期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 18, 页码 6474-6479出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta15439d
关键词
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资金
- Center for BioNano Health-Guard
- Ministry of Science, ICT & Future Planning (MSIP) of Korea [H-GUARD_2013M3A6B2078944]
- National Research Foundation of Korea (NRF)
- Ministry of Education [S-2011-0292-000]
Photoelectrochemical cells have existed for decades. However, the poor efficiency of such devices is still problematic because of trade-offs between different materials properties used for photoelectrochemical reactions. Here we report a novel photoanode architecture consisting of CdS/CdSe co-sensitized sea urchin-shaped ZnO/TiO2-based nano/micro hybrid heterostructures that simultaneously offer better light scattering over the entire visible frequency domain, better separation of photo-generated charge carriers, significantly improved light absorption that extends over a broad visible spectrum, and better transport of electrons through a highly connected network of conducting ZnO nanowires than existing architectures. Use of the synthesized structures as photoanodes in a photoelectrochemical cell yielded a photocurrent density as high as 11.8 mA cm (2) with a remarkable photo-conversion efficiency of 6.4%.
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