Meng Yanlong, Xie Wenfa, Xie Guohua, Zhang Letian, Zhao Yi, Hou Jingying, Liu Shiyong
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University,Changchun, China.
Opt Express. 2009 Mar 30;17(7):5364-72. doi: 10.1364/oe.17.005364.
The phase shift on the reflection from a semitransparent electrode of a top-emitting organic light-emitting device is utilized in this paper to realize a deep blue emission with high efficiency. The phase shift could be adjusted by changing the thickness of Alq(3) when it was deposited onto the semitransparent electrode of the device. Through simulation it is found that the blue shift of the resonant wavelength occurs in a certain range, which is concerned with Alq(3) thickness and the cavity length between two reflective electrodes. According to the simulation, a blue top-emitting organic light-emitting device with a designed structure was demonstrated experimentally by using such a phase-shift adjustment layer. Finally, the device showed excellent performance both in efficiency (3.4 cd/A at 8 V) and Commission Internationale de l'Eclairage coordinates (0.13, 0.15). The brightness of the device reached 20 000 cd/m(2).
本文利用顶部发射有机发光器件半透明电极反射时的相移来实现高效深蓝色发射。当将Alq(3)沉积到器件的半透明电极上时，可通过改变其厚度来调整相移。通过模拟发现，共振波长在一定范围内发生蓝移，这与Alq(3)厚度和两个反射电极之间的腔长有关。根据模拟结果，通过使用这种相移调节层，实验展示了一种具有设计结构的蓝色顶部发射有机发光器件。最后，该器件在效率（8 V时为3.4 cd/A）和国际照明委员会坐标（0.13, 0.15）方面均表现出优异性能。器件亮度达到20000 cd/m²。
