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HL: Fachverband Halbleiterphysik

HL 44: Poster Session I

HL 44.30: Poster

Dienstag, 15. März 2011, 18:00–21:00, P3

In_xGa_1−xN films for use in photo-electrochemical cells — •Y.H. Wu^1,2, Philipp R. Ganz^1,2, D.Z. Hu^1,2, and Daniel M. Schaadt^1,2 — ¹Institut für Angewandte Physik, Karlsruher Institute of Technology, 76131 Karlsruhe, Germany — ²DFG-Center for Functional Nanostructures, Karlsruher Institute of Technology, 76131 Karlsruhe, Germany

Development of renewable and clean energy is becoming interesting. Photo-electrochemical cells (PECs) are a new and promising possibility of generating hydrogen by splitting water. A PEC consists of a semiconductor electrode and a metal counter electrode and is embedded in an electrolyte or water. A possible material for the semiconductor electrode is In_xGa_1−xN , because it has an appropriate band-edge potentials, which straddles the redox potentials of water. We have characterized In_xGa_1−xN films for use in PECs. The carrier concentrations were investigated by Hall measurement and the surface morphology by atomic force microscopy. The films were exposed to various electrolytes with different PH levels and their potential for hydrogen generation was explored.