General Information
CAS number 57102-62-2
Full name 9,9'-Diphenyl-9H,9'H-3,3'-bicarbazole
Chemical formula C36 H 24 N 2
Molecular weight
484.59 g/mol
Absorption λmax 303 nm in DCM
Fluorescene
λ max 391, 408 nm in DCM
HOMO/LUMO HOMO 5.67 eV, LUMO 2.3 eV [1]
Classification / Family
Carbazole derivatives, Light-emitting diodes, Organic electronics, PHOLED host materials, Sublimed materials.
Product Details
Purity Sublimed 99.83% (HPLC)
Melting point
TGA: 340 °C (0.5% weight loss)
Tg
Appearance Off-white crystals/powder
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.
Chemical Structure of BCzPh; CAS No. 57102-62-2 .
Applications
9,9'-Diphenyl-9H,9'H-3,3'-bicarbazole (BCzPh), with two conjugated carbazole units, is an electron-rich host material used for phosphorescent organic light-emitting diodes (PHOLEDs). Being electron-rich, BCzPh is also used as an electron donor to form exciplexes either as an emitting layer or host material for highly-efficient fluorescent and phosphorescent OLED devices.
With the dimerisation of carbazoles (and thus the blocked 3 and 3') positions, BCzph can greatly reduce the host-host aggregation, causing excimer formation. With a higher Tg
Device structure
BCzPh :FIrpic (8%, 20 nm)/TmPyPB (50 nm)/Liq (2 nm)/Al (120 nm) [1]
Colour Blue
Max Current Efficiency 34.3 cd/A
Max EQE 14.4%
Max. Power Efficiency 32.5 lm W-1
Device structure ITO (130 nm)/ TAPC (40 nm)/BCzPh :FIrpic (11 w%, 10 nm)/ B3PyPB (50 nm)/ LiF (1 nm)/ Al (100 nm) [2]
Colour Blue
Current Efficiency@100 cd/m2 43.9 cd/A
Max EQE@100 cd/m2 19.8%
Power Efficiency@100 cd/m2 45.2 lm W-1
Device structure ITO (80 nm)/HAT-CN (10 nm)/TAPC (30 nm)/BCzPh (10 nm)/BCzPh :3P-T2T (30 nm; 2:1)/3P-T2T (70 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Green
Max EQE 11.7%
Max. Power Efficiency 44.9 lm W-1
Device structure ITO (80 nm)/HAT-CN (10 nm)/TAPC (30 nm)/BCzPh (10 nm)/ BCzPh :3PT2T:8 wt % Ir(ppy)2 (acac)/3P-T2T (70 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Green
Max EQE 25.8%
Max. Power Efficiency 143.4 lm W-1
Device structure ITO/MoO3 (3 nm)/TAPC (35 nm)/TCTA (5 nm)/BCzPh :10 w%FIrPic (20 nm)/TmPyPB (50 nm)/LiF (0.5 nm)/Mg:Ag (15:1, 120 nm) [4]
Colour Blue
Max Current Efficiency 23.8 cd/A
Max Luminescence 11,570 cd/m2
Max. Power Efficiency 22.1 lm W-1
Device structure ITO/MoO3 (3 nm)/TAPC (35 nm)/TCTA (5 nm)/BCzPh :7 w%PO-01 (20 nm)/TmPyPB (50 nm)/LiF (0.5 nm)/Mg:Ag (15:1, 120 nm) [4]
Colour Yellow
Max Current Efficiency 33.2 cd/A
Max Luminescence 26,740 cd/m2
Max. Power Efficiency 29.8 lm W-1
*For chemical structure information, please refer to the cited references
Literature and Reviews
Bipolar host materials for high efficiency phosphorescent organic light emitting diodes: tuning the HOMO/LUMO levels without reducing the triplet energy in a linear system, L. Cui et al., J. Mater. Chem. C, 1, 8177-8185 92013); DOI: 10.1039/C3TC31675K.
3,3′-Bicarbazole-Based Host Materials for High-Efficiency Blue Phosphorescent OLEDs with Extremely Low Driving Voltage, H. Sasabe et al., Adv. Mater., 24, 3212–3217 (2012); DOI: 10.1002/adma.201200848.
Lifetime of Fluorescent and Phosphorescent Organic Light-Emitting Diodes, C-J. Shih et al., ACS Appl. Mater. Interfaces, 10, 24090−24098 (2018); DOI: 10.1021/acsami.8b08281.
4, 6-Bis[3-(dibenzothiophen-2-yl)phenyl] pyrimidine bipolar host for bright, efficient and low efficiency roll-off phosphorescent organic light-emitting devices, J. Yu et al., Org. Electronics 38, 301-306 (2016); DIO: 10.1016/j.orgel.2016.09.002.
