X-chromics coatings
- 15h45 - 17h30
- Conference by Mr. François CREUZET, Chef de Service
Service Couches Minces - Saint-Gobain Recherche
- Solar control thanks to electrochromic windows.
-
Description :
Electrochromic materials can change reversibly their colour by ion insertion/de-insertion – hence, WO3, one of the most studied material, commutes between transparent and deep blue states. Deposited as thin films at the surface of a window, into a multilayer stack allowing the control of the insertion state, these electrochromic materials allow the modification of the luminous and/or energetic characteristics of the so-called “active” window. We will present here the principle of these systems, the more recent advances in the area and some examples of existing or potential applications.
- Conference by Mr. David HORWAT
Schefenacker Vision Systems France S.A.
- Towards a « full mineral » electrochromic device
- Description:
The function of electrochromic devices is to regulate optical transmission (or reflexion). They constitute particularly well adapted elements for windows functionalising. The standard architecture is based on a stack of thin layers of different nature and function
One of these layers, the electrolyte, conditions the cost, the application potential and the lifetime of the stack. Nowadays electrolytes are polymeric gels which present a poor resistance to ageing, especially when they are exposed to UV irradiation of the sun, and make delicate the realisation of electrochromic devices on skew surfaces.
We will resume here the scientific processes which allowed the determination of an appropriate ceramic electrolyte, the development of a specific deposition method for its synthesis and the structural, optical and electrical tests performed alone or in the presence of the whole stack to valid the proposed concept.
- Conference by Mr. Jean François PIERSON
Laboratoire de Science et Génie des Surfaces - Institut National Polytechnique de Lorraine.
- Thermochromic coatings : principle and applications.
- Description :
Thermochromic materials undergo a reversible modification of their optical properties (transmittance, aspect, colour …) during a temperature variation. Among the different inorganic materials showing this property, vanadium dioxide (VO2) was the most studied due to the rather low temperature of its thermochromic transition (68°C).
This presentation will successively detail the metal-insulator transition of VO2, the processes allowing its deposition as thin films and the influence of doping elements on the transition temperature to finally lead to examples of applications of thermochromic coatings.
Top
Logo_pôle_verrier_EEIGm_CERFAV_école_d'architecture