m-MTDATA, or 4,4',4''-Tris[phenyl(m-tolyl)amino]triphenylamine (CAS 124729-98-2), is a triphenylamine derivative supplied as a sublimed powder for organic electronics. It is mainly used as the hole-injection buffer layer (HIL) in organic light-emitting diodes, where it helps holes pass from the ITO anode into the hole transporting layer (HTL).
Its very low solid-state ionization potential, together with its ability to form good-quality amorphous films, makes it well suited to this role and can help reduce the operating voltage of OLEDs. The material has a HOMO of 5.1 eV and a LUMO of 2.0 eV.
To raise the conductivity of the buffer layer, m-MTDATA is commonly p-doped with the strong electron acceptor F4-TCNQ, giving a typical stack of ITO/p-doped m-MTDATA/HTL. Reported devices built with m-MTDATA cover white, green, yellow, red and blue emission. Sublimation is used to reach ultra-pure grade material.
- Hole-injection buffer layer between the ITO electrode and the hole transporting layer in OLEDs.
- Host for p-doping with F4-TCNQ to improve the conductivity of the HTL buffer layer.
- Hole transporting material in organic light-emitting diodes of white, green, yellow, red and blue emission.
- Research on exciplex emission and charge-transfer states in organic donor–acceptor blends.
| Brand | Ossila |
|---|---|
| CAS number | 124729-98-2 |
| Molecular formula | C57H48N4 |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Yellow/white powder |
| Storage | — |
- Product code: M621
- Molecular weight: 789.02 g/mol
- Melting point: 210 °C
- Absorption: λmax 312 nm, 342 nm in THF
- Fluorescence: λem 425 nm in THF
- HOMO/LUMO: HOMO 5.1 eV, LUMO 2.0 eV
- Synonyms: 4,4',4''-Tris[(3-methylphenyl)phenylamino]triphenylamine
- Classification: Triphenylamine derivatives, Hole-injection materials, Hole transporting materials, Light-emitting diodes, Organic electronics
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