UGH-2
CAS Number 40491-34-7 / 18856-08-1
Electron / Hole Transport Layer Materials, High Purity Sublimed Materials, Host Materials, Materials, Semiconducting Molecules, TADF Materials
UGH2, ETL and HBL material for organic electronic devices
TADF host material for blue-emitting dopants in highly-efficient blue PhOLEDs
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 |
| Fluorescence | 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, see the sublimed materials.
Chemical Structure
Device Structure(s)
| 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.
Pricing
| Grade | Order Code | Quantity | Price |
|---|---|---|---|
| Sublimed (>99.0% purity) | M2131A1 | 100 mg | £250 |
| Sublimed (>99.0% purity) | M2131A1 | 250 mg | £500 |
| Sublimed (>99.0% purity) | M2131A1 | 500 mg | £850 |
| Sublimed (>99.0% purity) | M2131A1 | 1 g | £1300 |
MSDS Documentation
UGH-2 MSDS sheetLiterature 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.