Development of plasmonic-semiconductor nano-assemblies for solar water splitting systems: more efficient and more cost effective

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With unique surface plasmon resonance (SPR), plasmonic nanostructures are offering new ways to address many pressing issues in energy and environment sectors. As compared to noble metals of Au and Ag, the synthesis, SPR properties and applications of Cu-based plasmonic nanostructures have received significantly less attention. It is largely due to the easy oxidation of Cu. Nevertheless, Cu is earth abundant and much cheaper, so in the long term it is more sustainable and attractive. ** The conversion of solar energy into H2, which can serve as a clean fuel for zero-emission vehicles, by water splitting represents a very promising avenue for meeting our urgent energy demand without adverse environmental impacts. As compared to solar-to-electricity conversion (by solar cells), it has advantages of easy transport and distribution. Although much progress has been done recently, commercial applications of solar water splitting remain scarce. Low conversion efficiency under sunlight has been a major obstacle, which is largely due to limited absorption of involved semiconductor materials. ** This proposal aims to develop stable, earth abundant Cu-based plasmonic nanostructures, to investigate in depth their plasmonic properties and to push forward their applications in plasmon enhanced H2 generation by rationally forming new plasmon-semiconductor assemblies to maximize the potential beneficial effects of plasmons in extending and strengthening light absorption of semiconductors. ** This project will be carried out in collaboration with Canadian Solar Solutions Inc., a world's leading solar cell company. The proposed innovative approach will open up new opportunities for it in the fields of nanotechnology and solar fuel and also hold high potential to lead to breakthroughs in green energy. In addition to leading to possible technology transfer, the project will greatly contribute to the training of HQP (3 PhDs & 2 PDFs), who will acquire multidisciplinary expertise (in nanomaterials, plasmonics, green energy, etc.) that is in high demand in industry and academia. ****