Circularly polarized (CP) electroluminescence from organic light-emitting diodes (OLEDs) has aroused considerable attention for their potential in future display and photonic technologies. The development of CP-OLEDs relies largely on chiral-emitters, which not only remain rare owing to difficulties in design and synthesis but also limit the performance of electroluminescence. When the polarization (pseudospin) degrees of freedom of a photon interact with its orbital angular momentum, photonic spin-orbit interaction (SOI) emerges such as Rashba-Dresselhaus (RD) effect. Here, we demonstrate a chiral-emitter-free microcavity CP-OLED with a high dissymmetry factor (g_EL) and high luminance by embedding a thin two-dimensional organic single crystal (2D-OSC) between two silver layers which serve as two metallic mirrors forming a microcavity and meanwhile also as two electrodes in an OLED architecture. In the presence of the RD effect, the SOIs in the birefringent 2D-OSC microcavity result in a controllable spin-splitting with CP dispersions. Thanks to the high emission efficiency and high carrier mobility of the OSC, chiral-emitter-free CP-OLEDs have been demonstrated exhibiting a high g_EL of 1.1 and a maximum luminance of about 60000 cd/m², which places our device among the best performing CP-OLEDs. This strategy opens an avenue for practical applications towards on-chip microcavity CP-OLEDs.

来自有机发光二极管 (OLED) 的圆偏振 (CP) 电致发光因其在未来显示和光子技术中的潜力而引起了相当大的关注。CP-OLED 的发展在很大程度上依赖于手性发射体，由于设计和合成困难，手性发射体不仅很少见，而且限制了电致发光的性能。当光子的偏振（伪自旋）自由度与其轨道角动量相互作用时，会出现光子自旋轨道相互作用 (SOI)，例如 Rashba-Dresselhaus (RD) 效应。在这里，我们展示了具有高不对称因子 ( g _EL) 和高亮度，通过在两个银层之间嵌入薄的二维有机单晶 (2D-OSC)，银层用作形成微腔的两个金属镜，同时也用作 OLED 架构中的两个电极。在存在 RD 效应的情况下，双折射 2D-OSC 微腔中的 SOI 导致具有 CP 色散的可控自旋分裂。由于 OSC 的高发射效率和高载流子迁移率，无手性发射极的 CP-OLED 已被证明具有 1.1 的高g _EL和约 60000 cd/m ²的最大亮度，这使我们的设备跻身于性能最佳的 CP-OLED。该策略为片上微腔 CP-OLED 的实际应用开辟了道路。