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Product Code M2293A1
Price $297.00 ex. VAT

BSB, phosphorescent host for blue light-emitting materials

Used to improve device performance of OLEDs

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

BSB chemical structure
Chemical structure of 4,4'-di(triphenylsilyl)-biphenyl (BSB)

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 light emitting device Orange
EQE @ 100 cd/m2 22.7%
Current Efficiency @ 100 cd/m2 53.8 cd/A
Power Efficiency @ 100 cd/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 light emitting device Orange
EQE @ 100 cd/m2 17.2%
Current Efficiency @ 100 cd/m2 36.2 cd/A
Power Efficiency @ 100 cd/m2 28.6 Im/W


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2293A1 250 mg £270
Sublimed (>99.0% purity) M2293A1 500 mg £480
Sublimed (>99.0% purity) M2293A1 1 g £850

MSDS Documentation


Literature and Reviews

  1. 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.
  2. High Efficiency Very Low Color Temperature Phosphorescent Organic Light Emitting Diodes, S. Kumar et al., IPCSIT, 28, 117-121 (2012).
  3. 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.
  4. 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.
  5. 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.

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