart windows,” owing to its infrared thermochromism induced by metal-insulator transition (MIT). However, its practical application is greatly limited by its relatively high critical temperature (~68°C), low luminous transmittance (2 film. With a solid electrolyte layer assisting gating treatment, we modulated the insertion/extraction of hydrogen into/from the VO2 lattice at room temperature, causing tristate phase transitions that enable control of light transmittance. The dramatic increase in visible/infrared transmittance due to the phase transition from the metallic (lightly H-doped) to the insulating (heavily H-doped) phase results in an increased solar energy regulation ability up to 26.5%, while maintaining 70.8% visible luminous transmittance. These results break all previous records and exceed the theoretical limit for traditional VO2 smart windows, making them ready for energy-saving utilization.Keywords
Funding Information
- National Natural Science Foundation of China (11574279)
- National Basic Research Program of China (2014CB848900)
This publication has 57 references indexed in Scilit:
- Finely tuning electrolytes and photoanodes in aqueous solar cells by experimental designSolar Energy, 2018
- Interfacial Effects in Solid–Liquid Electrolytes for Improved Stability and Performance of Dye-Sensitized Solar CellsACS Applied Materials & Interfaces, 2017
- Luminescent Downshifting by Photo‐Induced Sol‐Gel Hybrid Coatings: Accessing Multifunctionality on Flexible Organic Photovoltaics via Ambient Temperature Material ProcessingAdvanced Electronic Materials, 2016
- Photoelectrochromic devices: Influence of device architecture and electrolyte compositionElectrochimica Acta, 2016
- Efficient luminescent solar cells based on tailored mixed-cation perovskitesScience Advances, 2016
- A UV-prepared linear polymer electrolyte membrane for dye-sensitized solar cellsPhysica B: Condensed Matter, 2014
- Life cycle energy analysis of buildings: An overviewEnergy and Buildings, 2010
- Properties, requirements and possibilities of smart windows for dynamic daylight and solar energy control in buildings: A state-of-the-art reviewSolar Energy Materials and Solar Cells, 2010
- Mott Transition in VO 2 Revealed by Infrared Spectroscopy and Nano-ImagingScience, 2007
- : Peierls or Mott-Hubbard? A view from band theoryPhysical Review Letters, 1994