Dresden 2014 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 1: Application of Thin Films

DS 1.14: Vortrag

Montag, 31. März 2014, 13:00–13:15, CHE 91

Wet-chemical Synthesis of SrTiO₃-Ruddlesden-Popper-Phases for photoelectrochemical Watersplittingg — •Diana Karsch, Doreen Eger, Erik Mehner, Hartmut Stöcker, and Dirk Meyer — TU Freiberg - Institut für experimentelle Physik

The photoinduced watersplitting promises a considerably simplification for the hydrogen production. Therefore the energy of photons, e.g. the sunlight, is used for splitting the water into its molecular components, Oxygen and Hydrogen. This is worked out by irradiation of light with a suitable wavelength to a semiconductor.

Thin films of SrTiO₃-Ruddlesden-Popper-Phases are produced by sol gel synthesis and are characterized due to phase content and morphology. For comparison of phase setup additionally one sample with stoichiometric relations is produced by ion beam implantation in a SrTiO₃ single crystal. The setup of crystalline phases in the film was investigated with in-situ X-ray diffraction.

The samples show delicate, spongy structures on the surface, which are visible by electron scanning microscopy. In addition to the RP-phases all samples have a relevant part of impurity phases. Further photoelectrochemical measurements with sol gel synthesized thin layers have been executed for the first time. The results show that the thin layer working electrodes are suitable for water splitting.