3DPA-DiKTa (3,7,11-Tris(diphenylamino)quinolino[3,2,1-de]acridine-5,9-dione, CAS 2759189-68-7) is a multiresonance thermally activated delayed fluorescence (MR-TADF) emitter that delivers pure red, narrowband emission for OLED research. Its structure places three electron-donating diphenylamine groups symmetrically on an electron-accepting acridine-5,9-dione (DiKTa) core, opposite the central nitrogen atom.
In 2 wt.% mCP doped films the material emits at 617 nm with a FWHM of 56 nm, a photoluminescence quantum efficiency of 60% and a small ΔEST of 0.20 eV. Because its transition dipole moments favour horizontal orientation, red OLEDs using it in the emissive layer reached a maximum EQE of 16.7% at 613 nm.
Pairing 3DPA-DiKTa with 4CzIPN as an assistant dopant in a hyperfluorescence device raised brightness and markedly reduced efficiency roll-off. The unsublimed grade is supplied as a deep red powder or crystals with purity ≥98.0% (HPLC).
- Narrowband red emissive dopant in OLED-TADF devices.
- Terminal emitter in hyperfluorescence OLEDs with 4CzIPN as assistant dopant.
- Research on multiresonance TADF materials based on DiKTa derivatives.
| Brand | Ossila |
|---|---|
| CAS number | 2759189-68-7 |
| Molecular formula | C56H38N4O2 |
| Purity | Unsublimed ≥98.0% (HPLC) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Deep red powder/crystals |
| Storage | — |
- Product code: M2514B1
- Molecular weight: 798.93 g/mol
- Absorption: λmax 554 nm (in toluene)
- Fluorescence: λem 617 nm (in film)
- HOMO/LUMO: HOMO = -5.13 eV, LUMO = -3.01 eV; ΔEST = 0.20 eV
- Melting point: 287-289 °C
- Max EQE (mCP host device): 16.7%
- Max EQE (4CzIPN hyperfluorescence device): 17.9%
- Max luminance (hyperfluorescence device): 46,003 cd m-2
—
—