In the quest to reduce energy consumption, smart windows present a core solution to reduce the massive energy loss through windows. Smart windows can be designed on the basis of electrochromic (EC) principles, which offer simple integration mechanisms for color switching, optical sensing, energy harvesting, and energy storage. Photo-optical modulation of the EC window was explored using a thin film of polymer and a redox active electrolyte layer along with a dye-doped photoanode. The integrated photo-electrochromic window (PECW) showed high transparency over 78 % at bleached state but blocked 97 % of light at colored state. Furthermore, the PECW was capable of solar energy harvesting, allowing self-coloration under sunlight. The photo-optical modulation mechanism, material combination, and optimization of an autonomous PECW will be discussed.
Here, we present two examples of strategies we have recently developed to elaborate ‘graphen-dye’ emitting platforms.
In the first example, graphene and an emitting 3D building block are combined to obtain a light emitting graphene-based hybrid 2D system. We report the first fluorescent molecular self-assembly on graphene. The quenching of the fluorescence of the adsorbed dye by the adjacent graphene is hindered at the molecular scale based on a spacer approach, through a specifically designed dual-functionalized self-assembling building block. The resulting optical properties of the whole graphene−dye hybrid system are characterized by absorption and fluorescence spectroscopies.
The second example deals with surface-confined host–guest chemistry in order to trap a functional 3D building block (3D Zn-Phthalocyanine complex) into a large 2D nanoporous template. Results on graphene with a 3D functional complex incorporating an emitter will be presented.
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