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Product Code M471-500mg
Price £165 ex. VAT

TCTA, HTL and HIL material in LEDs and perovskite solar cells

Popular host material for green, red and white PhOLEDs

Having three carbazole units as the pendants and triarylamine at the core, tris(4-carbazoyl-9-ylphenyl)amine (TCTA) is electron-rich. As a result, it is widely used as a hole-transport and hole-injection material in light-emitting diodes and perovskite solar cells. With low electron mobility, TCTA has also been used as exciton/electron blocking layer materials because of its high lying LUMO energy level (LUMO = 2.4 eV).

TCTA is also a very popular phosphorescent host material due to its large band gap (Eg = 3.4 eV) for green, red and white phosphorescent organic light-emitting diodes (PhOLEDs).

General Information

CAS number 139092-78-7
Chemical formula C54H36N4
Molecular weight 740.89 g/mol
Absorption λmax 293 and 326 nm (THF)
Fluorescence λem 385 nm (THF)
HOMO/LUMO HOMO = 5.83 eV, LUMO = 2.43 eV [1]
  • TCTA, 4,4',4"-Tris(carbazol-9-yl)triphenylamine
  • Tris(4-carbazoyl-9-ylphenyl)amine
Classification / Family Carbazole derivatives, Hole-injection layer materials, Hole-transporting layer materials, Phosphorescent host materials, Electron-blocking layer materials, Light-emitting diodes

Product Details


>99.5% (sublimed)

>98.0% (unsublimed)

Melting point 298~300 °C
Appearance White powder/crystals

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

Chemical Structure

tcta chemical stucture
Chemical Structure of Tris(4-carbazoyl-9-ylphenyl)amine (TCTA)

Device Structure(s)

Device structure ITO/MoO3 (8 nm)/(NPB)(80 nm)/TAPC(5 nm)/TCTA:4 wt% Ir(MDQ)2(acac) (4 nm)/TCTA:2 wt% Ir(ppy)3 (4 nm)/43 wt% TCTA: 43 wt% 26DCzPPy: 14 wt% FIrpic (5 nm)/TmPyPb (40 nm)/LiF/Al [1]
Colour White white light emitting device
Max. EQE 19.4%
Max. Current Efficiency 43.6 cd/A
Max. Power Efficiency 45.8 lm W−1
Device structure ITO/PEDOT:PSS/TCTA:TPOB:10 wt % FIrpic/TmPyPB/Cs2CO3/Al [2]
Colour Blue blue light emitting device
Max. EQE 13.8%
Max. Current Efficiency 28.2 cd/A
Max. Power Efficiency 22 lm W−1
Device structure ITO/NPB (40 nm)/TCTA (20 nm)/TPA-C-TPA (30 nm)/TPBi (20 nm)/LiF (1 nm)/Al (200 nm) [3]
Colour Deep Blue deep blue light emitting device
EQE@10 mA/ cm2 4.83%
Current Efficiency@10 mA/ cm2 3.18 cd/A
Power Efficiency@10 mA/ cm2 2.03 lm W−1
Device structure ITO/PEDOT:PSS (25 nm)/TCTA:POPH:10 wt% FIrpic (35 nm)/TPBI (35 nm)/Ca (10 nm)/Ag [4]
Colour Blue blue light emitting device
Max. Luminance 40,000 cd/m2
Max. Current Efficiency 25.8 cd/A
Max. Power Efficiency 22.5 lm W−1
Device structure ITO/PEDOT:PSS(40 nm)/TCTA:TAPC:FIrpic:Ir(ppy)3:Ir(MDQ)2(acac) (40nm)/TmPyPB (50 nm)/LiF (1 nm)/Al [5]
Colour White white light emitting device
Max. Current Efficiency 37.1 cd/A
Max. Power Efficiency 32.1 lm W−1
Device structure ITO/MoO3 (3nm)/NPB (20nm)/TCTA (8nm)/TCTA:3P-T2T (1:1): 1.0 wt% DCJTB (15nm)/3P-T2T (45nm)/LiF (1nm)/Al [6]
Colour Red red light emitting device
MAX. EQE 10.15%
Max. Luminance 22, 767 cd/m2
Max. Current Efficiency 22.7 cd/A
Max. Current Efficiency 21.5 lm W−1
Device structure ITO/PEDOT:PSS/α-NPD (20 nm)/TCTA (5 nm)/T2T*:(PPy)2Ir(acac)(9:1 wt%) (25 nm)/TAZ (50 nm)/LiF (0.5 nm)/Al (100 nm) [7]
Colour Green green light emitting device
Max. Luminance 85,000 cd/m2
Max. Current Efficiency 54 cd/A
Max. EQE 17.4%
Max. Power Efficiency 48 lm W−1
Device structure ITO/HATCN (5 nm)/NPB (40 nm)/TCTA (10 nm)/mCP:6 wt%2CzPN (11 nm)/TAZ:4 wt% PO-01 (4 nm)/TAZ (40 nm)/LiF (0.5 nm)/Al (150 nm) [8]
Colour White white light emitting device
Max. EQE 38.4%
Max. Power Efficiency 80.1 lm W−1
Device structure ITO/EHI608/TCTA/TCTA:3TP:Firpic (1:1:0.17)/3TPYMB/Al [9]
Colour Blue blue light emitting device
Max Power Efficiency 27.5 lm W-1
Max. Current Efficiency 36.0 cd/A
Device structure ITO/MoOx (5 nm)/NPB (40 nm)/4% Y-Pt*:TCTA (20 nm)/8% FIrpic:mCP(10 nm)/8% FIrpic:UGH2 (10 nm)/BAlq (40 nm)/LiF (0.5 nm)/Al (100 nm) [10]
Colour White white light emitting device
Max. EQE 16.0%
Max. Current Efficiency 45.6 cd/A
Max. Power Efficiency 35.8 lm W−1

*For chemical structure informations please refer to the cited references.

When fabricating devices, processing and handling materials in a glove box helps maintain their purity and maintain efficiency by avoiding contamination from particulates, moisture, and airborne impurities.


Grade Order Code Quantity Price
Sublimed (>99.5% purity) M471 500 mg
Unsublimed (>98.0% purity) M472 1 g £115
Sublimed (>99.5% purity) M471 1 g £240

MSDS Documentation


Literature and Reviews

  1. High-Efficiency Phosphorescent White Organic Light-Emitting Diodes with Stable Emission Spectrum Based on RGB Separately Monochromatic Emission Layers, Q. Zhang et al., Chin. Phys. Lett., 31 (4) 046801 (2014).
  2. Enhanced Electron Affinity and Exciton Confinement in ExciplexType Host: Power Efficient Solution-Processed Blue Phosphorescent OLEDs with Low Turn-on Voltage, X. Ban et al., ACS Appl. Mater. Interfaces, 8, 2010-2016 (2016); DOI: 10.1021/acsami.5b10335.
  3. Highly efficient emitters of ultra-deep-blue light made from chrysene chromophores, H. Shin et al., J. Mater. Chem. C, 2016, Advance Article; DOI: 10.1039/C5TC03749B.

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