Cd掺杂ZnO薄膜甲醛敏感特性研究

发布时间：2018-02-22 07:43

  本文关键词： ZnO薄膜 紫外线激励 掺杂Cd 溶胶凝胶　出处：《黑龙江大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前,甲醛气体无时无刻不在影响人们的生活和健康,所以对甲醛的测量越来越被人们所研究,甲醛的检测方法在生活中的方方面面被使用。在对甲醛检测的研究中,可以利用气敏材料的敏感特性来检测甲醛的浓度和对人们危害系数,在气敏材料的研究中,人们已经不仅只提升其对气体的选择性和传统敏感特性,还希望能够改善高的工作温度对气敏材料的制约,也就是说,研制出一种在室温下就能工作的气敏材料。在对气敏材料的研究中,掺杂可以提高气敏材料的敏感特性。因此,在本论文中,我们研究了一种在紫外光照下的气敏材料,并对该气敏材料进行掺杂,也就是说,对ZnO气敏材料掺杂Cd,掺杂后的ZnO敏感薄膜就可以工作在常温状态下,不需要添加加热电极。在这里我们选取波长为370nm的紫外线作为激励源,使用溶胶凝胶法制备ZnO薄膜和掺杂Cd的ZnO薄膜。通过控制紫外线照射强度,测量Cd不同掺杂浓度的ZnO敏感薄膜的灵敏度,从而选择最佳掺杂比例。后测量其选择性、重复性和响应时间等。通过我们的论文可以得到这样的结论,当掺杂Cd的ZnO薄膜是一种有前景的敏感膜,紫外线照射强度为1.53mW/cm2得出掺杂为2.6%的时候,灵敏度最好。
[Abstract]:At present, the formaldehyde gas in every hour and moment affects people's life and health, so the measurement of formaldehyde more and more people study, detection methods of formaldehyde in all aspects of life are used. In the study on Determination of formaldehyde in sensitive features can use gas sensing material to detect the concentration of formaldehyde and harm the coefficient on people in the study of gas sensitive materials, people have not only to enhance the selectivity and sensitivity of the traditional gas, also hope to be able to improve the high temperature control of gas sensitive materials, that is, to develop a gas sensitive material can work at room temperature. In the study of gas sensitive materials, doping can improve the sensitivity of gas sensitive materials. Therefore, in this thesis, we study a kind of gas sensitive materials under UV irradiation, and doping on the gas sensing material, that is to say, the ZnO gas sensitive material The material doped Cd, ZnO doped film can work at room temperature, do not need to add the heating electrode. Here we selected wavelength of 370nm ultraviolet as excitation source, ZnO thin film and Cd doped ZnO thin films prepared by sol-gel method. By controlling the UV irradiation intensity, sensitivity of ZnO sensitive film measurement Cd different doping concentration, so as to choose the optimal doping ratio. After measuring the selectivity, repeatability and response time. Through our paper can get such a conclusion, when the ZnO doped Cd film is a kind of sensitive membrane potential, intensity of ultraviolet radiation is 1.53mW/cm2 that doping is 2.6%, sensitivity is best.

【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ132.41;TB383.2
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本文编号：1523890