Top-emitting organic light-emitting diodes can achieve high efficiencies due to the strong cavity effect resulting from the relatively thick semi-transparent metallic top electrode. The strong cavity resonance, however, simultaneously brings along negative side effects such as pronounced angular-dependent emission and spectral narrowing. In this work, through numerical simulations, we demonstrate that top-emitting organic light-emitting diodes using a thin Au(2nm)/Ag(7nm) top electrode can achieve light-outcoupling efficiency comparable to a thick silver electrode, while reducing spectral narrowing. This can be realized by tuning the organic capping layer thickness without affecting the electrical properties, which can be applied to diodes based on either intrinsic or efficiently doped charge transport layers.

由于由相对较厚的半透明金属顶部电极产生的强腔效应，顶部发射有机发光二极管可以实现高效率。然而，强的腔共振同时带来负面影响，例如明显的角度依赖性发射和光谱变窄。在这项工作中，通过数值模拟，我们证明使用薄Au（2nm）/ Ag（7nm）顶部电极的顶部发射有机发光二极管可以实现与厚银电极相当的光输出耦合效率，同时减少光谱变窄。这可以通过调整有机覆盖层的厚度而不影响电性能来实现，可以将其应用于基于本征或有效掺杂的电荷传输层的二极管。