一种微腔有机发光二极管的设计与性能研究

Property Investigation and Design of Microcavity Organic Light-emitting Diode

设计了PPV为发光层、Ag和DBR为上下反射镜、结构为Glass/DBR/ITO/PPV/Ag的微腔有机发光二极管。应用特征矩阵法,系统地研究了DBR和银镜的性质对器件性能的影响。结果表明:1)当金属厚度较小时,随着厚度的增加,器件的反射峰值不断增加并且蓝移,但是当厚度达到100 nm后,再增加厚度反射谱基本上没变化;2)随着DBR周期数的增加,器件的反射谱峰值不断增大,峰值半宽度不断变窄。3)器件的EL谱的峰值随着金属反射率的增加不断增大,而随着DBR反射率的增加是先增加后减小的。并给出了不同条件下DBR的最优化选择依据。

A microcavity organic light emitting device was designed in this article. The structure of this device is glass/DBR/ITO/PPV/Ag. PPV is the light-emitting layer. Ag and DBR are the reflectors. Using the transport method,the influence of the properties of the DBR and silver mirror on the performance of the device was deeply studied. It was found that. 1） when the thickness of the metal is small, the reflection peak value of the device increased and blue-shifted with increasing the thickness, but after the thickness reached to 100 nm, the reflection spectrum of the device had no change with increasing the thickness. 2） With the increasing of the periods of DBR, the reflection peak value of the device increased and the full wave at half maximum became narrow. 3） the peak value of EL of the device increased with the increasing of metal reflectivity, and as the increasing of the reflectivity of DBR the peak value reduced after increased. The optimization method of DBR was given on the different conditions.