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Product Code M2331A1-100mg
Price £220 ex. VAT

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

4CZFCN, 2,3,4,6-Tetra(9H-carbazol-9-yl)-5-fluorobenzonitrile, 1819362-10-1
Chemical Structure of 2,3,4,6-Tetra(9H-carbazol-9-yl)-5-fluorobenzonitrile (4CzFCN), CAS# 1819362-10-1

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 light emitting device Blue
Max. Current Efficiency 55.3 cd/A
Max. EQE 20.8%
Max. Power Efficiency 38.6 Im/W


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


Literature and Reviews

  1. 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.
  2. 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.
  3. 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.
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