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设计了结构为Glass/DBR/ITO/TPD/Alq3/Ag的微腔有机发光器件。从理论上详细地研究了腔内各层结构对器件电致发光谱性能的影响。结果表明:随着腔长厚度的增加,器件的归一化电致发光谱强度不断减小;在可见光区,器件的EL谱随发光层厚度的增加出现振荡变化。空穴传输层和发光层的界面位置对器件电致发光谱的影响也很大。最后得到,在设计微腔时发光层厚度要尽量窄,并且中心发光区域应位于谐振腔中电场的峰值位置。
A microcavity organic light-emitting device with a structure of Glass / DBR / ITO / TPD / Alq3 / Ag was designed. The effect of the structure of each layer in the cavity on the electroluminescence properties of the device has been studied theoretically in detail. The results show that the intensity of normalized electroluminescence decreases with the increase of the thickness of the cavity. In the visible region, the EL spectrum of the device changes with the increase of the thickness of the emitter. The hole transport layer and the light-emitting layer interface position on the device electroluminescence spectra of great influence. Finally, the thickness of the light-emitting layer should be as narrow as possible in designing the microcavity, and the central light-emitting region should be located at the peak of the electric field in the resonator.