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.
General Information
CAS number
40491-34-7; 18856-08-1
Full name
1,4-Bis(triphenylsilyl)benzene
Chemical formula
C42H34Si2
Molecular weight
594.89 g/mol
Absorption
λmax 265 nm in DCM
Fluorescene
λem 298 nm in DCM
HOMO/LUMO
HOMO = 7.2 eV, LUMO = 2.8 eV (ET = 3.5 eV)
Synonyms
UGH2, 1,4-Phenylenebis(triphenylsilane)
Classification / Family
Organic electronics, Hole-blocking layer materials (HBL), TADF blue host materials, Blue PhOLEDs, TADF-OLEDs, Sublimed materials.
Product Details
Purity
Sublimed: >99.0% (HPLC)
Melting point
TGA: >270 °C (0.5% weight loss)
Colour
White powder/crystals
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.
*For chemical structure information, please refer to the cited references.
Pricing
Grade
Order Code
Quantity
Price
Sublimed (>99.0% purity)
M2131A1
100 mg
£189.00
Sublimed (>99.0% purity)
M2131A1
250 mg
£379.00
Sublimed (>99.0% purity)
M2131A1
500 mg
£636.00
Sublimed (>99.0% purity)
M2131A1
1 g
£1020.00
MSDS Documentation
UGH-2 MSDS sheet
Literature and Reviews
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.