Circularly polarized luminescence (CPL)‐active materials have attracted considerable attention due to their potential applications in various advanced technological fields. CPL activity typically requires compounds that crystallize in noncentrosymmetric chiral space groups. Achieving noncentrosymmetric crystal structures using achiral molecular architectures is highly appealing but remains a significant challenge. Herein, we present a strategy for designing and synthesizing high‐performance CPL materials via crystallization‐driven self‐assembly using achiral architectures. We successfully obtained Mn2+‐based halide enantiomeric hybrids (P‐1 and M‐1), self‐assembled from [MnBr4]2‐ anions and rotational symmetric [Pr‐dabco]2+ cations (Pr‐dabco2+ = 1‐Propyl‐1,4‐diazabicyclo‐[2.2.2]octan‐1‐ium), crystallizing in the chiral space group P212121. The single crystals of 1 exhibit exceptionally high CPL performance, with a luminescence dissymmetry factor |glum| and photoluminescence quantum yield (PLQY) up to 4.8×10‐2 and 86.8%, respectively, thus a record‐high figure of merit (FM) of 4.2×10‐2 among reported Mn2+‐based CPL materials. Furthermore, P/M‐1 based UV‐LED devices demonstrated outstanding light‐emitting performance, including high color‐purity, excellent stability, remarkable luminous brightness (74,591.94 cd m‐2), and a high electroluminescence dissymmetry factor (glum) value of 3.6×10‐2. This study offers a robust strategy for the design and development of high‐performance CPL materials utilizing achiral molecular architectures.

中文翻译：

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由 Achiral Architectures 组装的 Mn-Br 杂化钙钛矿的高效圆偏振发光


圆偏振发光 （CPL） 活性材料因其在各种先进技术领域的潜在应用而引起了相当大的关注。CPL 活性通常需要在非中心对称手性空间基团中结晶的化合物。使用非手性分子结构实现非中心对称晶体结构非常有吸引力，但仍然是一个重大挑战。在此，我们提出了一种通过使用非手性结构的结晶驱动的自组装来设计和合成高性能 CPL 材料的策略。我们成功获得了基于 Mn2+ 的卤化物对映体杂交体（P-1 和 M-1），由 [MnBr4] 2-阴离子和旋转对称 [Pr-dabco]2+ 阳离子（Pr-dabco2+ = 1-丙基-1,4-二氮杂双环-[2.2.2]辛烷-1-鎓）自组装，在手性空间群 P212121 中结晶。1 的单晶表现出极高的 CPL 性能，具有发光不对称因子 |glum|光致发光量子产率 （PLQY） 分别高达 4.8×10-2 和 86.8%，因此在已报道的基于 Mn2+ 的 CPL 材料中，品质因数 （FM） 达到 4.2×10-2 的历史新高。此外，基于 P/M-1 的 UV-LED 器件表现出出色的发光性能，包括高色纯度、出色的稳定性、显着的发光亮度 （74,591.94 cd m‐2） 和 3.6×10-2 的高电致发光不对称因子 （glum） 值。本研究为利用非手性分子结构设计和开发高性能 CPL 材料提供了一种稳健的策略。