4CzBN is a well-known benzonitrile based sky-blue TADF fluorescence emitter with four bulky carbazolyl groups evenly distributed on the benzene ring next to a nitrile group. The absence of any bulky group at the 4-position for 4CzBN, however, still produces the twisting of the carbazolyl groups at 3- and 5-positions.
Comparing with non-polar 4CzTPN which is symmetric in structure, 4CzBN has one less nitrile group leading to a lower charge carrier balance.
|Molecular weight||763.9 g/mol|
|Absorption||λmax 334 nm, 403 nm in toluene|
|Fluorescene||λem 443 nm in toluene|
|HOMO/LUMO||HOMO = 5.79 eV, LUMO = 2.75 eV, T1 = 2.66 eV |
|Classification / Family||Carbazole, Phthalonitrile, TADF materials, Blue dopant materials, Sublimed materials|
|Purity||Sublimed >99.0% (1H NMR)|
|Melting point||Td = 455 °C (0.5% weight loss), Tg = 316 °C (lit.)
*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.
|Device structure||ITO (100 nm)/HATCN (10 nm)/Tris-PCz (30 nm) mCBP (5 nm)/15 wt.% 4CzBN:mCBP (30 nm)/T2T (10nm)/BPy-TP2 (40 nm)/ LiF (0.8 nm)/ Al (100 nm) |
|Max. Current Efficiency||26.6 cd/A|
|Max. Power Efficiency||20.9 Im/W|
*For chemical structure information, please refer to the cited references.
|Sublimed (>99.0% purity)||M2104A1||250 mg||£315.00|
|Sublimed (>99.0% purity)||M2104A1||500 mg||£535.00|
|Sublimed (>99.0% purity)||M2104A1||1 g||£857.00|
Literature and Reviews
- Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIE y below 0.4, C. Chan et al, Nat. Commun., 9:5036 (2018); DOI: 10.1038/s41467-018-07482-6.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.