Liu Xinyuan, Li Wenlian, Yu Jiaqi, Zhao Yu, Zhao Xu, Yu Yi, Sun Gang, Zhong Guozhu. THE FORMING PROCESS OF THE ORGANIC THIN FILM ELECTROLUMINESCENCE[J]. Chinese Journal of Luminescence, 1996,17(4): 376-378
Liu Xinyuan, Li Wenlian, Yu Jiaqi, Zhao Yu, Zhao Xu, Yu Yi, Sun Gang, Zhong Guozhu. THE FORMING PROCESS OF THE ORGANIC THIN FILM ELECTROLUMINESCENCE[J]. Chinese Journal of Luminescence, 1996,17(4): 376-378DOI:
有机薄膜电致发光(Organic Thin Film Electroluminescent-OTFEL)器件的发展非常迅速
[1
2
3]
。由于它易于实现大面积彩色显示
成为发光研究中的热点。目前研究工作面临的最大问题是器件的稳定性。通常
OTFEL器件在空气中的老化速度很快。连续工作时
器件发光的时间约几个小时。在恒定电流驱动下
器件的亮度从快到慢持续下降
同时驱动电压逐渐上升
说明器件的老化伴随着电阻的增大。在研究OTFEL器件老化机制的过程中
我们发现了一种非常有意义的现象:器件在恒定脉冲电压驱动下
随驱动时间的增加
初始亮度经过一个短暂上升的过程。
Abstract
The degradation properties of the Organic Thin Film Electroluminescent (OTFEL) devices consisting of a Alq(as a light-emitting layer) and PVK (as a hole-transporting layer) were studied in an ambient temperature.Under a constant pulse voltage driving
we found a very interesting EL forming phenomenon for the first time:at the initial step of the operating process
the luminance and current density increase first
reach maximum
then decrease. The mechanism of the forming process being investigated.