Zinc oxide nanostructures for applications as ethanol sensors and dye-sensitized solar cells
Zinc oxide nanostructures for applications as ethanol sensors and dye-sensitized solar cells
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DOI：
10.1016/j.apsusc.2009.05.139
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发表时间：
2009-11
影响因子：
6.7
通讯作者：
S. Choopun;A. Tubtimtae;T. Santhaveesuk;S. Nilphai;E. Wongrat;N. Hongsith
中科院分区：
文献类型：
--
作者：
S. Choopun;A. Tubtimtae;T. Santhaveesuk;S. Nilphai;E. Wongrat;N. Hongsith
采用热氧化法制备了氧化锌纳米结构，用于乙醇传感器和染料敏化太阳能电池。为了提高基于ZnO纳米结构的传感器的灵敏度，在ZnO纳米结构中掺杂了金。分别以重量为0%、5%和10%掺杂金。在整个工作温度和乙醇浓度下，由于金的掺杂，传感器对乙醇的灵敏度有所提高。10% au掺杂ZnO传感器的灵敏度可达145。这可以解释为由于金的催化作用，氧离子的数量增加。与纯ZnO传感器相比，au掺杂ZnO传感器表面的氧离子仍然是O2−。对于染料敏化太阳能电池的应用，以ZnO为光电极的染料敏化太阳能电池结构为FTO/ZnO/Eosin-Y/电解质/Pt对电极。研究了不同形貌的ZnO纳米带、纳米四足和纳米粉末。结果表明，与ZnO纳米带和ZnO纳米四足体相比，ZnO纳米带和ZnO纳米四足体的DSSCs具有更高的光电流、光电压和整体能量转换效率。DSSCs的最佳性能为短路电流（Jsc）为1.25mA/cm2，开路电压（Voc）为0.45V，填充系数（FF）为0.65，总能量转换效率（η）为0.68%。
ZnO 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 1.25mA/cm2, the open circuit voltage (Voc) of 0.45V, the fill factor (FF) of 0.65 and the overall energy conversion efficiency (η) of 0.68%.