溶液方法制备的有机小分子OLED器件老化机理和稳定性研究

项目名称： 溶液方法制备的有机小分子OLED器件老化机理和稳定性研究

项目编号： No.61204048

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 张新稳

作者单位： 南京邮电大学

项目金额： 30万元

中文摘要： 降低器件制备成本和提高器件工作寿命是有机电致发光器件（OLED）产业化发展所面临的两大难题。溶液方法制备有机小分子OLED器件由于其成本低、工艺简单、性能优越，受到人们的广泛关注，但器件的稳定性较差，距实用化仍有一定的距离。因此，针对溶液方法制备的有机小分子OLED器件的老化机理和稳定性问题开展研究具有重要意义。本项目通过研究溶液方法制备的有机小分子薄膜性能影响OLED器件老化的关键因素，以及器件的电学老化、黑点老化和光/热老化的成因，构建器件老化物理模型，揭示器件的老化机理。以此为指导，通过有针对性地调控发光层、主体材料和器件结构来改善器件的稳定性。通过本项目的实施，初步建立溶液方法制备有机小分子OLED器件的老化机理与提高这类器件稳定性的实践方法，为溶液方法制备的有机小分子OLED器件及其它有机半导体器件的稳定性研究奠定重要的理论和实践基础，为促进OLED器件产业化发展做出一定贡献。

中文关键词： 有机小分子；溶液方法；电致发光器件；老化机理；稳定性

英文摘要： The two major challenges facing organic light-emitting devices (OLEDs) industry development are abtaining long lifetimes and low manufacturing costs. Solution processed small molecular OLEDs have attracted much attention because of their excellent performances, low-cost and simplified fabrication process. The performances of solution-processed small molecular OLEDs have been close to the vacuum-deposited counterparts, but the lifetimes of the devices are significantly shorter for the solution-processed devices than for the vacuum-processed ones. Therefore, it has important significance to study the degradation mechanisms and stability of solution-processed small molecular OLEDs. How to improve the stability of solution-processed small molecular devices has been urgent in the OLEDs industry development. Based on the needs, we intend to carry out experimental research on the stability of solution-processed small molecular OLEDs to explore the degradation mechanisms and to improve lifetime. In this project, the distinctive nature of the films fabricated using solution-processed small molecules will be investigated with a comparison of the vacuum-deposited films to explore its influence on the degradation of OLEDs. The electrical aging, dark spots growth, photodegradation and thermal aging of the solution-processed

英文关键词： Organic small molecules；Solution-process；Organic light-emitting devices；Degradation mechanisms；Stability