BSB
BSB, 4,4'-di(triphenylsilyl)-biphenyl, has a structure of two triphenyllsilanes joined by a biphenyl spacer. The other family member, UGH-2, has a phenyl spacer.
Having a deep HOMO energy level and a wide bandgap, BSB is normally used as phosphorescent host for blue light-emitting materials such as FIrPic. When compared to UGH-2, it has higher glass transition temperature (Tg = 100 °C) to afford better morphology of OLED device films for higher device performance and stability. Electroluminescence devices using FIrpic as the blue phosphorescence dopant and UGH2, BSB, and BST (4,4″-bis(triphenylsilanyl)-(1,1′,4′,1″)-terphenyl) as the hosts show that BSB provides best device performance.
General Information
| CAS number | 18826-13-6 |
| Chemical formula | C48H38Si2 |
| Molecular weight | 670.99 g/mol |
| Absorption | λmax 271 nm (dichloromethane) |
| Photoluminescence | λem 432 nm (dichloromethane) |
| HOMO/LUMO | HOMO = 6.5 eV, LUMO = 2.3 eV; ET = 2.76 eV [1] |
| Chemical name | 4,4'-Di(triphenylsilyl)-biphenyl |
| Synonyms | 4,4'-bis-triphenylsilanyl-biphenyl, 4,4'-di(triphenylsilyl)-biphenyl |
| Classification / Family | Arylsilane derivatives, Phosphorescent host materials, Electron transport materials, Hole blocking layer materials, Sublimed materials, Semiconducting small molecules |
Product Details
| Purity | Sublimed >99.0% (HPLC) |
| Melting point | Tg = 100 °C (lit.) |
| Appearance | 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.
Chemical Structure
Device Structure(s)
| Device structure | ITO (125 nm)/PEDOT:PSS (35 nm)/CBP:16 wt% FIrpic (10 nm)]/BSB:Spiro-2CBP (3 nm)/Spiro-2CBP:4wt % Ir(2-phq)3 (5 nm)/TPBi (32 nm)/LiF (1 nm)/Al (150 nm) [2] |
| Colour | Orange 
|
| EQE@100cd/m2 | 22.7% |
| Current Efficiency@100cd/m2 | 53.8 cd/A |
| Power Efficiency@100cd/m2 | 36.0 Im/W |
| Device structure | ITO (125 nm)/PEDOT:PSS (35 nm)/CBP (10 nm)]/BSB:Spiro-2CBP (3 nm)/Spiro-2CBP:4wt % Ir(2-phq)3 (5 nm)/TPBi (32 nm)/LiF (1 nm)/Al (150 nm) [2] |
| Colour | Orange |
| EQE@100cd/m2 | 17.2% |
| Current Efficiency@100cd/m2 | 36.2 cd/A |
| Power Efficiency@100cd/m2 | 28.6 Im/W |
Pricing
| Grade | Order Code | Quantity | Price |
| Sublimed (>99.0% purity) | M2293A1 | 250 mg | £229.00 |
| Sublimed (>99.0% purity) | M2293A1 | 500 mg | £399.00 |
| Sublimed (>99.0% purity) | M2293A1 | 1 g | £699.00 |
MSDS Documentation
BSB MSDS sheetLiterature and Reviews
- Interlayer Engineering with Different Host Material Properties in Blue Phosphorescent Organic Light-Emitting Diodes, J. Lee et al., ETRI J., 33 (1), 32-38 (2011); DOI: 10.4218/etrij.11.0110.0172.
- High Efficiency Very Low Color Temperature Phosphorescent Organic Light Emitting Diodes, S. Kumar et al., IPCSIT, 28, 117-121 (2012).
- White Organic Light-Emitting Diodes Utilized by Near UV-Deep Blue Emitter and Exciplex Emission, Y. Park et al., J. Nanosci. Nanotechnol., 11 (2); 1381–1384 (2011); DOI: 10.1166/jnn.2011.3376.
- Functionalization of phosphorescent emitters and their host materials by main-group elements for phosphorescent organic light-emitting devices, X. Yang et al., Chem. Soc. Rev., 44, 8484-8575 (2015); DOI: 10.1039/C5CS00424A.
- Yellow/Orange Emissive Heavy-Metal Complexes as Phosphors in Monochromatic and White Organic Light-Emitting Device, C. Fan et al., Chem. Soc. Rev., 43, 6439-6469 (2014); DOI: 10.1039/C4CS00110A.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.