CBP, 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl, is one of the most widely-used host materials for efficient fluorescent and phosphorescent organic light-emitting diodes with high hole mobility. This is due to its electron-rich property from two carbazolyl units.

It has been demonstrated that CBP can efficiently host green, yellow and red phosphorescent emitters with triplet energies smaller than that of CBP (ET = 2.6 eV) [1].

General Information

Product Details

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials page.

Chemical Structure

Device Structure(s)

Device structure	ITO/MoO3 (3 nm)/CBP: 20 wt% Ir(ppy)3: 4 wt% FIrpic (30 nm)/TAZ (50 nm) [8]
Colour	Green
Max. Luminance	27,524 cd/m2
Max. Current Efficiency	71.2 cd/A

Device structure	ITO /TAPC/(1wt% DPB:99wt% tri-PXZ-TRZ*):CBP (15:85)/LiF/Al [6]
Colour	Red
Max EQE	17.5%
Max. Power Efficiency	28 lm W−1

Device structure	ITO/MO3 (1 nm)/CBP (35 nm)/8 wt% Ir(ppy)2(acac):CBP/TPBi (65 nm)/LiF/Al (100 nm) [7]
Colour	Green
EQE at 100 cd/m2	23.4
Current Efficiency at 100 cd/m2	81 cd/A
Power Efficiency at 100 cd/m2	78.0 lm W−1

Device structure	ITO/MoOx (2 nm)/m-MTDATA: MoOx (30 nm, 15 wt.%)/m-MTDATA (10 nm)/Ir(ppz)3(10 nm)/CBP:PO-01* (3 nm, 6 wt.%)/Ir(ppz)3 (1 nm)/DBFDPOPhCz*:FIrpic (10 nm,10 wt.%)/Bphen (36 nm)/LiF (1 nm)/Al [9]
Colour	White
Max. EQE	12.2%
Max. Current Efficiency	42.4 cd/A
Max. Power Efficiency	47.6 lm W−1

Device structure	ITO/NPB (30 nm)/CBP:8 wt% (t-bt)2Ir(acac)* (15 nm)/BPhen(35 nm)/LiF (1 nm)/CoPc:C60 (4:1) (5 nm)/MoO3(5 nm)/NPB(30 nm)/CBP:8 wt% (t-bt)2Ir(acac)* (15 nm)/BPhen (35 nm)/Mg:Ag (100 nm) [10]
Colour	Yellow
Max. EQE	16.78%
Max. Luminance	42,236 cd/m2
Max. Current Efficiency	50.2 cd/A
Max. Power Efficiency	12.9 lm W−1

Device structure	ITO/NPD* (40 nm)/9%-Ir(piq)3:CBP (20 nm)/BPhen (50 nm)/KF (1 nm)/Al [11]
Colour	Red
Max. Luminance	11,000 cd/m2
Max EQE	10.3%
Max. Power Efficiency	8.0 lm W−1

Device structure	ITO/0.4 wt% F4TCNQ doped α NPD (30 nm)/ 5 wt% Ir(ppy)3 doped CBP (50 nm)/BPhen (30 nm)/20 wt% TCNQ mixed BPhen (1.5 nm)/Al [12]
Colour	Green
Luminance at 15 V	1,320 cd/m2
Power Efficiency at 14 V	56.6 lm W−1
Current Efficiency at 14 V	23.17 cd/A

Device structure	ITO/F4TCNQ (3 nm)/MeO-Spiro-TPD (27 nm)/CBP + BCzVbi* (50 nm)/BPhen (10 nm)/TCNQ mixed BPhen (1.5 nm)/Al [13]
Colour	Red
Luminance at 10 mA/cm2	1,790 cd/m2
Power Efficiency at 10 mA/cm2	4.65 lm W−1
Current Efficiency at 10 mA/cm2	18.0 cd/A