Ag(i) emitters with ultrafast spin-flip dynamics for high-efficiency electroluminescence.

ABSTRACT: Carbene-metal-amide (CMA) complexes are appealing emitters for organic light-emitting diodes (OLEDs). However, little is known about silver(i)-CMA complexes, particularly electroluminescent ones. Here we report a series of Ag(i)-CMA complexes prepared using benzothiophene-fused carbazole derivatives as amide ligands. These complexes emit via thermally activated delayed fluorescence (TADF), together with high photoluminescence quantum yields of up to 72% in thin films. By strengthening the π-donating ability of the amide ligands, ultrashort emission lifetimes of down to 144 ns in thin films and 11 ns in solution (with a radiative rate constant of ∼10⁷ s^-1) are realized, among the shortest lifetimes for TADF emitters. Key to this unique feature is the ultrafast s

SUBMITTER: Ying A 

PROVIDER: S-EPMC11613957 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature