Enhancement of the photoelectrochemical properties of Cl-doped ZnO nanowires by tuning their coaxial doping profile

Arrays of vertically aligned ZnO:Cl/ZnO core-shell nanowires were used to demonstrate that the control of the coaxial doping profile in homojunction nanostructures can improve their surface charge carrier transfer while conserving potentially excellent transport properties. It is experimentally show...

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Bibliographic Details
Published in:Applied physics letters 2011-12, Vol.99 (26), p.262102-262102-4
Main Authors: Fan, Jiandong, Güell, Frank, Fábrega, Cristian, Shavel, Alexey, Carrete, Alex, Andreu, Teresa, Ramón Morante, Joan, Cabot, Andreu
Format: Article
Language:English
Subjects:
Luminescence
Luminescència
Nanoestructures
Nanostructures
Nanotubes
Nanotubs
Pel·lícules fines
Thin films
Zinc oxide
Òxid de zinc
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Summary:Arrays of vertically aligned ZnO:Cl/ZnO core-shell nanowires were used to demonstrate that the control of the coaxial doping profile in homojunction nanostructures can improve their surface charge carrier transfer while conserving potentially excellent transport properties. It is experimentally shown that the presence of a ZnO shell enhances the photoelectrochemical properties of ZnO:Cl nanowires up to a factor 5. Likewise, the ZnO shell promotes the visible photoluminescence band in highly conducting ZnO:Cl nanowires. These lines of evidence are associated with the increase of the nanowires' surface depletion layer.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3673287