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Product Code M2198A1
Price $258.00 ex. VAT

BCPO, bipolar host material

Universal host to blue, green and red fluorescent and phosphorescent devices

Bis-4-(N-carbazolyl)phenyl)phenylphosphine oxide - BCPO - is a bipolar host material containing phenylphosphine oxide as an electron withdrawing moeity and two carbazolyl groups as electron donating moieties. BCPO possesses a high triplet energy (ET ) of 3.01 eV and a high glass transition temperature (Tg) of 137 °C. The phosphine oxide moiety in the middle of the structure can effectively cut off the electron communication between the two N-phenyl carbazole groups, leading to a much higher triplet energy of BCPO than CBP.

Like CBP and mCBP, BCPO can be used as a universal host to blue, green and red fluorescent and phosphorescent devices using simple device architectures.

General Information

CAS number 1233407-28-7
Full name Bis-4-(N-carbazolyl)phenyl)phenylphosphine oxide
Chemical formula C42H29N2OP
Molecular weight 608.67 g/mol
Absorption λmax 292 nm in DCM
Fluorescence λmax 388 nm in DCM
HOMO/LUMO HOMO = 5.76 eV, LUMO = 2.19 eV; ET = 3.01 eV [1]
Synonyms 9,9′-(4,4′-(Phenylphosphoryl)bis-(4,1-phenylene))bis(9H-carbazole)
Classification / Family Carbazole derivatives, Bipolar host materials, Fluorescent host materials, Phosphorescent host materials, TADF materials, Organic printed electronics.

Product Details

Purity Sublimed > 99% (HPLC)
Melting point Tg = 137 °C 
Appearance White crystals/powder

Chemical Structure

BCPO chemical structure
Chemical structure of BCPO

Device Structure(s)

Device structure ITO/NPB (10 nm)/TCTA (20 nm)/BCPO:FIr6 (7–8%, 30 nm)/BCP (10nm)/Alq (50 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour Blue  blue
Max. Luminance 28,718 cd/m2
Max. Current Efficiency 36.8 cd/A 
Max. EQE 19.8%
Max. Power Efficiency 33.1 lm W-1
Device structure ITO/HATCN (4.2 nm)/TAPC (34 nm)/BCPO: 5 wt% p-AC-DBNA* (23 nm)/TmPyPB (21 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour Sky Blue  blue
Max. Luminance 28,600 cd/m2
Max. Current Efficiency 43.0 cd/A 
Max. EQE 19.3%
Max. Power Efficiency 42.3 lm W-1
Device structure ITO/HATCN (4.2 nm)/TAPC (34 nm)/BCPO: 5 wt% p-AC-DBNA* (23 nm)/TmPyPB (21 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour Green green
Max. Luminance 69,160 cd/m2
Max. Current Efficiency 54.4 cd/A 
Max. EQE 19.2%
Max. Power Efficiency 49.8 lm W-1
Device structure ITO/HATCN (4.2 nm)/TAPC (34 nm)/BCPO: 10 wt% m-AC-DBNA* (23 nm)/TmPyPB (21 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour Sky Blue  blue
Max. Luminance 24,600 cd/m2
Max. Current Efficiency 42.0 cd/A 
Max. EQE 17.1%
Max. Power Efficiency 34.1 lm W-1
Device structure ITO/NPB(40 nm)/TCTA(10 nm)/TAT-3DBTO2*:BCPO(1:9,30 nm)/TPBi(40 nm)/LiF(1 nm)/Al (100 nm) [3]
Colour Green green
Max. Luminance 10,420 cd/m2
Max. Current Efficiency 50.8 cd/A 
Max. EQE 30.9%
Max. Power Efficiency 38.7 lm W-1
Device structure ITO/NPB (20 nm)/ TCTA (10 nm)/BCPO:Ir(ppy)3 (8% 30 nm)/TPOTP (40 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour Green green
Max. Luminance 115,000 cd/m2
Max. Current Efficiency 97.6 cd/A 
Max. EQE 25.2%
Max. Power Efficiency 101 lm W-1
Device structure ITO/NPB (30 nm)/mCP (20 nm)/BCPO Firpic (8 wt%) (30 nm)/ TPOTP (40 nm)/LiF (1 nm)/Al (100 nm); [4]
Colour Sky Blue  blue
Max. Luminance 35,600 cd/m2
Max. Current Efficiency 49.1 cd/A 
Max. EQE 23.1%
Max. Power Efficiency 41.8 lm W-1
 *For chemical structure information, please refer to the cited references


 Grade Order Code Quantity Price
Sublimed (>99% purity) M2198A1 100 mg £198.00
Sublimed (>99% purity) M2198A1 250 mg £396.00
Sublimed (>99% purity) M2198A1 500 mg £636.00
Sublimed (>99% purity) M2198A1 1 g £1070.00

MSDS Documentation


Literature and Reviews

  1. A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs, H. Chou et al., Adv. Mater., 22, 2468–2471 (2010); DOI: 10.1002/adma.201000061.
  2. Isomeric Bright Sky-Blue TADF Emitters Based on Bisacridine Decorated DBNA: Impact of Donor Locations on Luminescent and Electroluminescent Properties, G. Meng et al., Adv. Optical Mater., 7, 1900130 (2019); DOI: 10.1002/adom.201900130.
  3. Triazatruxene: A Rigid Central Donor Unit for a D–A3 Thermally Activated Delayed Fluorescence Material Exhibiting Sub-Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs, P. L. dos Santos et al., Adv. Sci., 5, 1700989 (2018); DOI: 10.1002/advs.201700989.
  4. A high triplet energy, high thermal stability oxadiazole derivative as the electron transporter for highly efficient red, green and blue phosphorescent OLEDs, C-H. Shih et al., J. Mater. Chem. C, 3, 1491-1496 (2015); DOI: 10.1039/C4TC02348J.

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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