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Product Code M2194A1-100mg
Price $300 ex. VAT

BCBP, host material for blue, green, red phosphorescent dopants for highly efficient OLED devices

High-purity (>99.0%) and available online for priority dispatch

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 Tg of 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.

* Measurable with an optical spectrometer, see our spectrometer application notes.

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, see sublimed materials.

Chemical Structure

Chemeical structure of bcbp, 858131-70-1
Chemical structure of BCBP

Device Structure(s)

Device structure ITO/TPDPES:TBPAH (20 nm)/BTPD (20 nm)/BCBP:15%FIrpic (30 nm)/DPPS (30 nm)/LiF (0.5 nm)/Al (100 nm) [1]
Colour Blue blue light emitting device
Max. Luminance 10,578 cd/m2
Max. Current Efficiency 50.5 cd/A 
Max. EQE 22.0%
Max. Power Efficiency 47.0 lm W-1
Device structure ITO/MoO3/TAPC/Ir(dpm)(piq)2(4%):BSB/Eu(TTA)3Phen*(0.3%):Ir(dpm)(piq)2(4%):BCBP/TPBi/LiF/Al
Colour Red red light emitting device
Max. Luminance 63,110 cd/m2
Max. Current Efficiency 61.71 cd/A 
Max. Power Efficiency 64.59 lm W-1
Device structure ITO/MoO3/TAPC/mer-Ir(Pmb)3(9%):BSB/Tm(acac)3Phen*(0.3%):mer-Ir(Pmb)3(9%):BCBP/TPBi/LiF/Al
Colour Blue blue light emitting device
Max. Luminance 20,095 cd/m2
Max. Current Efficiency 30.08 cd/A 
Max. Power Efficiency 37.56 lm W-1
Device structure ITO/MoO3/TAPC/Ir(ppy)2(m-bppy)(9%):Ir(piq)2(acac)(3%):BSB/Tm(acac)3Phen(0.3%):mer-Ir(pmb)3(25%):BCBP/TPBi/LiF/Al
Colour White white light emitting device
Max. Luminance 43,122 cd/m2
Max. Current Efficiency 60.55 cd/A 
Max. Power Efficiency 63.18 lm W-1


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2194A1 100 mg £240
Sublimed (>99.0% purity) M2194A1 250 mg £480
Sublimed (>99.0% purity) M2194A1 500 mg £800
Sublimed (>99.0% purity) M2194A1 1 g £1400

MSDS Documentation


Literature and Reviews

  1. 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.
  2. 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.
  3. 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.
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