Enhanced UV photosensing properties of ZnO nanowires prepared by electrodeposition and atomic layer deposition
Résumé
A new process enabling the synthesis of ZnO and Al-doped ZnO nanowires (NWs)
for photosensing applications is reported. By combining atomic layer deposition (ALD) for
the seed layer preparation and electrodeposition for the NWs growth, high quality ZnO
nanomaterials were prepared and tested as UV sensors. The obtained NWs are grown as
arrays perpendicular to the substrate surface and present diameters between 70 and 130 nm
depending on the Al doping, as seen from scanning electron microscopy (SEM) studies. Their
hexagonal microstructure has been determined using X-ray diffraction and Raman
spectroscopy. An excellent performance in UV sensing has been observed for the ZnO NWs 2
with low Al doping, and a maximal photoresponse current of 11.1 mA has been measured. In
addition, initial studies on the stability have shown that the NWs photoresponse currents are
stable, even after 10 UV on/off cycles.
Domaines
Chimie
Fichier principal
Journal of Solid State Electrochemistry, 2017, 21, 2877–2886.pdf (1.31 Mo)
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