【摘要】 <正>近些年,有机薄膜电致发光(Organic Thin Film Electroluminescent-OTFEL)器件的发展非常迅速。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。更多还原

【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.更多还原