T2T, or 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine, is a sublimed organic semiconductor from Ossila, supplied at >99.0% purity (HPLC) as an off-white powder or crystals. It is a common choice as a host for phosphorescent OLEDs and as an electron transport layer (ETL) material in TADF-OLEDs.
Its structure combines an electron-withdrawing triazine centre with three electron-rich biphenyl arms. Because the molecule is electron-deficient, T2T and related derivatives also act as acceptors that form exciplexes in blue-emitting TADF devices. Reported energy levels are HOMO 6.5 eV and LUMO 3.0 eV, with a triplet energy (T1) of 2.80 eV.
Sublimation purification gives an ultra pure grade suited to vacuum-deposited device work. In published green devices using T2T as host, a maximum EQE of 17.5% and power efficiency of 65.2 lm/W have been reported, and a green TADF device with a T2T layer reached a maximum EQE of 21%.
- Host material for the emissive layer of phosphorescent OLEDs (PHOLEDs).
- Electron transport layer material in TADF-OLEDs.
- Acceptor component for exciplex formation in blue-emission TADF devices.
- Interlayer or blocking layer in green and yellow TADF OLED stacks.
| Brand | Ossila |
|---|---|
| CAS number | 1201800-83-0 |
| Molecular formula | C39H27N3 |
| Purity | Sublimed >99.0% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Off-white powder/crystals |
| Storage | — |
- Product code: M2103A1
- Molecular Weight: 537.65 g/mol
- Thermal Stability: TGA: >300 °C (0.5% weight loss)
- Absorption: λmax 270 nm in DCM
- Fluorescence: λem 380 nm in DCM
- HOMO / LUMO: HOMO = 6.5 eV, LUMO = 3.0 eV
- Triplet Energy (T1): 2.80 eV
- Classification: Triazine, TADF host materials, PHOLEDs, Sublimed materials
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