Charge Transport Layer Materials, High Purity Sublimed Materials, Hole Injection Layer Materials
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).
| 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 |
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| Classification / Family | Carbazole derivatives, Hole-injection layer materials, Hole-transporting layer materials, Phosphorescent host materials, Electron-blocking layer materials, Light-emitting diodes |
| Purity |
>99.5% (sublimed) >98.0% (unsublimed) |
|---|---|
| Melting point | 298~300 °C |
| Appearance | White powder/crystals |
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