双波长荧光发射量子点复合体系的构建及温度传感应用

项目名称： 双波长荧光发射量子点复合体系的构建及温度传感应用

项目编号： No.51472053

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 曾若生

作者单位： 桂林电子科技大学

项目金额： 80万元

中文摘要： 发光量子点在许多特殊工业环境的温度监测中具有重要的应用价值。本项目旨在运用能带工程理论，科学地设计具有双波长荧光发射性质的量子点复合体系，并将其应用于可视化温度传感的研究。通过柔性的化学方法，合成晶核/界面层/表面层（量子阱/势垒层/量子阱）复合结构量子点，调控界面势垒层的高度和厚度，改变晶核与表面层之间的电子耦合程度，实现量子点双波长荧光发射，着重研究界面势垒层及其能级结构对复合结构量子点发光性质的影响。利用本征半导体量子点和掺杂量子点的荧光热敏性差异，通过比率荧光信号输出和颜色的改变，实现超灵敏、高精度和可视化温度传感。上述关键科学问题的研究，将为实现量子点的实用化作出贡献。

中文关键词： 双波长荧光发射；量子点；复合体系；光学性质；温度传感

英文摘要： Light-emitting quantum dots (QDs) have important applications in many special temperature monitoring of industrial environments. Based on bandgap engineering theory, the project aims to scientifically design composite system of QDs with dual-wavelength fluorescence emission, which can be applied in temperature sensor., The nucleus/interface layer/surface layer (quantum well/ barrier layer/quantum well) composite structure QDs can be synthesized by flexible chemical methods. Through regulation of the height and thickness of the interface barrier layer and electronic coupling degree between the nucleus and the surface layer, dual-wavelength fluorescence emission of QDs can be achieved. We will focus on the effects of the barrier layer and their energy level structure on the optical properties of the composite QDs. Based on the fluorescence thermosensitive difference of the intrinsic and doped semiconductor QDs, the ultra-sensitive, high-precision and visual temperature sensor can be realized by the signal output of the fluorescence ratio and color change of composite QDs. Researches on these key scientific issues will contribute for the practical realization of QDs.

英文关键词： dual-wavelength fluorescent emission;quantum dots;composite system;optical property;temperature sensor