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光激发改变半导体载流子的浓度是气敏传感器研究的一个重要方向。目前研究主要采用的光谱为紫外光,最为常见的可见光却没有得到应用。通过溶胶-凝胶法制备出WO3纳米粉末与CH_3NH_3PbI3钙钛矿前驱液,并利用二者制备得到对可见光敏感的气敏传感器,得出其在还原性气体NH3中的气敏特性。通过扫描电子显微镜(SEM)、X射线衍射仪(XRD)以及紫外光可见光光分度计对WO3纳米粉末和CH_3NH_3PbI3钙钛矿进行表征,利用自制的动态配气装置对器件的气敏特性进行测试,得出该新型气敏传感器在NH3中的灵敏度相比纯的WO3气敏传感器的灵敏度有所提高,并且这种传感器还具有较好的光敏特性,表明其具有潜在应用前景。
Abstract：It is an important research direction of gas sensors that the light stimulates the change of the semiconductor carrier concentration.At present,the spectrum of the ultraviolet light is mainly adopted in the research,while the common visible light is not applied.The WO3 nanopowder and CH_3NH_3PbI3 perovskite precursor solution were fabricated through the sol-gel method in this experiment,agas sensor sensitive to the visible light was obtained with the WO3 nanopowder and CH_3NH_3PbI3 perovskite precursor solution,and the gas sensitive characteristics of the device in reducing gas NH3 were achieved.The WO3 nanopowder and CH_3NH_3PbI3 perovskite were charac-terized by the scanning electron microscope(SEM),X-ray diffractometer(XRD)and ultraviolet-visible light spectrophotometer,and the gas-sensing characteristics of the device were tested with the self-made dynamic distributing equipment.The results show that the novel gas sensor is more sensitive than the pure WO3 gas sensor in NH3.Besides,the gas sensor is of good photosensitivity,indicating the potential application prospect of the gas sensor.
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基本信息:
DOI：10.13250/j.cnki.wndz.2017.02.006
中图分类号:TP212;TN304
引用信息:
[1]金慧娇,李彦,曾艳,等.WO_3与CH_3NH_3PbI_3钙钛矿制备的敏感器件的敏感特性[J].微纳电子技术,2017,54(02):101-106.DOI:10.13250/j.cnki.wndz.2017.02.006.
基金信息:
中国博士后科学基金资助项目(2015M581282);; 河北省留学人员择优资助项目(C2015003040);; 天津市自然科学基金面上资助项目(15JCYBJC52100);; 河北省自然科学基金青年项目(F2016202214)
2017-02-15
2017-02-15