有机发光器件中非对称金属微腔的光学特

为了提高有机金属微腔器件的光外耦合率,利用传输矩阵理论及微腔理论建立了光外耦合率的优化模型.通过在金属微腔的阴极加入介质层形成复合阴极,比较复合阴极对反射率、透射率和反射相位的影响,并分析了微腔效应对复合阴极和单金属阴极器件的影响，得到了最优化的光外耦合率.结果表明,考虑微腔效应并且忽略界面复合、吸收的情况下，当金属层厚度在5 nm、介质层厚度在50 nm的附近时，中心波长550 nm光达到最高的光外耦合率.介质层的加入在理想情况下可将光外耦合率相对单金属阴极提高12倍.

Optical properties of unsymmetrical metal microcavity in organic luminescent devices

In order to improve the light outcoupling efficiency of organic metal microcavity, an optimum model of light outcoupling efficiency based on microcavity theory and transfer matrix theory was constructed. Complex cathode was formed by adding dielectric layer to the cathode of metal microcavity. After the influences of complex cathode on reflectance, transmittance and phase of reflection was compared, the microcavity effects on complex cathode and single layer metal cathode were analyzed, and the optimum light outcoupling efficiency was obtained. The results indicate that the outcoupling efficiency at 550 nm wavelength is best considering microcavity effect but not the interface absorbance and combination when the thicknesses of metal layer and dielectric layer are about 5 nm and 50 nm respectively. The introduction of dielectric layer makes the light outcoupling efficiency 12 times higher than that of single metal layer cathode.