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Product Code M2218A1-250mg
Price $525 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 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.

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 £420
Sublimed (>99.0% purity) M2218A1 500 mg £700
Sublimed (>99.0% purity) M2218A1 1 g £1150

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.
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