Product Code M2191A1
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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


Chemical formula C54H35N3
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

Tris-PCz 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  white
Max. Power Efficiency 30.3 lm W1
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  white
Max. Power Efficiency 34.1 lm W1
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)2acac (30 nm)/B4PyPPM (50 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Red  red
Max. Power Efficiency 37.3 lm W1
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 blue
Max. Power Efficiency 34.5 lm W1
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 green
Max. Power Efficiency 71.0 lm W1
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 green
Max. Power Efficiency 46.5 lm W1
Max. Current Efficiency 37.0 cd/A
Max. EQE  11.9%
Max. Luminance 73, 800 cd/m2

*For chemical structure information, please refer to the cited references


Grade Order Code Quantity Price
Sublimed (>99% purity) M2191A1 100 mg £146
Sublimed (>99% purity) M2191A1 250 mg £293
Sublimed (>99% purity) M2191A1 500 mg £498
Sublimed (>99% purity) M2191A1 1 g £846

MSDS Documentation

Tris-PCz MSDSTris-PCz MSDS sheet

Literature and Reviews

  1. Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence, H. Nakanotani1 et al., Sci. Rep., 3, 2127 (2013); DOI: 10.1038/srep02127.
  2. High-efficiency white organic light-emitting diodes using thermally activated delayed fluorescence, J. Nishide et al., Appl. Phys. Lett. 104, 233304 (2014); doi: 10.1063/1.4882456.
  3. High-performance red organic light-emitting devices based on an exciplex system with thermally activated delayed fluorescence characteristic, S. Yuan et al., Org. Electronics, 39, 10-15 (2016); doi: 10.1016/j.orgel.2016.09.020.
  4. Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4, C. Chan et al., Nat. Commun., 9, 5036 (2018); DOI: 10.1038/s41467-018-07482-6.
  5. Exciplex-Based Electroluminescence: Over 21% External Quantum Efficiency and Approaching 100 lm/W Power Efficiency, B. Liang et al., J. Phys. Chem. Lett., 10, 2811−2816 (2019); DOI: 10.1021/acs.jpclett.9b01140.
  6. Balance the Carrier Mobility To Achieve High Performance Exciplex OLED Using a Triazine-Based Acceptor, W. Hung et al., ACS Appl. Mater. Interfaces, 8, 4811−4818 (2016); DOI: 10.1021/acsami.5b11895.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.