Role of oxygen vacancy in tuning of optical, electrical and NO2 sensing properties of ZnO1-x coatings at room temperature
Role of oxygen vacancy in tuning of optical, electrical and NO2 sensing properties of ZnO1-x coatings at room temperature
复制标题
氧空位在室温下 ZnO1-x 涂层光学、电学和 NO2 传感性能调节中的作用
DOI：
10.1016/j.snb.2017.01.105
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发表时间：
2017-09
期刊：
影响因子：
--
通讯作者：
Lu Pengfei
中科院分区：
文献类型：
--
作者：
Zhang Chao;Geng Xin;Li Jiawei;Luo Yifan;Lu Pengfei
通过在过氧化氢溶液中浸渍1、10、60和120 min（简称Vo-1、Vo-10、Vo-60和Vo-120样品）并添加后续退火来调节ZnO 1-x涂层的氧空位浓度。采用XRD、拉曼、PL和XPS等测试手段分析了涂层中氧空位浓度的变化。Vo-1、Vo-10、Vo-60和Vo-120样品的氧空位浓度分别为1.9%、3.7%、4.8%和4.3%。光学和电学测试表明，随着氧空位浓度的增加，薄膜的可见光吸收范围扩大，电阻降低。Vo-60样品具有最宽范围的可见光响应。采用第一性原理计算和各种实验表征方法研究了氧空位对薄膜带隙的影响，结果表明，随着氧空位的增加，薄膜带隙变窄。该传感器在室温下对0.9ppm的NO2有明显的敏感响应。具有最高氧空位浓度的涂层具有最好的NO2气敏性能。此外，VO-60涂层对NO2具有良好的选择性和稳定性。
Oxygen vacancy concentration of ZnO1-xcoatings were regulated by dipping the coatings into hydrogen peroxide solution for 1, 10, 60 and 120 min (abbreviated as Vo-1, Vo-10, Vo-60 and Vo-120 samples) with an addition of subsequent annealing. XRD, Raman, PL and XPS characterizations were used to determine the evolution of oxygen vacancy concentration in the treated coatings. The oxygen vacancy concentration for Vo-1, Vo-10, Vo-60 and Vo-120 samples was 1.9%, 3.7%, 4.8% and 4.3%, respectively. Optical and electrical measurement showed that the visible light absorption range was extended and electrical resistance decreased when the oxygen vacancy concentration was increased. The Vo-60 samples possessed the widest range of visible light response. First principle calculation and various experimental characterizations were used to study the role of the oxygen vacancy in bandgap of the coatings and the results showed that the bandgap was narrowed when the oxygen vacancy was increased. The sensors exhibited significant sensing responses to 0.9 ppm NO2at room temperature. The coatings with the highest oxygen vacancy concentration had the best NO2gas sensing properties. In addition, the Vo-60 coatings showed good selectivity and stability to NO2.
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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