期刊
DALTON TRANSACTIONS
卷 50, 期 37, 页码 12806-12813出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt02269e
关键词
-
资金
- Russian Science Foundation [20-73-10053]
- [MD-2799.2019.3]
OLEDs based on lanthanide complexes have optical advantages but are hindered by low brightness. Experimental data indicate that the long lifetime of their excited states is a key parameter affecting their performance. Despite having low quantum yields, lanthanide complexes with the shortest lifetimes achieve the best results.
OLEDs based on lanthanide complexes have decisive optical advantages but are hampered by low brightness. Despite the efforts to optimize several parameters such as quantum yield and charge carrier mobility, there seems to be another key parameter that hinders their performances. Experimental data are therefore collected for mixed-ligand europium complexes with bathophenanthroline and different classes of anionic ligands and screened to identify the key parameter responsible for this situation, which turns out to be the long lifetime of their excited states. A broad literature search supports this conclusion, showing that lanthanide complexes are inferior to other classes of OLED emitters often because of their long lifetimes; furthermore, among a series of lanthanide complexes, the best results are achieved for those with the shortest lifetimes, even though they suffer from low quantum yields.
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