Fabrication of a Solution-Processed White Light Emitting Diode Containing a Single Dimeric Copper(I) Emitter Featuring Combined TADF and Phosphorescence
oleh: Gang Cheng, Dongling Zhou, Uwe Monkowius, Hartmut Yersin
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2021-11-01 |
Deskripsi
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<sub>2</sub>Cl<sub>2</sub>(P∩N)<sub>2</sub> (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<sub>2</sub>Cl<sub>2</sub>(P∩N)<sub>2</sub>/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.