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.
|Molecular weight||1212.73 g/mol|
|Absorption||λmax 295 nm, 345 nm and 417 nm in toluene|
|Fluorescene||λem 483 nm in toluene|
|HOMO/LUMO||HOMO = 5.48 eV, LUMO = 2.73 eV, T1 = 2.60 eV |
|Classification / Family||Carbazole, Phthalonitrile, TADF materials, Blu dopant materials, Sublimed materials|
|Purity||Sublimed >99.0% (1H NMR)|
Tg = 322 °C (lit.)
*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.
|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) |
|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) |
|Max. Power Efficiency||34.5 Im/W|
*For chemical structure information, please refer to the cited references.
|Sublimed (>99.0% purity)||M2218A1||250 mg||£316.00|
|Sublimed (>99.0% purity)||M2218A1||500 mg||£536.00|
|Sublimed (>99.0% purity)||M2218A1||1 g||£858.00|
Literature and Reviews
- 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.
- 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.
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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