High Efficiency of over 25% and Long Device Lifetime of over 500 h at 1000 nit in Blue Fluorescent Organic Light-Emitting Diodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35332951.
- Also identified by DOI 10.1002/adma.202108581.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
In this study, a multiple resonance (MR) type blue emitter is synthesized, characterized, and evaluated for highly efficient and stable blue fluorescent organic light-emitting diodes (OLEDs). The MR blue fluorescent emitter has a di-tert-butyl benzene substituent in the MR core structure to minimize quenching mechanisms by intermolecular interaction. The emitter shows a high photoluminescence quantum yield and small full width at half maximum of 22 nm, which realize high external quantum efficiency (EQE) of 11.4% in the single unit OLED and device lifetime up to 95% of the initial luminance (LT<sub>95</sub> ) of 208 h at 1000 cd m<sup>-2</sup> and over 10 000 h at 100 cd m<sup>-2</sup> . The optimized tandem device of the new blue emitter achieves high EQE over 25% and extremely long LT<sub>95</sub> of over 500 h at 1000 cd m<sup>-2</sup> and 30 000 h at 100 cd m<sup>-2</sup> . The lifetime of this work is one of the best data of blue OLED lifetime reported in the literature.