The optoelectronic applications of clusters emerged rapidly. Cluster light‐emitting diodes (CLED) as representative hold promise as a new generation of displays and lightings. However, as one of the main challenges in electroluminescence (EL) field, until present, no deep‐blue CLEDs were reported, due to the strict requirements on excited‐state characteristics of clusters. Herein, two phosphine‐stabilized Au3 triangle and Au3Ag pyramid named [O(Audppy)3]BF4 and [O(Audppy)3Ag](BF4)2 were chosen to demonstrate efficient deep‐blue CLEDs. The ligand‐incorporated charge transfer transitions of the clusters contribute to both singlet and triplet excited states of the clusters, giving rise to phosphorescence at 460 nm and EL emissions at 436 nm. Based on device engineering, the maximum luminescence beyond 8000 nits and the chromatic coordinates with y <0.1 in deep‐blue region verify the competence of CLEDs for high‐resolution displays.

The optoelectronic applications of clusters emerged rapidly. Cluster light-emitting diodes (CLED) as representative hold promise as a new generation of displays and lightings. However, as one of the main challenges in electroluminescence (EL) field, until present, no deep-blue CLEDs were reported, due to the strict requirements on excited-state characteristics of clusters. Herein, two phosphine-stabilized Au 3 triangle and Au 3 Ag pyramid named [O(Audppy) 3 ]BF 4 and [O-(Audppy) 3 Ag](BF 4 ) 2 were chosen to demonstrate efficient deep-blue CLEDs. The ligand-incorporated charge transfer transitions of the clusters contribute to both singlet and triplet excited states of the clusters, giving rise to phosphorescence at 460 nm and EL emissions at 436 nm. Based on device engineering, the maximum luminescence beyond 8000 nits and the chromatic coordinates with y < 0.1 in deep-blue region verify the competence of CLEDs for high-resolution displays.

Organic functional materials have attracted significant research attention in organic chemistry. Introducing the synthesis and characterization of advanced organic functional materials into basic organic chemistry experiments can enrich the study content and promote the connection between teaching and academic achievements. Therefore, in this project, one of the research frontiers, i.e., organic long-afterglow materials, were selected and combined with the laboratory teaching of nucleophilic aromatic substitution. This project can help students understand the key role of synthetic reactions in constructing organic functional materials. Furthermore, extending the knowledge system to modern spectroscopy technologies can help students understand correct scientific concepts. This experiment completes the systematic teaching of the "synthesis-molecular structure-photoelectric properties" knowledge chain, thereby developing students' science literacy and continual innovatory capacity.