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HL: Fachverband Halbleiterphysik

HL 53: Energy materials (other than photovoltaics)

HL 53.4: Vortrag

Freitag, 16. März 2018, 10:15–10:30, EW 202

Template-based nanoengineering strategies for photoelectrodes design toward enhancing photoelectrochemical water splitting — •Huaping Zhao, Rui Xu, Yan Mi, Long Liu, Yaoguo Fang, and Yong Lei — Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, Germany

Solar-driven hydrogen production through photoelectrochemical (PEC) water splitting is considered as one of the most highly-efficient approaches to utilize the unlimited solar energy economically and environmentally. The architecture of photoelectrode plays an important role in determining the overall PEC performance. As known that nanostructures have the significant capability of decoupling light absorption and charge carrier collection, and shortening minority carrier diffusion distance compared to bulk structures, various nanoengineering strategies therefore have been developed for the rational photoelectrode design aiming at improving the PEC energy conversion efficiency. Remarkably, template-based nanoengineering strategies provide the opportunities to rationally design nanoarchitectured photoelectrodes. Studies have shown the fact that template-realized highly-ordered nanostructure arrays can spatially redistribute the light intensity and efficiently scatter light in the device resulting in enhanced light absorption, and thus will enable high quantum efficiencies for solar energy conversion. Moreover, such nanostructure arrays could facilitate carrier collection via orthogonalizing the direction of light propagation and carrier collection, resulting in significantly improved PEC performance.