钙钛矿量子点吸收截面大，发光效率高，具有尺寸、组分依赖的光学特性，展现出优异的电致发光性能。但由于钙钛矿材料是离子晶体，离子交换特性使其难以实现白光发射，成为领域研究难点。本项目以稀土离子掺杂钙钛矿量子点为研究对象，以获得高效电致白光LED为目的，围绕稀土离子掺杂对钙钛矿量子点光学性质的影响规律和白光LED中载流子输运机制两个科学问题，研究稀土离子掺杂对钙钛矿量子点能级结构的调控规律，探究获得稀土离子高辐射跃迁速率的有效途径，实现钙钛矿向稀土离子有效能量传递，进而确定产生高效白光的最佳条件；揭示多个发光能级共存情况下的载流子注入和传输机制，获得钙钛矿量子点与稀土离子的多色电致发光；调控LED中载流子迁移层与掺杂钙钛矿量子点层的能级匹配，建立层层之间的势垒补偿方案；研究载流子迁移层和发光层的厚度、退火温度等参数对器件性能影响的规律，提出构筑高效稀土离子掺杂钙钛矿量子点白光LED的有效途径。

Perovskite quantum dots are promising electroluminescence materials owning to their large absorption across, excellent photoluminescence quantum yield, as well as the size and composition-dependent optical properties. However, regarding to the ionic nature of perovskite quantum dots, the stable and high efficient white light emission is difficult to be constructed, which question their practical applications. In this project, the lanthanide ions doped perovskite quantum dots are planning to be proposed for resolving the above problems. We aim to design the lanthanide ions doped perovskite quantum dots with high efficient white light electroluminescence. Two main scientific issues will be revealed including: the regulation mechanism for the lanthanide dopants effect to the optical performance of perovskite quantum dos, as well as the principle for the carrier transportation in the white light emitting devices. The energy level structure in the doped perovskite quantum dots will be studied, the method for the achieving high radiative intrinsic transition of lanthanide ions will be explored, as well as the mechanism and method to improve the energy transfer efficiency from the perovskite quantum dots to lanthanide ions will be established. Based these investigations, the conditions for constructing the high efficient white light emission will be revealed. Furthermore, mechanism for the carrier injection and transition should be investigated to obtaining the multicolor electroluminescence. By adjusting the matching relationship between the carrier transport layer and the perovskite quantum dots layer, the carrier potential compensation will be established. The thickness of the carrier and luminescence layer and the anneal temperature effect to the optical performances of device will be investigated. Finally, the efficient method for constructing the high efficient white light emitting LED based lanthanide ions doped perovskite quantum dots will be proposed.