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B3PymPm is an isomer to B2PymPm and B4PymPm, with a 2-methylpyrimidine core structure with four pyridine pendants. It is electron-deficient and can be used in OLED devices as an electron-transporting or hole-blocking layer material.
B3PymPm is known to form hydrogen bonding in and between molecules. The intermolecular and intramolecular hydrogen bondings are believed to promote film morphology - hence enhancing charge mobility.
Due to its electron-deficient nature, together with TCTA, B3PymPm is also used in thermally activated delayed fluroescent (TADF) devices as an exciplex-forming cohost to fabricate highly-efficient fluorescent organic light-emitting diodes.
Development of high performance OLEDs for general lighting, H. Sasabe et al., J. Mater. Chem. C, 1, 1699 (2013); DOI: 10.1039/c2tc00584k.
A high performance inverted organic light emitting diode using an electron transporting material with low energy barrier for electron injection, J. Lee et al., Org. Electron., 12, 1763–1767 (2011); doi: 10.1016/j.orgel.2011.07.015.
High efficiency and non-color-changing orange organic light emitting diodes with red and green emitting layers, S. Lee et al., Org. Electron., 14, 1856–1860 (2013); doi: 10.1016/j.orgel.2013.04.020.
Design of Heteroleptic Ir Complexes with Horizontal Emitting Dipoles for Highly Efficient Organic Light-Emitting Diodes with an External Quantum Efficiency of 38%, K. Kim et al, Chem. Mater., 28, 7505−7510 (2016); DOI: 10.1021/acs.chemmater.6b03428.
Organic Light-Emitting Diodes with 30% External Quantum Efficiency Based on a Horizontally Oriented Emitter, S. Kim et al., Adv. Funct. Mater., 23, 3896–3900 (2013); DOI: 10.1002/adfm.201300104.
Highly Effi cient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments, K. Kim et al., Adv. Mater., 26, 3844–3847 (2014); DOI: 10.1002/adma.201305733.
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