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ELECTROCHROMIC REAR-VIEW MIRRORS

Objective


A systematic investigation of materials combinations, sputtering, CVD and lamination technology was performed in order to fulfil these market requirements. At the start, a reselection of desirable options was carried out, taking into account the rapidly changing stat-of-the-art. It was decided to carry on a concept of device based on the use of a Li+ conductor. From there, materials technologies and electronics were developed in separate tasks. This was combined into the assembly and testing of laboratory scale models. The work lead to the production of a number of samples of the different layers, both deposited by PVD and CVD. A dedicated CVD machine was built for the programme.

The requested performances have been approached by the latest 5x5 cm{2} produced devices. The scaling-up of the most promising models, in spite of the fact that they still were not completely homogeneous, up to full mirror sizes (30 x 10 cm{2}) was also attempted on flat substrates. The research lead also to the identification of a new class of materials suitable for application as counter-electrode in the devices, which led to the production of cells which can switch from an almost completely transparent state to a completely coloured one.
Recently, electrochromic rear-view mirrors ECREAM have been introduced by Japanese and US producers of antiglare applications in cars. European industry whishes to develop a European ECREAM, preferably with improved properties over existing products with respect to reflected light in the day and night positions, the response time, the number of day/night cycles and the resistance towards UV light for outside mirrors. In the project, expertise is combined in glass, ec materials, deposition and lamination technology and electronics, together with car mirror expertise.

From the "baseline" expertise on, by using advanced materials, technologies and ec mirror concepts, ECREAM improvements will be striven for by systematic investigations of materials combinations, sputtering, CVD and lamination technology and by using symmetric and asymmletric concepts of the ec multilayer stack. Thus, it is expected that a European ECREAM patent position will be built up.

At the start, a reselection of desirable options will be carried out, taking into account the rapidly changing state-of-the-art. From there, materials technologies and electronics will be developed in separate tasks. This will be combined into the assembly and testing of laboratory scale models. Satisfactory models will be scaled up to mirror sizes and their performance tested. Finally, a prototype design will be made and tested.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Gilardini SpA
Address
Viale C. Emanuele Ii 150
10078 Venaria Reale Torino
Italy

Participants (5)

AIXTRON GmbH
Germany
Address
Kackertstraße 15-17
52072 Aachen
COAT AB
Sweden
Address
Datavagen 21B
43632 Askim
FLABEG GmbH
Germany
Address
Siemenstraße 1-3
90766 Fürth
TNO
Netherlands
Address
(Pobox 6031)
2600 JA Delft
TU CHALMERS
Sweden
Address
Chalmers Science Park
41288 Gothenburg