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BP4mPy, namely 3,3',5,5'-Tetra[(m-pyridyl)-phen-3-yl]biphenyl, is one of the most popular electron-transporting and hole-blocking layer materials used in OLEDs. It is electron deficient due to the electron-withdrawing nature of its four pyridine pendants. Together with electron-donating materials (e.g. TCTA), BP4mPy can also be used as an exciplex host for red, green, and blue phosphorescent OLEDs. BP4mPy aids effective energy transfer from exciplexes to emitters, thus leading to high efficiencies.
Near infrared-emitting tris-bidentate Os(II) phosphors: control of excited state characteristics and fabrication of OLEDs, J. Liao et al., J. Mater. Chem. C, 3, 4910 (2015); DOI: 10.1039/c5tc00204d.
Efficient donor-acceptor-donor borylated compounds with extremely small ΔEST for thermally activated delayed fluorescence OLEDs, C. Tsai et al., Org. Electron., 63, 166–174 (2018); DIO: 10.1016/j.orgel.2018.09.023.
Blue-emitting Ir(III) phosphors with 2-pyridyl triazolate chromophores and fabrication of sky blue- and white emitting OLEDs, C. Chang et al., J. Mater. Chem. C, 1, 2639 (2013); DOI: 10.1039/c3tc00919j.
Phosphorescent Organic Light-Emitting Diodes with Outstanding External Quantum Efficiency using Dinuclear Rhenium Complexes as Dopants, M. Mauro et al., Adv. Mater., 24, 2054–2058 (2012); DOI: 10.1002/adma.201104831.
Optically Triggered Planarization of Boryl-Substituted Phenoxazine: Another Horizon of TADF Molecules and High-Performance OLEDs, ACS Appl. Mater. Interfaces, 10, 12886−12896 (2018); DOI: 10.1021/acsami.8b00053.
Os(II) metal phosphors bearing tridentate 2,6-di(pyrazol-3-yl)pyridine chelate: synthetic design, characterization and application in OLED fabrication, J. Liao et al., J. Mater. Chem. C, 2, 6269-6282 (2014); DOI: 10.1039/C4TC00865K.
Efficient red, green, blue and white organic lightemitting diodes with same exciplex host, C. Chang et al., Jpn. J. Appl. Phys., 56, 129209 (2017); DOI: 10.7567/JJAP.56.129209.
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