New TiO₂ double layer nano particulate photo anode for highly efficient dye sensitized solar cells (DSSC)

In this work, a new process chain for the realization of high performance dye sensitized solar cells (DSSC) will be introduced. The photo anode consists of two titania layers, the first layer facing the FTO/glass substrate is fabricated by spin coating using a commercial titania (P25), the second one is deposited by gas phase synthesis. Different synthesis parameters, optional post treatments, two different sensitizers and three different electrolyte mixtures have been systematically varied to optimize the photovoltaic conversion properties. A good efficiency value around 9.1% could be realized after comprehensive process evaluation.