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.
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. |
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.
Device structure | ITO/MoOx (5 nm)/NPB (40 nm)/TCTA (5 nm)/3% Y-Pt :mCP(20 nm)/8% FIrpic:UGH2 (20 nm)/TAZ (40 nm)/LiF (0.5 nm)/Al (100 nm) [1] |
Colour | White |
Max. Current Efficiency | 29.8 cd/A |
Max. EQE | 10.3% |
Max. Power Efficiency | 19.7 lm W-1 |
Device structure | ITO/MoOx (5 nm)/NPB (40 nm)/mCP(10 nm)/2% Y-Pt:8% FIrpic:UGH2 (20 nm)/TAZ (40 nm)/LiF (0.5 nm)/Al (100 nm) [1] |
Colour | White |
Max. Current Efficiency | 28.5 cd/A |
Max. EQE | 9.1% |
Max. Power Efficiency | 21.3 lm W-1 |
Device structure | ITO/MoO x (5 nm)/NPB (40 nm)/4% Y-Pt :TCTA (20 nm)/8%FIrpic:mCP(10 nm)/8% FIrpic:UGH2 (10 nm)/BAlq (40 nm)/LiF (0.5 nm)/Al (100 nm) [1] |
Colour | White |
Max. Current Efficiency | 45.6 cd/A |
Max. EQE | 16.0% |
Max. Power Efficiency | 35.8 lm W-1 |
Device structure | ITO/TAPC (30 nm)/TCTA (10 nm)/CzSi (3 nm)/CzSi doped with 4 wt% of 2c* (25 nm)/UGH2 doped with 4 wt% of 2c*(3 nm)/UGH2 (2 nm)/TmPyPB (50 nm)/LiF (0.8 nm)/Al (150 nm) [2] |
Colour | Blue |
Max. Current Efficiency | 22.3 cd/A |
Max. EQE | 11% |
Max. Power Efficiency | 16.7 Im/W |
Device structure | (ITO)/a-NPD (30 nm)/TCTA (20 nm)/CzSi (3 nm)/CzSi doped with 6 wt% [Ir(fppz)2(dfbdp)] (35 nm)/UGH2 doped with 6 wt% [Ir(fppz)2(dfbdp)] (3 nm)/UGH2 (2 nm)/BCP (50 nm)/Cs2CO3 (2 nm)/Ag (150 nm) [3] |
Colour | Blue |
Max. Current Efficiency | 11.4 cd/A |
Max. EQE | 11.9% |
Max. Power Efficiency | 7.9 Im/W |
Device structure | ITO/2-TNATA (30 nm)/TAPC (30 nm)/TCTA (10 nm)/mCP:8 wt.% (F2CF3Ch2ppy)2Ir(pic-N-oxide)* (20 nm)/UGH2:15 wt.% (F2CF3Ch2ppy)2Ir(pic-N-oxide) (10 nm)/BAlq (40 nm)/LiF (1 nm)/Al (100 nm) [4] |
Colour | Blue |
Max. Current Efficiency | 36.1 cd/A |
Max. EQE | 23.3% |
Max. Power Efficiency | 17.3 Im/W |
Device structure | ITO/TAPC (40 nm)/mCP (10 nm)/UGH2:10 wt.% FIrpic (20 nm)/ 3TPYMB (40 nm)/LiF (1 nm)/Al (100 nm) [5] |
Colour | Blue |
Max. Current Efficiency | 49 cd/A |
Max. EQE | 23% |
Max. Power Efficiency | 31.6 Im/W |
*For chemical structure information, please refer to the cited references.
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 |
UGH-2 MSDS sheet
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.
SouthernBiotech/Goat Anti-Human Lambda-Alexa Fluor® 555/2070-32/1.0 mg
vectorlabs/Biotinylated Aleuria Aurantia Lectin (AAL)/B-1395/1 mg
vectorlabs/VECTASTAIN® Elite® ABC-HRP Kit (Peroxidase, Mouse IgG)/PK-6102/1 kit
vectorlabs/VECTASTAIN® Elite® ABC-HRP Kit (Peroxidase, Universal)/PK-6200/1 kit
vectorlabs/Unconjugated Musa Paradisiaca (Banana) Lectin (BanLec)/L-1410/5 mg
GiottoBiotech/Calmodulin N60D/5 mg/G02CLM60cn