3TPA-DiKTa is a multiple resonance thermally activated delayed fluorescence (MR-TADF) green emitter with three electron donating triphenylamine (TPA) units attached at the opposite positions to the central nitrogen of the quinolino[3,2,1-de]acridine-5,9-dione (DiKTa) core.
TADF device based on 3TPA-DiKTa shows very high EQEmax of 30.8% at 552 nm (FWHM of 62 nm) when doped into 1,3-bis(N-carbazolyl) benzene (mCP), a maximum current efficiency (CEmax) of 117 cd/A, and maximum power efficiency (PEmax) of 108 lm W at 1.45 cd m-2.
When 4CzIPN is used as an assistant dopant, hyperfluorescence (HF) device based on 3TPA-DiKTa shows significantly improved efficiency roll-off and higher brightness. TADF-sensitized-fluorescence HF device demonstrates higher maximum luminance of 112,190 cd m-2 with low efficiency roll-off.
MR-TADF red emitter 3DPA-DiKTa and blue emitter Mes3DiKTa are also available in sublimed grade.
| CAS Number | N/A |
|---|---|
| Chemical Formula | C74H50N4O2 |
| Molecular Weight | 1027.21 g/mol |
| Absorption | λmax 494 nm (in toluene) |
| Fluorescence | λem 551 nm (in film) |
| HOMO/LUMO | HOMO = - 5.27 eV, LUMO = - 2.98 eV; ΔEST = 0.13 eV [1] |
| Synonyms | 3,7,11-Tris(4-(diphenylamino)phenyl)quinolino[3,2,1-de]acridine-5,9-dione |
| Classification or Family | DiKTa derivatives, Triphenylamines (TPA), Green dopant, Multiresonance thermally activated delayed fluorescent (MR-TADF), Sublimed materials. |
| Purity | Sublimed* >99% (HPLC) |
|---|---|
| Melting Point | Mp > 400 °C |
| Appearance |
Bright yellow powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.
3TPA-DiKTa chemical structure
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