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Product Code M2331A1-100mg
Price $275 ex. VAT

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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

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 MSDS4CzFCN MSDS Sheet

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.
  4. 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.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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