实现量子点的异价掺杂调控，引进额外电子/空穴载流子，实现高效掺杂荧光和n型/p型导电类型控制，是开发量子点在光学、电学以及新能源应用方面的关键科学问题。在其制备基础上，实现其在聚合物(如PMMA)基块体材料的3D打印与荧光聚集等光学性能研究，是量子点器件研究方面的又一科学问题。到目前为止，这两种紧密相连的科学问题都未解决。本项目中，申请人在已有的掺杂半导体纳米异质结构合成及性能研究基础上，因为掺杂的“自清洁”等问题，拟利用配位阳离子交换反应实现低温制备深度位置、异价掺杂II-VI族量子点；在实现有效掺杂引起的导电类型调控、大Stokes位移掺杂发光基础上，进行掺杂量子点表面的配体交换，通过原位聚合实现其在聚合物基块体中的均匀分散和荧光性能调控；通过3D打印成不同块体及超结构，研究包括太阳能荧光聚集性能在内的光学性质，探究宏观超结构的“构效关系”，有望获得全新的3D超结构引起的光传播性质。

Intentional insertion of heterovalent impurity atoms into colloidal quantum dots （CQDs）, to provide either extra electrons (n-type doping) or extra holes(p-type doping) and realize efficient dopant related luminescence is the critical step for the wide application of CQDs in optics, electronics or electro-optic applications. Based on the precise synthesis of doped QDs, the uniform dispersion of them into bulk sized polymer matrix, such as PMMA matrix with well-defined bulk shapes and then 3D superstructures by 3D printing manufacturing, is another important step for their luminescence collection and related devices application. These two scientific problems are not solved synergistically. In this project, based on the doped semiconductor hetero-nanostructures synthesis and properties research experience, because of the “self-purification” problem in QDs, the applicant designs the cation exchange reaction between host metal ions and the doped heterovalent metal chalcogenides nanoparticles. By precise controlling of the chemical thermodynamics and kinetics to realize the deep position heterovalent doping in II-VI CQDs. Intentionally by this low temperature and versatile strategy, it is expected that the large Stokes shifted doped luminescence with high quantum yield, controllable concentration of extra electrons (n-type doping) or extra holes(p-type doping) could be achieved efficiently. Then by in-situ ligand exchange with polymer monomers, such as MMA molecules, to realize the in-situ polymerization and the uniform dispersion of CQDs in bulk sized polymer matrix with well-defined bulk shapes. The luminescent solar concentrator (LSC) properties would be studied. By further 3D printing manufacturing into 3D superstructures, the novel optical propagation properties besides the LSC properties are expected. Via bulk “structure-properties relationship”study, the revolutionary optical propagation properties and original achievements are expected by 3D printed novel 3D superstructures.