In the modern world, around 40% of all energy is consumed in buildings. The energy needs tend to increase together with the standards of living and can thus be expected to further increase in the future. Smart windows that adjust the light transmission have the potential to combat this trend. By use of smart windows one can regulate the transport of light and heat through the window, e.g. reduce the transmission on hot days while still keeping a clear view on cold days or when the sun is not shining. This kind of windows can reduce the demand for energy for heating, cooling and lightning in modern buildings. The proposal is related to establishing scientific collaboration on the above topic between International leading Institutions in France and Norway with subsequent project developments for EU Institutions. Research focus of the proposal will be related to fabrication of a photochromic demonstrator device, preliminary testing and characterization of the device both realistic usage conditions and accelerated ageing, study of stability with respect to environmental conditions such as humidity and thermal variations, identify the market potential of the devices and perform a cost analysis. The project will enhance French-Norwegian collaboration by exchange visits, sharing of infrastructure and equipment, exchange of ideas and competence on advanced chromogenic materials. The possibility of dissemination by inviting a session at E-MRS will be discussed. The project presents good balance between genders as well as early stage and experienced scientists. This is multidisciplinary project that combine the complementary expertise of the research partners in materials scientists, smart windows, physics, chemistry, and modeling. The project will help to keep Norway and France at the forefront of new developments in smart window research, which in the future will lead to joint EU project developments, high impact publications and business opportunities.