4CzIPN-Me (2,4,5,6-Tetra(3,6-dimethylcarbazol-9-yl)-1,3-dicyanobenzene, CAS 1469703-61-4) is a thermally activated delayed fluorescence (TADF) material that emits in the yellow region. It can serve as the sole emitter in high-efficiency TADF-OLEDs or as an assistant dopant in TADF-assisted fluorescence (TAF) OLEDs, where a fluorescent end emitter sits alongside it in a host matrix.
Structurally, it is 4CzIPN carrying methyl groups at the 3,6-positions of each of its four carbazolyl units. These substituents improve both the stability and the solubility of the carbazolyl benzonitrile. It is an isomer of 4CzPN-Me and 4CzTPN-Me.
With a reverse intersystem crossing rate (k RISC) of around 10 6, 4CzIPN-Me converts triplets to singlets quickly, which suppresses exciton annihilation and has been shown to raise both electroluminescence efficiency and operational lifetime in TAF-OLEDs. In electrogenerated chemiluminescence studies, its ECL intensity falls over repeated voltage cycles because polymerization occurs on the carbazolyl groups. The material is supplied unsublimed at >98.0% purity (1H NMR) as an orange powder or crystals.
- Solo yellow emitter in high-efficiency TADF-OLED devices.
- Assistant dopant paired with a fluorescent end emitter such as TBRb in TAF (hyperfluorescent) OLEDs.
- Research into triplet-singlet upconversion and suppression of exciton annihilation in OLEDs.
- Electrogenerated chemiluminescence (ECL) studies of donor-acceptor TADF molecules.
| Brand | Ossila |
|---|---|
| CAS number | 1469703-61-4 |
| Molecular formula | C64H48N6 |
| Purity | Unsublimed >98.0% (1H NMR) |
| Category | — |
| Pack sizes | 250 mg, 500 mg, 1 g |
| Physical form | Orange powder/crystals |
| Storage | — |
- Product code: M2380B1
- Full Name: 2,4,5,6-Tetra(3,6-dimethylcarbazol-9-yl)-1,3-dicyanobenzene
- Synonyms: m4CzIPN
- Molecular Weight: 901.11 g/mol
- HOMO/LUMO: HOMO = 5.90 eV, LUMO = 2.81 eV
- Classification: Carbazole derivatives, Isophthalonitriles, TADF materials, Yellow dopant materials, Sublimed materials
- Device Max. EQE (solo emitter): 21%
- Device Max. Current Efficiency (solo emitter): 73 cd/A
- LT50@1,000 cd/m2 (with TBRb): 3775 h
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