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Updated: Jun 14, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Reduced efficiency roll-off in organic light-emitting diodes by a novel short-lived organoeuropium emitter
Liming Zhang1, Bin Li, Liying Zhang
1Key Laboratory of Excited State Processes, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People's Republic of China.
Abstract:
In this paper, we report a novel organoeuropium complex [Eu(DPDBM)(3)DPPZ] based on a triphenylamine-derived beta-diketone ligand for short-lived emitter exploration. The (5)D(0) --> (7)F(2) ( approximately 610 nm) luminescence lifetime of Eu(DPDBM)(3)DPPZ is only 30 mus, which is 1 order of magnitude shorter than that of a typical Eu(3+) complex. The electroluminescence device using Eu(DPDBM)(3)DPPZ as the emitter achieves a maximum current efficiency of 3.0 cd/A, and the efficiency roll-off is largely reduced because of the emitter's short luminescence lifetime.
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