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PPF, dibenzo[b,d]furan-2,8-diylbis(diphenylphosphine Oxide), contains an electron donating dibenzo[b,d]furan core and two electron deficient diphenylphosphine oxide units. Due to their electron deficient nature, both PPF and PPT can be used as electron transport layer materials, and in some cases, to form exciplex with electron deficient donors, i.e. TAPC as emitting layer materials in TADF-OLED devices.
PPF shows a high triplet energy (ET = 3.1 eV) and it also can be used as host material for effective triplet excitons confinement in the emissive layer. PPF could also be used as exciton blocking layer material.
Nanosecond-time-scale delayed fluorescence molecule for deep-blue OLEDs with small efficiency rolloff, J. Kim et al., Nature Commun., 11, 1765 (2020); DOI: 10.1038/s41467-020-15558-5.
Blue organic light-emitting diodes realizing external quantum efficiency over 25% using thermally activated delayed fluorescence emitters, T. Miwa et al., SCi. Report, 7, 284 (2017); DOI:10.1038/s41598-017-00368-5.
An Isonicotinonitrile-based Blue Thermally Activated Delayed Fluorescence Emitter, I. Park et al., Chem. Lett., 49, 210–213 (2020); DOI:10.1246/cl.190808.
Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence, I. Park et al., Chem. Sci., 8, 953 (2017); DOI: 10.1039/c6sc03793c.
Bluish green emission from pyrene-pyrazoline containing heterocyclic materials and their electronic properties, A. Karuppusamy et al., J. Luminescence, 194, 718-728 (2017); DOI: 10.1016/j.jlumin.2017.09.042.
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