Circularly polarized (CP) light-emitting diodes (LEDs) hold great potential for next-generation technologies, from efficient photonic to room-temperature quantum devices. Chiral materials enable the generation of CP electroluminescence in LEDs through several different mechanisms, depending on the choice of material and device architecture. Here we summarize the mechanisms that give rise to CP electroluminescence in state-of-the-art materials, including organic small molecules, polymers, inorganic complexes and hybrid halide perovskites. We explore how the device architecture can be used to control the chiroptical properties and device performance, and suggest improvements to maximize the efficiency and dissymmetry factor of future CP LEDs.

圆偏振 (CP) 发光二极管 (LED) 在从高效光子到室温量子器件的下一代技术中具有巨大潜力。手性材料可以通过几种不同的机制在 LED 中产生 CP 电致发光，具体取决于材料和器件架构的选择。在这里，我们总结了最先进材料（包括有机小分子、聚合物、无机复合物和杂化卤化物钙钛矿）中产生 CP 电致发光的机制。我们探索了如何使用器件架构来控制手性光学特性和器件性能，并提出改进建议，以最大限度地提高未来 CP LED 的效率和不对称系数。