All-solid-state inorganic electrochromic device processed by ultrasonic spray pyrolysis

Geoffroy Bister

Belgian Ceramic Research Centre

Geoffroy Bister is currently working as project leader at the Belgian Ceramic Research. He earned his Bachelor of Chemistry at University of Namur, Belgium in 1999, and his PhD in Chemistry in 2004 in the same university, working with Prof. Jànos B.Nagy. His thesis work was on the catalytic chemical vapor deposition synthesis of single walled carbon nanotubes. He was the first to obtain by CCVD nanotubes with an elastic modulus of 1 TPa. He co-authored the patent that lead to the creation of the society NANOCYL, specialized in the production of carbon nanotubes. He is currently working in the field of inorganic non-metallic materials where he is acting as a "Swiss army knife", notably active on SPS sintering, additive manufacturing, synthesis of photocatalytic nano-layers, nanomaterials standardization and development of solid electrolytes for electrochromic device. He is secretary of the Belgian Ceramic Society since 2010 and is open to discussion and to potential collaboration. Do not hesitate !

Abstract

Some metal oxides present electrochromic properties which means that their optical transmittance can be modified by the effect of insertion or extraction of electrical charges.These materials may be integrated in... [ view full abstract ]

Some metal oxides present electrochromic properties which means that their optical transmittance can be modified by the effect of insertion or extraction of electrical charges.

These materials may be integrated in architectural windows with the aim to control the light incoming or outgoing from a building (Smart windows). This technology is one of the keys of energy saving in domestic application in the future.

This work[1] demonstrates the possibility to design “all inorganic” electrochromic and electrolytic layers by the way of Ultrasonic Spray Pyrolysis (USP) technique. USP allows for the deposition of the different layers at ambient pressure and moderate temperature (350°C), and can be a low cost alternative to vacuum deposition techniques currently applied for commercial applications. USP is also considered for its upscaling abilities in comparison with other wet routes used at lab scale (spin-coating, dip-coating, electrodeposition…).

The efficiency of WO₃[2] and NiO[3] is shown as optically active layers. Some results on lithium aluminosilicate as solid state electrolytic layer will be shown.

Acknowledgement

This work has been performed in the field of the SMARTSPRAY research project (Greenomat program opened by the Walloon Region in 2011 – contract number 1117339).

[1] R. Cloots, C. Henrist, J. Denayer, A. Maho, F. Cambier, V. Lardot, G. Bister, P. Aubry, “Improved process of ultrasonic spray pyrolysis deposition of one or more electrochromic and/or electrolytic films on a substrate”, Patent WO2016/113050 A1.

[2] J. Denayer et al., “Ultrasonic spray pyrolysis of tungsten oxide films: effect of the temperature and the presence of surfactant on their electrochromic efficiency”, Solar Energy Materials and Solar Cells, Volume 130, November 2014, Pages 623–628.

[3] J. Denayer et al , “Surfactant-assisted ultrasonic spray pyrolysis of nickel oxide and lithium-doped nickel oxide thin films, towards electrochromic applications”, Applied Surface Science, Volume 321, December 2014, Pages 61-69.

Authors

Geoffroy Bister (Belgian Ceramic Research Centre)
Anthony Maho (GREEnMat-CESAM, University of Liège)
Jessica Denayer (GREEnMat-CESAM, University of Liège)
Philippe Aubry (Belgian Ceramic Research Centre)
Gilles Spronck (GREEnMat-CESAM, University of Liège)
Pierre Colson (GREEnMat-CESAM, University of Liège)
Bénédicte Vertruyen (GREEnMat-CESAM, University of Liège)
Véronique Lardot (Belgian Ceramic Research Centre)
Francis Cambier (Belgian Ceramic Research Centre)
Catherine Henrist (GREEnMat-CESAM, University of Liège)
Rudi Cloots (University of Liege)

Topic Areas

Tunable devices, thermistors, varistors , Synthesis , Processing , Electrochemical behavior , Conduction of electrons and ions

Session

OS-10A » Symposium A - Electroceramics for Sensors and Other Applications (11:30 - Thursday, 12th July, Aula Louis Verhaegen)

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