Chiral luminescence materials have potential applications in the field of three-dimensional displays due to their circularly polarized luminescence (CPL) characteristics. However, the further development of circularly polarized organic light-emitting diodes (CP-OLEDs) needs to meet the requirements of high efficiency, high color purity, low cost, and high dissymmetry factor (g_PL or g_EL), chiral multiple resonance thermally activated delayed fluorescence (MR-TADF) materials are considered as candidates in these aspects. Herein, based on a pair of chiral spirofluorene precursors, two pairs of high-performance chiral MR-TADF emitters ((R/S)-p-Spiro-DtBuCzB and (R/S)-m-Spiro-DtBuCzB) are developed, which exhibit strong emissions peaking at 491 and 502 nm in toluene with full-width at half-maximum values of 25 and 33 nm, respectively. In addition, small singlet–triplet energy gaps of 0.15 and 0.10 eV with high absolute photoluminescence efficiencies of 95.0% and 96.7% are observed for p-Spiro-DtBuCzB and m-Spiro-DtBuCzB molecules, respectively. OLEDs based on p-Spiro-DtBuCzB and m-Spiro-DtBuCzB display high maximum external quantum efficiencies of 29.6% and 33.8%, respectively. Most importantly, CP-OLEDs present symmetric circularly polarized electroluminescence spectra with ∣g_EL∣ factors of 3.36×10⁻⁴ and 7.66×10⁻⁴ for devices based on (R/S)-p-Spiro-DtBuCzB and (R/S)-m-Spiro-DtBuCzB enantiomers, respectively.

手性发光材料由于其圆偏振发光（CPL）特性，在三维显示领域具有潜在的应用前景。然而，圆偏振有机发光二极管（CP-OLED）的进一步发展需要满足高效率、高色纯度、低成本和高不对称因子（g _PL 或g < b1>），手性多重共振热激活延迟荧光（MR-TADF）材料被认为是这些方面的候选材料。在此，基于一对手性螺芴前体，开发了两对高性能手性MR-TADF发射体（(R/S)-p-Spiro-DtBuCzB和(R/S)-m-Spiro-DtBuCzB），在甲苯中，它们在 491 和 502 nm 处表现出强发射峰，半峰全宽分别为 25 和 33 nm。此外，p-Spiro-DtBuCzB 和 m-Spiro-DtBuCzB 分子的单重态-三重态能隙分别为 0.15 和 0.10 eV，绝对光致发光效率分别为 95.0% 和 96.7%。基于 p-Spiro-DtBuCzB 和 m-Spiro-DtBuCzB 的 OLED 分别显示出 29.6% 和 33.8% 的高最大外部量子效率。最重要的是，CP-OLED 呈现出对称的圆偏振电致发光光谱，对于基于分别为 (R/S)-p-Spiro-DtBuCzB 和 (R/S)-m-Spiro-DtBuCzB 对映体。