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2,2'-bis(4-(carbazol-9-yl)phenyl)-biphenyl (BCBP) has a bridged biphenyl structure with two electron rich carbazolyl pendant moieties. The bridged structure is believed to enhance the conjugation and raise the HOMO energy level, facilitating hole-injection and leading to low turn-on voltages in organic photoelectroluminescent devices.
Comparing with 4,4′-(bis(9-carbazolyl))biphenyl (CBP), a well known host material, BCBP is thermally more stable with a high glass transition temperature (Tg) of 173 °C, while CBP has a relatively low Tgof 69 °C.
Carbazolyl groups are largely embedded in both fluorescent and phosphorescent host materials because of their higher triplet energy levels and higher hole mobility. Like the rest of the family members such as CDBP and mCBP, BCBP is commonly used as host material for blue, green, red phosphorescent dopants for highly efficient OLED devices.
General Information
CAS number
858131-70-1
Full name
2,2'-bis(4-(carbazol-9-yl)phenyl)-biphenyl
Chemical formula
C48H32N2
Molecular weight
636.78 g/mol
Absorption
λmax 325 nm in DCM
Fluorescence
λem 373 nm in DCM
HOMO/LUMO
HOMO = 6.1 eV, LUMO = 2.6 (Eg = 3.5 eV; ET = 2.8 eV)
Synonyms
2,2'-bis(4-carbazolylphenyl)-1,1'-biphenyl
Classification / Family
Organic electronics, Hole transport layer materials (HTL), Fluorescent and phosphorescent host materials, TADF-OLEDs, Sublimed materials.
Product Details
Purity
Sublimed >99.0% (HPLC)
Melting point
Tg = 173 °C (lit.)
TGA: >330 °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.
Nearly 100% Internal Quantum Efficiency in an Organic Blue-Light Electrophosphorescent Device Using a Weak Electron Transporting Material with a Wide Energy Gap, L Xiao et al., Adv. Mater., 21, 1271–1274 (2009); DOI: 10.1002/adma.200802034.
Diarylmethylene-bridged 4,4′-(bis(9-carbazolyl))biphenyl: morphological stable host material for highly efficient electrophosphorescence, Z. Jiang et al., J. Mater. Chem., 19, 7661-7665 (2009); DOI: 10.1039/B910247G.
Towards Highly Efficient Blue-Phosphorescent Organic Light-EmittingDiodes with Low Operating Voltage and Excellent Efficiency Stability, C. Han et al., Chem. Eur. J., 17, 445 – 449 (2011); DOI: 10.1002/chem.201001981.
Organic host materials for phosphorescent organic light-emitting diodes, Y. Tao et al., Chem. Soc. Rev., 40, 2943-2970 (2011); DOI: 10.1039/C0CS00160K.
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.
BCBP MSDS sheet