Sonderforschungsbereich 481

    Komplexe Makromolekül- und Hybridsysteme in inneren und äußeren Feldern

Subproject B4:

Charge Separation and Photovoltaics at Nanostructured Interfaces

Prof. Mukundan Thelakkat(Applied Functional Materials)

The project B4 addresses fundamental issues of charge separation, recombination and transport in Solid-state Dye-sensitised TiO2 Solar Cells (SDSC) and Block Copolymer Solar Cells (BCSC); both types being nanostructured bulk heterojunction devices. The successful concept of Donor-antenna dyes in SDSC should be extended to highly absorbing donor antenna groups in order to improve the light harvesting. Furthermore, the influence of liquid crystalline materials on charge transport and the degradation phenomena in SDSC should be studied systematically. In the case of BCSC the vertical alignment of the nanostructures and the introduction of conjugated segments are of utmost importance to improve the solar cell performance. A newly established Lab for Solar Energy Research in which all the methods for preparation and characterisation of solar cells under inert gas facilitates the realisation of the project goals.
Ideal morphology of the active layer in block copolymer solar cell. The domain size (d) should match the exciton diffusion length (LD), so that all the generated excitons can reach the interface and undergo charge separation

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