4CzFCN
4CzFCN, high purity TADF blue emitting material
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4CzFCN, 2,3,4,6-Tetra(9H-carbazol-9-yl)-5-fluorobenzonitrile, has a similar structure to 4CzIPN, with the only difference that one of the cyano groups is replaced by a fluorine atom. The presence of fluorine atom promotes hydrophobicity and increases the solubility, and as a result, 4CzFCN can be solution processed in most of the aromatic solvents.
The weaker electron-withdrawing ability of fluorine compared to nitrile blue-shifts the emission, thus 4CzFCN is a TADF blue emitting material while 4CzIPN is green emitting. Calculated PLQY in 10 wt% CzSi host is 100% for 4CzFCN, with a small ΔEST of 0.06 eV.
General Information
| CAS number | 1819362-10-1 |
|---|---|
| Full name | 2,3,4,6-Tetra(9H-carbazol-9-yl)-5-fluorobenzonitrile |
| Chemical formula | C55H32FN5 |
| Molecular weight | 781.87 g/mol |
| Absorption* | λmax 307 nm in THF |
| Fluorescence | λem 471 nm in film |
| HOMO/LUMO | HOMO = 6.31 eV, LUMO = 3.49 eV [1] |
| Synonyms | 2,3,4,6-tetrakis(9H-carbazole-9-yl)−5-fluorobenzonitrile |
| Classification / Family | Carbazole, TADF blue emitter materials, Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials |
* Measurable with an Optical Spectrometer, see our spectrometer application notes.
Product Details
| Purity | Sublimed >99.0% (HPLC) |
|---|---|
| Melting point | Tg = 179 ℃ |
| Appearance | Deep yellow powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.
Chemical Structure
Device Structure(s)
| Device structure | ITO/PEDOT:PSS (30 nm)/PVK (15 nm)/CDBP:25% 4CzFCN (30 nm)/PO-T2T (50 nm)/LiF (0.8 nm)/Al (100 nm) [1] |
|---|---|
| Colour |
 Blue |
| Max. Current Efficiency | 55.3 cd/A |
| Max. EQE | 20.8% |
| Max. Power Efficiency | 38.6 Im/W |
Pricing
| Grade | Order Code | Quantity | Price |
|---|---|---|---|
| Sublimed (>99.0% purity) | M2331A1 | 100 mg | £200 |
| Sublimed (>99.0% purity) | M2331A1 | 250 mg | £400 |
| Sublimed (>99.0% purity) | M2331A1 | 500 mg | £700 |
| Sublimed (>99.0% purity) | M2331A1 | 1 g | £1150 |
MSDS Documentation
4CzFCN MSDS Sheet
Literature and Reviews
- 20% External Quantum Efficiency in Solution-Processed Blue Thermally Activated Delayed Fluorescent Devices, Y. Cho et al., Adv. Funct. Mater., 25 (43), 6786-6792 (2015); DOI: 10.1002/adfm.201502995.
- Blue and White Solution-Processed TADF-OLEDs with Over 20% EQE, Low Driving Voltages and Moderate Efficiency Decline based on Interfacial Exciplex Hosts, Z. He et al., J. Mater. Chem. C, 7, 11806-11812 (2019); DOI: 10.1039/C9TC03468D.
- Purely Organic Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes, M. Wong et al., Adv. Mater., 29 (22), 1605444 (2017); DOI: 10.1002/adma.201605444..
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.