可溶液加工的有机-无机复合级联发光器件及其工作机制

项目名称： 可溶液加工的有机-无机复合级联发光器件及其工作机制

项目编号： No.11474232

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 杨晓晖

作者单位： 西南大学

项目金额： 90万元

中文摘要： 有机-无机复合发光器件因避免使用对水、氧敏感的低功函数金属而具有较好的环境稳定性，这一特性引起了高度关注与广泛研究。尽管已取得较大进展，但器件的发光效率和驱动寿命仍低于采用有机载流子传输层的发光器件。针对这一关键问题，本项目对有机-无机复合发光器件进行了预研，以支化聚乙烯亚胺作为界面修饰层来解决目前普遍采用具有较强极性和结晶性金属无机盐界面修饰层影响发光层形貌和产生漏电流等问题，制备了具有较高发光效率的聚合物和小分子材料发光器件。在此基础上，从优化界面修饰材料和发光层制备两方面入手来提高器件的发光效率，进一步探索具有良好电荷产生和注入效率以及驱动稳定性的连接层来制备可溶液加工的有机-无机级联发光器件。该研究将显著提高可溶液加工有机发光器件的效率和寿命，可揭示界面修饰层对金属氧化物层电子注入效率的调控机制，而且连接层中电荷产生和注入过程的研究会加深和拓展对有机光电子器件基本问题的认识。

中文关键词： 有机-无机复合发光器件；金属氧化物；界面修饰层；连接层；级联发光器件

英文摘要： Hybrid organic-inorganic light emitting devices employing metal oxides as carrier transport layers show improved environmental stability compared to conventional devices as air sensitive low work-function metals are eliminated from the device configuration. Despite significant advances have been witnessed, hybrid organic-inorganic light emitting devices show inferior performance compared to the counterpart devices using organic carrier transport layers. In the feasiblity study for this project, we use ethoxylated polyethylenimine as the interfacial modifier for metal oxide layer to avoid the issues of interruption of the organic layer morphology and defect-induced leakage current for commonly-adopted metal salt interlayer, which results in efficient polymer and small molecule light emitting devices. We will proceed with optimization of both the interfacial modifier and the preparation of emissive layer to improve device efficiency. Futher work is designed to explore charge generation layer and obtain solution-processable stacked light emitting devices. The project is expected to improve the luminance efficiency of solution-processed light emitting devices and stimultaneously allow better understanding of mechanisms underlying the modulation of carrier injectin efficiency at the organic-inorganic interface and carrier generation process in the connecting layer.

英文关键词： hybrid organic-inorganic light emitting device;metal oxide;interfacial modifier;connecting layer;stacked light emitting device