SpiroAC-TRZ (CAS 1980037-96-4) is a blue-emitting organic semiconductor for building high-efficiency OLEDs based on thermally activated delayed fluorescence (TADF). Its molecule joins a spiroacridine electron donor to a triazine electron acceptor through a covalent bond. It is supplied as a pale yellow powder of sublimed grade, >99% (HPLC).
The material combines a photoluminescence quantum yield close to 100% with a horizontal dipole ratio of up to 83%. A small singlet-triplet gap (ΔEST) of 0.072 eV lets reverse intersystem crossing proceed readily. In a multilayer device, SpiroAC-TRZ reached an external quantum efficiency of 36.7%.
As a third-generation OLED emitter, it also suits simplified single-layer blue devices. With the emitting layer placed between a PEDOT:PSS:PFI anode and a Ba/Al cathode, such a device delivered an EQE of 27.7% with little roll-off, still holding 23% at 1000 cd/m2.
- Emitting-layer dopant in blue TADF OLEDs.
- Fabrication of simplified single-layer blue OLEDs.
- Research on reverse intersystem crossing and TADF photophysics.
- Studies of horizontal dipole orientation for improved light outcoupling.
| Brand | Ossila |
|---|---|
| CAS number | 1980037-96-4 |
| Molecular formula | C46H30N4 |
| Purity | Sublimed >99% (HPLC) |
| Category | — |
| Pack sizes | 100 mg, 250 mg, 500 mg, 1 g |
| Physical form | Pale yellow powder |
| Storage | — |
- Product code: M2435A1
- Full Name: 10-(4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl)-10H-spiro[acridine-9,9'-fluorene]
- Molecular Weight: 638.76 g/mol
- Fluorescence: λmax = 479 nm (toluene)
- HOMO/LUMO: HOMO = −5.7 eV, LUMO = −3.1 eV
- Singlet-Triplet Gap (ΔEST): 0.072 eV
- Decomposition Temperature: Td = 353 °C
- Glass Transition Temperature: Tg = 155 °C
- Processing Solvents: Toluene
- Synonyms: SpiroAc-TRZ
- Device EQE (multilayer): 36.7%
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