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dc.contributor.authorSupab Choopunen_US
dc.contributor.authorAuttasit Tubtimtaeen_US
dc.contributor.authorTheerapong Santhaveesuken_US
dc.contributor.authorSanpet Nilphaien_US
dc.contributor.authorEkasiddh Wongraten_US
dc.contributor.authorNiyom Hongsithen_US
dc.description.abstractZnO nanostructures were prepared by thermal oxidation technique for applying as ethanol sensors and dye-sensitized solar cells. To improve sensitivity of the sensor based on ZnO nanostructures, gold doping was performed in ZnO nanostructures. Gold-doped with 0%, 5%, and 10% by weight were investigated. The improvement of sensor sensitivity toward ethanol due to gold doping was observed at entire operating temperature and ethanol concentration. The sensitivity up to 145 was obtained for 10% Au-doped ZnO sensor. This can be explained by an increase of the quantity of oxygen ion due to catalytic effect of gold. Also, it was found that oxygen ion species at the surface of the Au-doped ZnO sensor remained O2- as pure ZnO sensor. For dye-sensitized solar cell application, the dye-sensitized solar cell structure based on ZnO as a photoelectrode was FTO/ZnO/Eosin-Y/electrolyte/Pt counter electrode. ZnO with different morphologies of nanobelt, nano-tetrapod, and powder were investigated. It was found that DSSCs with ZnO powder showed higher photocurrent, photovoltage and overall energy conversion efficiencies than that of ZnO nanobelt and ZnO nano-tetrapod. The best results of DSSCs were the short circuit current (Jsc) of 1.25 mA/cm2, the open circuit voltage (Voc) of 0.45 V, the fill factor (FF) of 0.65 and the overall energy conversion efficiency (η) of 0.68%. © 2009 Elsevier B.V. All rights reserved.en_US
dc.subjectMaterials Scienceen_US
dc.titleZinc oxide nanostructures for applications as ethanol sensors and dye-sensitized solar cellsen_US
article.title.sourcetitleApplied Surface Scienceen_US
article.volume256en_US Mai Universityen_US
Appears in Collections:CMUL: Journal Articles

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