基于共轭聚合物的近红外光传感器

发布时间：2018-06-18 08:04

本文选题：光热转换 + 共轭聚合物　；参考：《化学通报》2017年02期

【摘要】：近红外光(NIR)传感器在军事警戒、空间勘探、科研检测、医疗诊断等领域有着极为重要的应用价值。传统的NIR传感材料主要是基于半金属的无机材料,借助窄带隙来吸收低能量的NIR而改变材料自身的电导率,继而实现检测。无机传感材料由于加工繁琐、不具备柔性、成本高昂以及难降解等因素致其进一步发展受到限制。新兴的共轭聚合物材料通过光热转换或者能级可调的光电效应实现对NIR的高灵敏传感,同时能够实现快速响应。该类聚合物材料具有π电子离域的共轭结构,同样具有较窄的带隙,在NIR照射下能够通过自身电导率的改变或光热转换作用将热量传递至其他超热敏材料来实现对光的检测。借助柔性、环境友好、制备简单、便于掺杂、灵敏度高等优势,共轭聚合物材料为新一代NIR传感器的应用与普及开辟了新的前景。
[Abstract]:NIR sensors are of great value in the fields of military alert, space exploration, scientific research, medical diagnosis and so on. The traditional NIR sensing materials are mainly based on semi-metallic inorganic materials. The conductivity of NIR is changed by using narrow band gap to absorb low energy NIR, and then the detection is realized. The further development of inorganic sensing materials is limited due to complicated processing, lack of flexibility, high cost and difficult to degrade. The newly developed conjugated polymer materials can realize high sensitivity sensing to NIR by photothermal conversion or optoelectric effect with adjustable energy level, and can realize fast response at the same time. This kind of polymer material has 蟺 electron delocalized conjugate structure and narrow band gap. Under NIR irradiation, the heat can be transferred to other hypersensitive materials by the change of its own conductivity or photothermal transfer to other hypersensitive materials to realize the detection of light. With the advantages of flexibility, environmental friendliness, simple preparation, easy doping and high sensitivity, conjugated polymer materials have opened up a new prospect for the application and popularization of the new generation of NIR sensors.
【作者单位】：中国人民大学化学系;
【基金】：国家自然科学基金项目(51373197,21422407,21674127)资助
【分类号】：TP212

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