【作者】 李志远；

【导师】 陆红波；

【作者基本信息】 合肥工业大学 ， 材料工程（专业学位）， 2019， 硕士

【摘要】 近年来,紫外探测技术被广泛应用于指纹识别,物质分析,紫外通信,高压电晕情况分析以及自然灾害预报等众多领域。AlGaN和SiC材料制备的新型宽禁带紫外半导体成像器件虽然有着良好的性能,但是因为材料质量、器件制备工艺等技术条件的局限,短期内很难得以大范围的应用。利用硅基光电探测器件进行工艺改进来实现深紫外光探测成为一种有效途径。其中以镀制紫外增强膜进行工艺改进的方法很好地满足了现有条件下器件制备的难易程度、成本考量、增强效果等综合要求。常用的紫外镀膜材料为有机分子Lumogen,该材料虽然有着较好的荧光性能,但是存在着有机材料稳定性差、无法窄波段紫外探测、成膜方式单一且工艺复杂等诸多限制。因此,制备出能够实现窄波段紫外探测、稳定性良好、成膜工艺简单且增强效果明显的新型紫外增强材料显得十分必要。稀土配合物作为一类发光性能优异的荧光材料,且能够通过改变有机配体结构实现不同紫外波段的吸收,进行达到荧光可调的效果。本文将中心发光单元Eu³⁺优异的荧光性能与苯甲酸类、噻吩甲酰三氟丙酮类有机配体的可调性进行结合利用,成功地制备出了新型的高效可调的紫外增强材料及薄膜。但是,在光、热稳定性的表征测试中发现,稀土配合物材料虽然荧光性能优异,但是稳定性较差。为了解决这一问题实现更好的紫外增强效果,我们引入了稳定性更好的氧化石墨烯与稀土配合物进行氢键复合。实验结果表明,氧化石墨烯的引入不仅能够保持稀土配合物紫外增强材料高效可调的荧光性能,还能有效提高其光、热稳定性能,实现高效稳定可调的紫外增强性能。为了得到更高性能的PVA复合紫外增强薄膜,我们从PVA含量、荧光材料含量、薄膜厚度三方面进行性能优化,得出了PVA复合紫外增强薄膜制备的最优配比。将最优配比应用于紫外增强器件制备中,成功制备出性能良好的紫外增强CCD。由测试数据可知其在紫外增强性能、可调探测性能、响应度三方面均有较好的测试结果。此外,该制备工艺简单高效,并且具备向面阵紫外探测领域拓展的能力。更多还原

【Abstract】 In recent years,UV detection technology has been widely used in fingerprint identification,material analysis,ultraviolet communication,high-voltage corona analysis and natural disaster prediction（e.g.monitoring of cumulonimbus clouds and forest fires）,and many other fields.Although the new wide-bandgap UV semiconductor imaging devices prepared by AlGaN and SiC materials have good performance,due to the limitations of technical conditions such as domestic material quality and device preparation process,it is difficult to be widely applied in a short period of time.The use of silicon-based photodetector devices for process improvement to achieve deep ultraviolet light detection has become an effective way.Among them,the process improvement method of plating the ultraviolet reinforced film can well satisfies the comprehensive requirements of the ease of preparation,cost consideration and enhancement effect of the device under the current conditions.The commonly used ultraviolet coating material is organic molecule,Lumogen.Although the material has good fluorescence performance,it has many limitations such as poor stability of organic materials,inability to detect ultraviolet light in a narrow band,single film formation method,and complicated process.Therefore,it is necessary to prepare a novel ultraviolet reinforced material capable of achieving narrow-band ultraviolet detection,good stability,simple film formation process and obvious enhancement effect.As a kind of fluorescent material with excellent luminescence properties,rare earth complexes can realize absorption in different ultraviolet bands by changing the structure of organic ligand,thus achieving the effect of adjustable fluorescence.In this paper,the excellent fluorescence performance of the central light-emitting unit Eu³⁺was combined with the adjustability of benzoic acid and thiophene trifluoroacetone organic ligands,and a new type of highly efficient and adjustable UV-enhanced material and film was successfully prepared.However,in the characterization test of light and thermal stability,it was found that the rare earth complex material has excellent fluorescence performance but poor stability.In order to solve this problem and achieve better UV enhancement,we introduced a more stable graphene oxide and a rare earth complex for hydrogen bonding.The experimental results show that the introduction of graphene oxide can not only maintain the high-efficiency fluorescence performance of the rare earth complex UV-enhanced material,but also effectively improve its light and thermal stability,and achieve high-efficiency and stable UV-enhancing properties.更多还原