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Product Code M2218A1
Price $418.00 ex. VAT

4TCzBN, used in white and blue highly efficient TADF-OLED devices

High-purity (>99.0%) and available online for priority dispatch

4TCzBN is yet another family members of carbazolyl benzonitrile derivatives which are widely used in either white or blue highly efficient TADF-OLED devices.

The carbazolyl groups are electron donating and nitrile group is electron with-drawing while the extended tert-butyl units can serve as an encapsulation shell to the luminophore in 4TCzBN. It is believed that the introduction of the tert-butyl units we can effectively separate molecules thus reduce the chance of triplet-polaron annihilation (TPA) to greatly improve the device efficiency and stability.

General Information

CAS number 2055722-93-3
Full name 2,3,5,6-Tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)benzonitrile
Synonyms 2,3,5,6-Tetrakis[3,6-bis(1,1-dimethylethyl)-9H-carbazol-9-yl]benzonitrile
Chemical formula C87H97N5
Molecular weight 1212.73 g/mol
Absorption λmax 295 nm, 345 nm and 417 nm in toluene
Fluorescence λem 483 nm in toluene
HOMO/LUMO HOMO = 5.48 eV, LUMO = 2.73 eV, T1 = 2.60 eV [1]
Classification / Family Carbazole, Phthalonitrile, TADF materials, Blu dopant materials, Sublimed materials

Product Details

Purity Sublimed >99.0% (1H NMR)
Melting point Tg =  322 °C (lit.)
Appearance Yellow powder/crystals

*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.

Chemical Structure

4tczbn chemical structure
Chemical Structure of 2,3,5,6-Tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)benzonitrile (4TCzBN).

Device Structure(s)

Device structure ITO/HATCN (5 nm)/NPB (30 nm)/TCTA (10 nm)/mCP (10 nm)/4TCzBN:2,4-2CzBN* (30 nm)/DPEPO (10 nm)/Bphen (30 nm)/LiF (0.5 nm)/Al (150 nm) [1]
Colour Sky-blue blue light emitting device
Max. EQE 21.5%
Max. Power Efficiency 42.0 Im/W
Device structure ITO/HATCN (5 nm)/NPB (30 nm)/TCTA (10 nm)/mCP (10 nm)/4TCzBN:3,5-2CzBN* (30 nm)/DPEPO (10 nm)/Bphen (30 nm)/LiF (0.5 nm)/Al (150 nm) [1]
Colour Sky-blue blue light emitting device
Max. EQE 20.1%
Max. Power Efficiency 34.5 Im/W

*For chemical structure information, please refer to the cited references.

MSDS Documentation



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Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2218A1 250 mg £380
Sublimed (>99.0% purity) M2218A1 500 mg £640
Sublimed (>99.0% purity) M2218A1 1 g £1050

Literature and Reviews

  1. Highly efficient blue thermally activated delayed fluorescent OLEDs with record-low driving voltages utilizing high triplet energy hosts with small singlet–triplet splittings, D. Zhang et al., Chem. Sci., 7, 3355 (2016); DOI: 10.1039/c5sc04755b.
  2. Modulation of Förster and Dexter Interactions in Single-Emissive-Layer All-Fluorescent WOLEDs for Improved Efficiency and Extended Lifetime, P. Wei et al., Adv. Funct. Mater., 2019; DOI: 10.1002/adfm.201907083.
  3. Highly efficient and stable blue thermally activated delayed fluorescence emitters, D. Zhang et al., SPIE (2016); DIO: 10.1117/2.1201611.006797.

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.

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