Name: BCPO
SKU: 191139

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 (E_T ) of 3.01 eV and a high glass transition temperature (T_g) 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 and , 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	λ_max 292 nm in DCM
Fluorescence	λ_max 388 nm in DCM
HOMO/LUMO	HOMO = 5.76 eV, LUMO = 2.19 eV; E_T = 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	T_g = 137 °C
Appearance	White crystals/powder

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
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
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
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
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
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
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
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	[[price gbp="260"]]
Sublimed (>99% purity)	M2198A1	250 mg	[[price gbp="520"]]
Sublimed (>99% purity)	M2198A1	500 mg	[[price gbp="850"]]
Sublimed (>99% purity)	M2198A1	1 g	[[price gbp="1450"]]

MSDS Documentation

Literature and Reviews

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.
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.
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.

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.