Fabrication of a Solution-Processed White Light Emitting Diode Containing a Single Dimeric Copper(I) Emitter Featuring Combined TADF and Phosphorescence

Luminescent copper(I) complexes showing thermally activated delayed fluorescence (TADF) have developed to attractive emitter materials for organic light emitting diodes (OLEDs). Here, we study the brightly luminescent dimer Cu Cl (P∩N) (P∩N = diphenylphosphanyl-6-methyl-pyridine), which shows both T...

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Veröffentlicht in:	Micromachines (Basel) 2021-11, Vol.12 (12), p.1500
Hauptverfasser:	Cheng, Gang, Zhou, Dongling, Monkowius, Uwe, Yersin, Hartmut
Format:	Artikel
Sprache:	eng
Schlagworte:	Ambient temperature combined singlet and triplet harvesting combined thermally activated delayed fluorescence and phosphorescence Communication Coordination compounds Copper dimeric copper(I) complexes Dimers Efficiency Emitters Fluorescence Investigations Ligands Lithium fluoride Metals Organic light emitting diodes organic light emitting diodes (OLEDs) Phosphorescence P∩N phosphine ligands Quantum efficiency thermally activated delayed fluorescence (TADF) White light
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Beschreibung
Zusammenfassung:	Luminescent copper(I) complexes showing thermally activated delayed fluorescence (TADF) have developed to attractive emitter materials for organic light emitting diodes (OLEDs). Here, we study the brightly luminescent dimer Cu Cl (P∩N) (P∩N = diphenylphosphanyl-6-methyl-pyridine), which shows both TADF and phosphorescence at ambient temperature. A solution-processed OLED with a device structure ITO/PEDOT:PSS/PYD2: Cu Cl (P∩N) /DPEPO (10 nm)/TPBi (40 nm)/LiF (1.2 nm)/Al (100 nm) shows warm white emission with moderate external quantum efficiency (EQE). Methods for EQE increase strategies are discussed.
ISSN:	2072-666X 2072-666X
DOI:	10.3390/mi12121500