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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Solution-Based Synthesis of a CdS Nanoparticle/ZnO Nanowire Heterostructure Array

Cited 90 times inthomson ciCited 91 times inthomson ci
Title
Solution-Based Synthesis of a CdS Nanoparticle/ZnO Nanowire Heterostructure Array
Other Titles
Solution-Based Synthesis of a CdS Nanoparticle/ZnO Nanowire Heterostructure Array
Author
Tak, YoungjoHong, Suk JoonLee, Jae SungYong, Kijung
Keywords
ONE-DIMENSIONAL NANOSTRUCTURES; SENSITIZED SOLAR-CELLS; ZINC-OXIDE NANOWIRES; ZNO NANOROD ARRAY; PHOTOCATALYTIC ACTIVITY; PHOTOVOLTAIC DEVICES; VAPOR TRANSPORT; GROWTH; ELECTRODEPOSITION; NANOCRYSTALS
Issue Date
2009-06
Publisher
AMER CHEMICAL SOC
Citation
CRYSTAL GROWTH & DESIGN, v.9, no.6, pp.2627 - 2632
Abstract
CdS nanoparticle (NP)/ZnO nanowire (NW) heterostructure arrays were fabricated by a two-step chemical solution deposition method. First, vertically aligned ZnO nanowire arrays were grown on a substrate from Zn(NO(3))(2) (10 mM) and an aqueous ammonia (pH similar to 11) solution at 95 degrees C for 6 h. Then, CdS nanoparticles were deposited on the ZnO nanowire array in a chemical bath containing CdSO(4), thiourea, and an aqueous ammonia solution (molar ratio of 1:5:500) at 60 degrees C. The effects of deposition reaction conditions, such as solution concentrations and deposition time, were investigated. Synthesized US NP/ZnO NW heterostructures were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM), and their optical absorption property was measured by light absorbance spectrometry. As the solution concentrations and deposition time increased, the sizes and density of CdS nanoparticles on the surfaces of ZnO nanowires increased and the visible-light absorption capability was improved. The CdS NP/ZnO NW heterostructure arrays presented here offer promising applications in solar-energy converting devices. The photoelectrochemical cells using CdS NP/ZnO NW heterostructure arrays as photoelectrodes showed enhanced photocurrent characteristics compared with the photoelectrode cell of a bare ZnO nanowire array
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DOI
10.1021/cg801076b
ISSN
1528-7483
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ECHE_Journal Papers
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