Novel Photoelectrodes and Noble Metal Free Catalysts for Light Driven Water Electrolysis
In our lab two approaches have been pursued in the last time to realize artificial leaf type structures:
triple junction thin film a-Si/µc-Si solar cells in superstrate geometry with integrated catalysts ,
tandem junction solar cells combined with novel semiconducting ternary metal oxide anodes .
As photoanode materials Fe2WO6 and BiVO4 are under investigation and have been improved with respect to their photovoltage and their photocurrent densities using sol-gel and spray pyrolysis as preparation technique. To lower the costs of the device platinum was replaced by carbon supported MoS2 nanoparticles as hydrogen evolving catalyst. Deposited as a blend with PEDOT:PSS on the backside of the solar cell an SHE of 3.7% was yielded. RuO2 was replaced by manganese and cobalt oxide thin films, respectively.
 Diana Stellmach, Peter Bogdanoff, Onno Gabriel, Bernd Stannowski, Rutger Schlatmann,
Roel van de Krol, Sebastian Fiechter; FORMATEX 2013, 880-886.
 Fatwa F. Abdi, Lihao Han, Arno H.M. Smets, Miro Zeman, Bernard Dam, Roel van de Krol, NATURE COMM. 2013, 4:2195, DOI: 10.1038/ncomms3195.