卤化钙钛矿发光峰比有机分子和II-VI量子点的发光峰都要窄，具有发光峰位置可调、可溶液加工和超窄的荧光半峰宽等优点，是较为理想可用于发光二极管的材料。目前，钙钛矿发光受限于光耦合输出效率、俄歇复合和薄膜稳定性等挑战，其性能比有机或量子点发光器件要低。通过介电限制效应和有机/无机相微纳结构来调控发光器件性能目前尚未见报道，对其如何提高器件发光效率和光耦合输出的手段比较欠缺。针对这这些问题，本项目通过改变配体种类和有机添加剂分子，调节有机相和无机相的相分离的纳米结构，优化介电限制效应与激子结合能之间的关系，揭示微纳结构与光耦合输出之间的关系，理解影响发光效率和电学传输的关键光物理机制，预期获得具有高激子结合能材料，实现高效率的发光器件。本项目将为设计新型的发光器件提供实验和理论指导。

Halide perovskite shows narrower photoluminescence peak than those of organic semiconductor or II-VI quantum dots, it is an ideal light-emitting diode materials for high quality display devices with its solution-processbility, continuous tunable emission peak. However, the perovskite light-emitting diode still shows inferior performance limited by low light-out-coupling efficiency, Auger recombination and poor film stability. There is no report on using dielectric effect and organic/inorganic phase separation to improve the device performance. .To boost this research area, the combination of cutting-edge expertise on various aspects, from chemical synthesis to physics, and from materials science to device engineering, is required. Indeed, this is the approach pursued by the present project, which aims at establishing a direct correlation between: a) the synthesis of new perovskite emitters with superior luminescence properties by dialectical confinement and organic/inorganic phase separation micro-nanostructure; b) the experimental investigation of their photophysical and optoelectronic properties. This work will allow insight into structure-property relations, thus enabling the development of high-performance perovskite emitters. Finally, the project will tackle the application of the newly developed emitters and the physical insight gained to the realization of high-performance light-emitting diodes.