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2,5,8,11-Tetra-tert-butylperylene (TBPe), a family member of perylene, has been widely used as a blue fluorescence emitter in OLED devices.
With the introduction of four steric tert-butyl groups to the perylene, electroluminescent devices using TBPe as a dopant have the benefit of electroluminescent color stability; this is due to a lower degree of molecular aggregation tendency in the non-planar perylene structure.
The steric hindrance of the side groups also prevents the formation of exciplex and charge trapping, leading to higher efficiency of the electroluminescent devices.
Electroluminescent Properties of Fully Substituted Ethylene Moieties, S. Kim et al., Mol. Cryst. Liq. Cryst., 458:1, 209-216 (2006); DOI: 10.1080/15421400600932371.
Host Engineering for High Quantum Effi ciency Blue and White Fluorescent Organic Light-Emitting Diode, W. Song et al., Adv. Mater., 27, 4358–4363 (2015); DOI: 10.1002/adma.201501019.
High-efficiency organic light-emitting diodes with fluorescent emitters, H. Nakanotani et al., Nat. Commun., 5:4016 (2014); DOI: 10.1038/ncomms5016.
High efficiency blue fluorescent organic light-emitting diodes using a conventional blue fluorescent emitter, I-H. Lee et al., J. Mater. Chem. C, 3, 8834 (2015); DOI: 10.1039/c5tc01626f.
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