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1,4-Bis(triphenylsilyl)benzene, known as UGH-2, is one of the well-known TADF host materials for blue-emitting dopants (such as FirPic) in highly-efficient blue PhOLEDs. This is due to its wide energy gap (4.4 eV) and high triplet energy (ET = 3.5 eV).
With a very deep HOMO energy level (HOMO = 7.2 eV), UGH-2 also works as an electron-transport (ETL) and hole-blocking layer (HBL) material.
λmax 265 nm in DCM
λem 298 nm in DCM
HOMO = 7.2 eV, LUMO = 2.8 eV (ET = 3.5 eV)
Classification / Family
Organic electronics, Hole-blocking layer materials (HBL), TADF blue host materials, Blue PhOLEDs, TADF-OLEDs, Sublimed materials.
High Efficiency White Organic Light-Emitting Devices Incorporating Yellow Phosphorescent Platinum(II) Complex and Composite Blue Host, S-L. Lai et al., Adv. Funct. Mater. 2013, 23, 5168–5176 (2013); DOI: 10.1002/adfm.201300281.
Iridium(III) Complexes of a Dicyclometalated Phosphite Tripod Ligand: Strategy to Achieve Blue Phosphorescence Without Fluorine Substituents and Fabrication of OLEDs, C-H. Lin et al., Angew. Chem., 123, 3240 –3244 (2011); DOI: 10.1002/ange.201005624 .
En Route to High External Quantum Efficiency (~12%), Organic True-Blue-Light-Emitting Diodes Employing Novel Design of Iridium (III) Phosphors, Y-C. Chiu et al., Adv. Mater., 21, 2221–2225 (2009); DOI: 10.1002/adma.200802546.
Deep-blue phosphorescent iridium complexes with picolinic acid N-oxideas the ancillary ligand for high efficiency organic light-emitting diodes, H-J. Seo et al., Org. Electron., 11, 564–572 (2010); doi: 10.1016/j.orgel.2009.12.014.
High efficiency blue phosphorescent organic light-emitting device, N. Chopra et al., Appl. Phys. Lett. 93, 143307 (2008); doi: 10.1063/1.3000382.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.