摘要
有机电致发光器件(organic light-emitting device,OLED)具有结构简单、驱动电压低、柔性好、可实现大面积显示等特点,在光通信、信息显示与固态照明等领域均显现出巨大的商业应用前景,备受学术界和产业界的关注.自1987年以来,OLED器件迅速发展,其亮度和效率已达到实用化的要求,但是目前产业化面临的主要难题之一就是器件的稳定性问题.本文主要介绍了OLED器件的非本质老化机理和本质老化机理,对黑点形成、薄膜形貌不稳定、金属原子扩散、[Alq_3[^+阳离子和正电荷积累等多种OLED老化机理进行了总结和讨论,并针对这些老化机理重点阐述改善OLED器件工作稳定性的方法.最后,对OLED器件稳定性研究的发展趋势做了展望.
Organic light-emitting device （OLED） has well-recognized advantages in simple structure, low-driving voltage, flexibility, large area and availablity. It shows tremendous commercial applications in optical communication, information display and solid-state lighting, and has been one of the most attractive projects in optoelectronic information field over the last decade. Since 1987, OLED has rapidly developed, its brightness and efficiency has reached the practical demands. However, one of the main challenges to the industrialization is the stability of the device. In this paper, some of the extrinsic and intrinsic degradation mechanisms in OLEDs are summarized and discussed, such as the dark-spot formation, morphological instability of organic thin film, metal-atom diffusion, Alq3 cationic and positive charge accumulation. After that, we summarize the approaches to obtaining the long lifetime OLED. Finally, some perspectives on the stability of OLED are proposed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第20期488-502,共15页
Acta Physica Sinica
基金
国家重点基础研究发展计划(批准号:2009CB930600,2012CB723402,2012CB933301)
国家自然科学基金(批准号:61204048)
江苏省高校自然科学研究项目(批准号:12KJB510013)
南京邮电大学科研启动基金(批准号:NY211025)
江苏高校优势学科建设工程资助的课题~~
关键词
有机电致发光器件
老化机理
稳定性
organic light-emitting devices, degradation mechanisms, stability
