Tris-PCz has a tri-carbazole back-boned structure joined at the 3 and 6 positions. The highly-conjugated carbazoles makes Tris-PCz electron-rich, which is widely used as a hole-transport layer material in TADF-OLED devices.
Due to its electron-rich nature, Tris-PCz can form exciplexes with electron-deficient materials (such as B4PyPPM ) in highly-efficient OLED devices with TADF characteristics.
Tris-PCz has a high triplet energy (ET = 2.7 eV), so it is also frequently used as an exciton block layer material to effectively prevent the excitons' energy from being transferred (to the donor or acceptor) to achieve high fluorescence quantum efficiency.
General Information
CAS number
1141757-83-6
Full name
9-Phenyl-3,6-bis(9-phenyl-9Hcarbazol-3-yl)-9H-carbazole
Chemical formula
C54 H35 N3
Molecular weight
725.28 g/mol
Absorption
λmax 305 nm in DCM
Fluorescence
λmax 415 nm in DCM
HOMO/LUMO
HOMO = 5.6 eV, LUMO = 2.1 eV; T1 = 2.7 eV [1]
Synonyms
9,9',9''-Triphenyl-9H,9'H,9''H-3,3':6',3''-tercarbazole
Classification / Family
Carbazole derivative, Fluorescent host materials, Phosphorescent host materials, Hole-transport layer materials, Exciton-blocking layer materials, TADF-OLED materials, Organic electronics, Sublimed materials.
Product Details
Purity
Sublimed > 99% (HPLC)
Melting point
TGA: >270 °C (0.5% weight loss)
Appearance
White crystals/powder
Chemical Structure
Chemical structure of Tris-PCz
Device Structure(s)
Device structure
ITO/HATCN (10 nm)/Tris-PCz (35 nm)/10 wt.% 4CzPN:mCBP (G-EML) (3 nm)/6 wt.% 4CzPN:2 wt.% 4CzTPN-Ph:mCBP (R-EML) (2 nm)/10 wt.% 3CzTRZ:PPT (B-EML) (10 nm)/PPT (50 nm)/LiF (0.8 nm)/Al (100 nm) [2]
Colour
White
Max. Power Efficiency
30.3 lm W−1
Max. Current Efficiency
38.6 cd/A
Max. EQE
17.6%
Device structure
ITO/HATCN (10 nm)/Tris-PCz (35 nm)/10 wt.% 4CzPN:mCBP (G-EML) (5 nm)/6 wt.% 4CzPN:2 wt.% 4CzTPN-Ph:mCBP (R-EML) (4 nm)/10 wt.% 3CzTRZ:PPT (B-EML) (6 nm)/PPT (50 nm)/LiF (0.8 nm)/Al (100 nm) [2]
Colour
White
Max. Power Efficiency
34.1 lm W−1
Max. Current Efficiency
45.6 cd/A
Max. EQE
17.0%
Device structure
ITO/MoO3 (1 nm)/TAPC (20 nm)/Tris-PCz (10 nm)/Tris-PCz :B4PyPPM:3 wt% Ir(MDQ)2 acac (30 nm)/B4PyPPM (50 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour
Red
Max. Power Efficiency
37.3 lm W−1
Max. Current Efficiency
33.7 cd/A
Max. EQE
20.3%
Device structure
ITO (100 nm)/HATCN (10 nm)/Tris-PCz (30 nm)/mCBP (5 nm)/20 wt% of 3Ph2CzCzBN:mCBP (30 nm)/SF3-TRZ (10 nm)/ 30 wt% of Liq:SF3-TRZ (50 nm)/Liq (2 nm)/ Al (100 nm) [4]
Colour
Blue
Max. Power Efficiency
34.5 lm W−1
Max. Current Efficiency
41.7 cd/A
Max. EQE
17.9%
Device structure
ITO/TAPC (35 nm)/Tris-PCz (10 nm)/Tris-PCz :PIM-TRZ*(1:2) (30 nm)/PIM-TRZ (60 nm)/LiF (1 nm)/Al (100 nm) [5]
Colour
Green
Max. Power Efficiency
71.0 lm W−1
Max. Current Efficiency
52.0 cd/A
Max. EQE
18.6%
Device structure
ITO/4% ReO3 :Tris-PCz (60 nm)/Tris-PCz (15 nm)/Tris-PCz :CN-T2T(1:1) (25 nm)/CN-T2T (50 nm)/Liq (0.5 nm)/Al (100 nm) [6]
Colour
Green
Max. Power Efficiency
46.5 lm W−1
Max. Current Efficiency
37.0 cd/A
Max. EQE
11.9%
Max. Luminance
73, 800 cd/m2