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  • Title: Wire-supported CdSe nanowire array photoelectrochemical solar cells.
    Author: Zhang L, Shi E, Li Z, Li P, Jia Y, Ji C, Wei J, Wang K, Zhu H, Wu D, Cao A.
    Journal: Phys Chem Chem Phys; 2012 Mar 14; 14(10):3583-8. PubMed ID: 22311153.
    Abstract:
    Previous fiber-shaped solar cells are based on polymeric materials or dye-sensitized wide band-gap oxides. Here, we show that efficient fiber solar cells can be made from semiconducting nanostructures (e.g. CdSe) with smaller band-gap as the light absorption material. We directly grow a vertical array of CdSe nanowires uniformly around a core metal wire and make the device by covering the top of nanowires with a carbon nanotube (CNT) film as the porous transparent electrode. The CdSe-CNT fiber solar cells show power conversion efficiencies of 1-2% under AM 1.5 illumination after the nanowires are infiltrated with redox electrolyte. We do not use a secondary metal wire (e.g. Pt) as in conventional fiber-shaped devices, instead, the end part of the CNT film is condensed into a conductive yarn to serve as the secondary electrode. In addition, our CdSe nanowire-based photoelectrochemical fiber solar cells maintain good flexibility and stable performance upon rotation and bending to large angles.
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