4CzFCN
CAS Number 1819362-10-1
Dopant Materials, High Purity Sublimed Materials, Semiconducting Molecules, TADF Materials
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 being 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.
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 | £220 |
| Sublimed (>99.0% purity) | M2331A1 | 250 mg | £440 |
| Sublimed (>99.0% purity) | M2331A1 | 500 mg | £760 |
| Sublimed (>99.0% purity) | M2331A1 | 1 g | £1250 |
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.
- Solution-processed white OLEDs with power efficiency over 90 lm W−1 by triplet exciton management with a high triplet energy level interfacial exciplex host and a high reverse intersystem crossing rate blue TADF emitter, L. Chen et al., Mater. Horiz., 9, 1299-1308 (2022); DOI: 10.1039/D1MH02060A.