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Product Code M2198A1-100mg
Price £260 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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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

Pricing

Grade Order Code Quantity Price
Sublimed (>99% purity) M2198A1 100 mg £260
Sublimed (>99% purity) M2198A1 250 mg £520
Sublimed (>99% purity) M2198A1 500 mg £850
Sublimed (>99% purity) M2198A1 1 g £1450

MSDS Documentation

BCPO MSDSBCPO MSDS sheet

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.
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