Highly luminescent metal nanoclusters (MNCs) with aggregation-induced emission (AIE) have emerged as a new class of functional materials, which could be deployed to address challenging issues in diverse fields. In view of the wide application of white light-emitting diodes (WLEDs), which suffer from a low color rendering index (CRI, ≤70) and chromaticity parameter drift, we report the development of a high-performance WLED with high luminous efficiency (LE), excellent CRI attributes, and nonchromaticity parameter drift, achieved by employing AIE-featured orange-emitting bimetallic AuAg NCs as a red phosphor. The delicately designed AuAg NCs with ultrasmall size (< 2 nm) have strong emission in the orange-light region (∼610 nm) with a large Stokes shift and more importantly show a very stable yet high absolute photoluminescence quantum yield of 43% in the solid state owing to the AIE property, which makes them suitable for constructing WLEDs for high-end lighting applications. The as-developed AuAg NC-based WLED exhibits an excellent CRI (80.6) and high LE (91.9 lm/W) without chromaticity parameter drift. This study is of broad interest because it not only demonstrates the usage of novel luminescent MNCs for WLED applications but also offers a feasible way for the design of high-performance WLEDs with a high LE, high CRI, and nonchromaticity parameter drift.

中文翻译：

---

具有聚合诱导发射的高发光AuAg纳米簇，适用于高性能白光LED应用

具有聚集诱导发射（AIE）的高发光金属纳米簇（MNC）已作为一类新的功能材料出现，可以用于解决各个领域中的挑战性问题。考虑到发色指数（CRI，≤70）和色度参数漂移低的白光发光二极管（WLED）的广泛应用，我们报告了一种具有高发光效率的高性能WLED的发展（ LE），出色的CRI属性和非色度参数漂移，这是通过采用具有AIE功能的发橙色光的双金属AuAg NC作为红色荧光粉实现的。设计精巧的AuAg NC尺寸超小（< 2 nm）在橙色光区域（〜610 nm）具有强斯托克斯位移的强发射光，更重要的是由于AIE特性在固态下显示出非常稳定但很高的固态绝对光致发光量子产率，为43％，这使得它们适用于为高端照明应用构建WLED。新开发的基于AuAg NC的WLED表现出出色的CRI（80.6）和高LE（91.9 lm / W），而没有色度参数漂移。这项研究受到广泛关注，因为它不仅证明了新型发光MNC在WLED应用中的用途，而且为设计具有高LE，高CRI和非色度参数漂移的高性能WLED提供了可行的方法。新开发的基于AuAg NC的WLED表现出出色的CRI（80.6）和高LE（91.9 lm / W），而没有色度参数漂移。这项研究受到广泛关注，因为它不仅证明了新型发光MNC在WLED应用中的用途，而且为设计具有高LE，高CRI和非色度参数漂移的高性能WLED提供了可行的方法。新开发的基于AuAg NC的WLED表现出出色的CRI（80.6）和高LE（91.9 lm / W），而没有色度参数漂移。这项研究受到广泛关注，因为它不仅证明了新型发光MNC在WLED应用中的用途，而且为设计具有高LE，高CRI和非色度参数漂移的高性能WLED提供了可行的方法。