设计了4种不同介质镜结构的全介质镜λ微腔, 并模拟研究了腔内有机发光层的发光特性。结果表明, DBR结构的不同会导致腔镜反射相移的变化, 从而最终改变了器件的透射光谱、腔内驻波电场分布、PL光谱峰值位置和强度等参数。只有合理的器件结构设计才能使腔内的发光得到有效的增强。对称偶数层DBR构成的λ腔可以使谐振峰位置的PL光谱峰值强度增加59倍。

Four different structures of dielectric mirror microcavities with a cavity length of one wavelength were designed, and the luminescent properties of the organic layer inside the cavity were simulated and studied. The results show that different DBR structures lead to the change of phase shift of cavity mirror, which can change the device parameters ultimately, such as the transmittance spectrum, standing wave field distribution inside the cavity, and the peak wavelength and intensity of the PL spectra. Only the reasonable design of device structure can enhance the luminescence inside the cavity effectively. The PL spectrum intensity at the harmonic peak can be enhanced about 59 times in the microcavity constituted by symmetry even layer DBR.