Strongly thermochromic behavior of doped VO2 switching at low temperature for spacecraft thermal control

William Ravisy; Thomas Pouit; Bruno Bras; Szilvia Szmolka; Philipp Hager; Laurent Dubost

doi:10.1117/12.3023007

18 June 2024 Strongly thermochromic behavior of doped VO2 switching at low temperature for spacecraft thermal control

William Ravisy, Thomas Pouit, Bruno Bras, Szilvia Szmolka, Philipp Hager, Laurent Dubost

Proceedings Volume PC13020, Advances in Optical Thin Films VIII; PC130200P (2024) https://doi.org/10.1117/12.3023007
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

Thermochromic materials are of high interest for their potential applications in spacecraft thermal control, with systems exhibiting variable emissivity able to manage the heat rejection and absorption. VO2 presents one of the most prominent technological options for thermochromic behaviors, with a transition temperature around 68°C limiting its practical utility for spacecraft thermal control notably. Here, we report the synthesis of strongly thermochromic tungsten doped vanadium dioxide coatings on silicon wafers obtained in an industrial-size vacuum deposition chamber. Samples with various W doping rates were deposited by magnetron sputtering, exhibiting thermochromic transition temperatures from 38°C to as low as 5°C, with optical transmission contrasts at a wavelength of 12 µm maintained between 40% and 58%, enabling enhanced control of heat exchange at low temperature and broader usability. The variable emissivity radiators were measured to have emissivity contrasts up to 40%, with transition temperatures as low as 10°C, demonstrating the potential use of the VO2-based thermochromic coating.

Conference Presentation

Citation Download Citation

William Ravisy, Thomas Pouit, Bruno Bras, Szilvia Szmolka, Philipp Hager, and Laurent Dubost "Strongly thermochromic behavior of doped VO2 switching at low temperature for spacecraft thermal control", Proc. SPIE PC13020, Advances in Optical Thin Films VIII, PC130200P (18 June 2024); https://doi.org/10.1117/12.3023007

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available