Lanthanide complexes with d-f transition: new emitters for single-emitting-layer white organic light-emitting diodes.

ABSTRACT: White organic light-emitting diodes (WOLEDs) is a new generation of lighting technology and has stimulated wide-ranging studies. Despite the advantage of simple device structure, single-emitting-layer WOLEDs (SEL-WOLEDs) still face the challenges of difficult material screening and fine energy level regulation. Herein, we report efficient SEL-WOLEDs with a sky-blue emitting cerium(III) complex Ce-TBO^2Et and an orange-red emitting europium(II) complex Eu(Tp^2Et)₂ as the emitters, showing a maximum external quantum efficiency of 15.9% and Commission Internationale de l'Eclairage coordinates of (0.33, 0.39) at various luminances. Most importantly, the electroluminescence mechanism of direct hole capture and hindered energy transfer between the two emitters faci

SUBMITTER: Fang P 

PROVIDER: S-EPMC10328933 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature