期刊
SMALL
卷 10, 期 19, 页码 3970-3978出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201400970
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资金
- UK Engineering and Physical Science Research Council [EP/H00338X/2, EP/G060649/1]
- European Community [310184]
- Minstry of Science and Technology of Taiwan [MOST 102-2218-E-006-014-MY2]
- Christian Doppler Research Association (Austrian Federal Ministry of Economy, Family and Youth)
- Christian Doppler Research Association (National Foundation for Research, Technology and Development)
- OMV Group
- Marie Curie Intra-European Fellowship [FP7-PEOPLE-2011-IEF 298012]
- ERC [ERC LINASS 320503]
- EPSRC [EP/H00338X/2, EP/G060649/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060649/1] Funding Source: researchfish
Photo-electrochemical water splitting is a very promising and environmentally friendly route for the conversion of solar energy into hydrogen. However, the solar-to-H-2 conversion efficiency is still very low due to rapid bulk recombination of charge carriers. Here, a photonic nano-architecture is developed to improve charge carrier generation and separation by manipulating and confining light absorption in a visible-light-active photoanode constructed from BiVO4 photonic crystal and plasmonic nanostructures. Synergistic effects of photonic crystal stop bands and plasmonic absorption are observed to operate in this photonic nanostructure. Within the scaffold of an inverse opal photonic crystal, the surface plasmon resonance is significantly enhanced by the photonic Bragg resonance. Nanophotonic photoanodes show AM 1.5 photocurrent densities of 3.1 +/- 0.1 mA cm(-2) at 1.23 V versus RHE, which is among the highest for oxide-based photoanodes and over 4 times higher than the unstructured planar photoanode.
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