TCTA
CAS Number 139092-78-7
Charge Transport Layer Materials, High Purity Sublimed Materials, Hole Injection Layer Materials, Hole Transport Layer Materials, Host Materials, Materials,
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] |
| Synonyms |
|
| Classification / Family | Carbazole derivatives, Hole-injection layer materials, Hole-transporting layer materials, Phosphorescent host materials, Electron-blocking layer materials, Light-emitting diodes |
Product Details
| Purity |
>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
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] |
|---|---|
| Color | White 
|
| 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] |
|---|---|
| Color | Blue 
|
| 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] |
|---|---|
| Color | Deep Blue 
|
| 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] |
|---|---|
| Color | Blue
|
| 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] |
|---|---|
| Color | White
|
| 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] |
|---|---|
| Color | Red 
|
| 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] |
|---|---|
| Color | Green 
|
| 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] |
|---|---|
| Color | White
|
| 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] |
|---|---|
| Color | Blue
|
| 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] |
|---|---|
| Color | White
|
| 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.
MSDS Documentation
TCTA MSDS sheetLiterature and Reviews
- 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).
- 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.
- 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.