Zhou Shaochen, Peng Bo, Duan Yanyan, Liu Kai, Ikkala Olli, Ras Robin H A
Department of Applied Physics, School of Science, Aalto University, 00076, Espoo, Finland.
IMDEA Materials Institute, Calle Eric Kandel 2, 28906, Getafe, Spain.
Angew Chem Int Ed Engl. 2022 Oct 4;61(40):e202210808. doi: 10.1002/anie.202210808. Epub 2022 Aug 31.
Fluorescent supraparticles of gold, silver and copper nanoclusters are synthesized by simply drying of invert emulsions, resulting in a dozen-fold increase in photoluminescence quantum yield (up to ≈80 %) and a significant improvement in photostability. The inhibition of the ligand twisting during the intramolecular charge transfer is found to be responsible for the enhancement, especially for the gold nanocluster supraparticles. This research provides a general, flexible, and easy method for producing highly luminescent and photostable metal nanocluster-based materials that promise practical applications in white-light-emitting diodes.
通过简单干燥反相乳液合成了金、银和铜纳米团簇的荧光超粒子，使光致发光量子产率提高了十几倍（高达约80%），并显著提高了光稳定性。研究发现，分子内电荷转移过程中配体扭转的抑制是导致这种增强的原因，尤其是对于金纳米团簇超粒子。这项研究提供了一种通用、灵活且简便的方法来制备高发光性和光稳定的基于金属纳米团簇的材料，有望在白光发光二极管中得到实际应用。
