基于氢键-配位键协同调控的Dion-Jacobson钙钛矿高效稳定LEDs研究

铅卤钙钛矿以其优异的光电性能，在发光二极管（LEDs）领域展现出独特的优势，在极短的时间内实现了效率的突破式发展，有望应用于新一代高清显示。然而器件稳定性差一直制约其进一步发展，钙钛矿材料作为发光层，其自身结构稳定性差是根本因素。因此，提高钙钛矿自身结构稳定性是提升器件稳定性的重要研究方向之一。D-J结构提高了钙钛矿的解离能，使其结构稳定。但是，发光效率低，导致载流子损耗严重而限制器件性能的突破。.本项目以设计和开发高效稳定的D-J型可见光钙钛矿材料及其器件为研究目的，提出了基于胺基配位调控的“氢键-配位键”协同作用新策略，实现D-J钙钛矿薄膜的稳定结构和高效发光。深入分析胺基配位调控对钙钛矿空间结构和光电性能的影响，抑制载流子损耗，力争在钙钛矿LEDs的稳定性方面取得突破性进展。本项目有望为后续稳定且高效发光的钙钛矿材料优化和器件构筑提供重要的实验和理论指导。

Lead halide perovskites has great application prospect in a new generation of high-definition display, as the external quantum efficiency (EQE) of perovskite-based light-emitting diodes (LEDs) has exhibited the rapid development in a very short period of time, with excellent photoelectric properties. However, the poor stability of the device has been restricting further development, and the poor structural stability of perovskite is the fundamental factor. Therefore, improving the stability of perovskite is one of the important research directions to improve the device stability. D-J structure increases the dissociation energy of perovskite and makes it more stable. However, low emission efficiency leads to serious loss of carrier and limits the breakthrough of device performance..This project aims to design and construct stable D-J perovskite films and LEDs with high-efficiency visible light, and we propose a new strategy of "hydrogen bond - coordination bond" synergy based on amine coordination regulation, so as to receive the stable structure and efficient luminescence of D-J perovskite films. The influence of amine coordination regulation on the spatial structure and photoelectric properties of perovskite will be deeply analyzed, so as to reduce the loss of carrier and make a breakthrough in the stability of perovskite LEDs. The project is expected to provide experimental and theoretical guidance for the subsequent optimization of perovskite materials and the construction of devices with stable and efficient luminescence.