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HL: Fachverband Halbleiterphysik

HL 81: Poster: Energy materials incl. photovoltaics

HL 81.2: Poster

Mittwoch, 2. April 2014, 17:00–20:00, P1

3D nano-architectures for next generation solar water splitting devices — •Stefan Bösemann, Liaoyong Wen, Yang Xu, Min Zhou, and Zhibing Zhan — Ilmenau University of Technology, Institute of Physics & IMN MacroNano (ZIK), Prof. Schmidt-Str. 26, 98693 Ilmenau (Germany)

Solar energy is one of the major forms of renewable energy. Various solar water splitting concepts have been regarded as a feasible and cost-effective realization of an artificial analogy to photosynthesis. Unfortunately, the stringent requirements for the physical and chemical properties make it difficult to find suitable photoelectrodes able to perform solar energy conversion efficiently and inexpensively. Devices built from 3D ordered nano-architectures offer a number of advantages over those based on thin film technology, such as larger surface and reaction area to collect more sunlight and to improve the efficiency of solar water splitting. Innovations in 3D nano-architectured photoelectrodes offer potential breakthroughs in this field by taking the advantages correspondingly physical processes. Herein, with the assistance of various fabrication techniques and different templates, including anodic aluminum oxide (AAO) and polystyrene colloidal templates, photoelectrodes with different 3D structures have been achieved and applied in solar water splitting. For example, we have constructed 3D quaternary macro-mesoporous architectures, which showed improved solar energy conversion efficiency. Meanwhile, we also realized a tandem structure, which facilitate the hydrogen and the oxygen evolution at the same time in one single device.