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Title: Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles
Authors: Feng, Jianyong
Zhao, Xin
Ma, Su Su Khine
Wang, Danping
Chen, Zhong
Huang, Yizhong
Keywords: Cadmium selenide
Bismuth vanadate
Issue Date: 2016
Source: Feng, J., Zhao, X., Ma, S. S. K., Wang, D., Chen, Z., & Huang, Y. (2016). Fast and Simple Construction of Efficient Solar-Water-Splitting Electrodes with Micrometer-Sized Light-Absorbing Precursor Particles. Advanced Materials Technologies,1(8), 1600119-.
Series/Report no.: Advanced Materials Technologies
Abstract: Micrometer-sized light-absorbing semiconductor particles (usually prepared by high temperature synthetic techniques) hold the desirable merits of high crystallinity, low concentrations of bulk defects, and a decreased grain boundary density to reduce bulk recombination of photocarriers. However, solar-water-splitting electrodes assembled using them as precursors always produce very low photocurrents. This could be due to the lack of an effective fabrication and/or modification protocol applicable to assemble these micrometer-sized semiconductor particles into suitable electrode configurations. A fast and simple fabrication scheme of drop-casting followed by the necking treatment is developed to enable the micrometer-sized precursor particles derived photoelectrodes to deliver appreciable photocurrent densities (>1 mA cm−2). By applying this fabrication scheme, photoelectrodes of solid-state reaction derived Mo doped BiVO4 (≈4 μm, modified with oxygen evolution catalysts) and commercial WO3 (size ranging from 100 nm to >10 μm) have yielded photocurrent densities higher than 1 mA cm−2, while the photoelectrode composed of commercial CdSe (≈10 μm) is able to produce a photocurrent density higher than 5 mA cm−2 (in a Na2S aqueous solution). This strategy provides a new possible way, in addition to the predominant route of nanostructuring, to construct efficient solar-water-splitting electrodes.
DOI: 10.1002/admt.201600119
Schools: School of Materials Science & Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Advanced Materials Technologies, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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