Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 59: Plasmonics and Nanooptics

O 59.28: Poster

Tuesday, March 21, 2017, 18:30–20:30, P2-OG1

Constructing core/shell nanostructures with optimal structure and composition could maximize the solar light utilization. — •Max Sommerfeld, Rui Xu, and Yong Lei — TU Ilmenau, Ilmenau, Deutschland

Here, using an Au nanocone array as a substrate, a well-defined regular array of SnO2/TiO2 core/shell nanocones with uniformly dispersed Au nanoparticles (SnO2/TiO2/Au NCA) is successfully realized through atomic layer deposition, physical vapor deposition and annealing processes. By tuning the structural and compositional parameters, the advantages of light trapping and short carrier diffusion from the core/shell nanocone array, as well as the surface plasmon resonance and catalytic effects from the Au nanoparticles can be maximally utilized. Accordingly, a remarkable photoelectrochemical (PEC) performance can be acquired. The photocurrent density of the SnO2/TiO2/Au NCA electrode is four times that of a flat SnO2/TiO2 electrode at 1.23 V versus reversible hydrogen electrode (RHE) under simulated sunlight illumination. These results demonstrate a feasible route toward the scalable fabrication of well-modulated core/shell nanostructures and can be easily applied to other metal/semiconductor composites for high-performance PEC.