High Efficiency of over 25% and Long Device Lifetime of over 500 h at 1000 nit in Blue Fluorescent Organic Light-Emitting Diodes.
Jinho ParkKi Ju KimJunseop LimTaekyung KimJun Yeob LeePublished in: Advanced materials (Deerfield Beach, Fla.) (2022)
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 95 ) of 208 h at 1000 cd m -2 and over 10 000 h at 100 cd m -2 . The optimized tandem device of the new blue emitter achieves high EQE over 25% and extremely long LT 95 of over 500 h at 1000 cd m -2 and 30 000 h at 100 cd m -2 . The lifetime of this work is one of the best data of blue OLED lifetime reported in the literature.
Keyphrases
- light emitting
- energy transfer
- quantum dots
- highly efficient
- high efficiency
- magnetic resonance
- living cells
- nk cells
- contrast enhanced
- magnetic resonance imaging
- machine learning
- escherichia coli
- pseudomonas aeruginosa
- big data
- electronic health record
- biofilm formation
- staphylococcus aureus
- single molecule
- artificial intelligence