无机固态基质中碳量子点调控稀土离子发光及其在白光LED中的应用研究

本项目以白光LED器件为应用背景，在无机固态基质中植入高效发光碳量子点和掺杂稀土离子，研制高性能无机固态单色/多色/单基质白光碳量子点发光材料，以应对当前碳量子点发光面临的固态猝灭、发光机理不明确和波长调控等问题。研究内容如下：1）选择合适的无机固态基质材料，通过溶胶-凝胶法在无机固态基质材料中植入高效发光碳量子点，研究碳量子点发光性能和发光机理，探索在无机固态基质材料中植入高效发光碳量子点条件和因素；2）将稀土离子引入无机固态碳量子点高效发光的材料体系，研究无机固态基质材料中碳量子点与稀土离子间能量传递、相互作用、发光性能和发光机理，探索碳量子点敏化稀土离子可调控发光，实现发光颜色多元化；（3）探索所制备的无机固态单色/多色/单基质白光碳量子点发光材料在白光LED器件中的应用。

Taking white light LED device as an application background, the project is going to explore a new kind of inorganic solid carbon quantum dots phosphors with single/multiple color/white light by implanting carbon quantum dots and doping rare earth ions in inorganic solid matrix. The project is try to find out the solutions to the confronting problems related to carbon quantum dots, such as self-quenching in solid states and wavelength tunable. The specific research content is shown as follows: Firstly, we will implant carbon quantum dots with high efficient luminescence in some inorganic solid matrix by a kind of sol-gel process. The luminescent properties of carbon quantum dots in inorganic solid matrix, as well as its luminescent mechanism will be investigated in more detail, and we will try to find out the essential conditions and elements on how to implant carbon quantum dots in inorganic solid matrix with high luminescent efficiency. Secondly, the rare earth ions will be introduced in above inorganic solid matrix implanted with carbon quantum dot. The luminescence properties of the doping rare earth ions, the energy transfer from carbon quantum dot to doping rare earth ions, and the interactions between carbon quantum dots and the doping rare earth ions, as well as the luminescence mechanism will be investigated in more detail in this project. We will explore the tunable luminescence of rare earth ions sensitized by carbon quantum dot and achieve multiple-color luminescence in above inorganic solid matrix. Finally, we will test and optimize the obtained inorganic solid carbon quantum dots phosphors with single/multiple color/white light for the application in white light LED devices.