4TCzBN
CAS Number 2055722-93-3
Blue Dopant Materials, Dopant Materials, High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules,
4TCzBN, used in white and blue highly efficient TADF-OLED devices
High-purity (>99.0%) and available online for priority dispatch, CAS No. 2055722-93-3, 2,3,5,6-Tetrakis(3,6-di-tert-butyl-9H-carbazol-9-yl)benzonitrile, Sublimed ≥99.0%
4TCzBN is another family member 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 withdrawing 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, Benzonitrile, 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
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] |
|---|---|
| Color | Sky-blue 
|
| 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] |
|---|---|
| Color | Sky-blue
|
| Max. EQE | 20.1% |
| Max. Power Efficiency | 34.5 Im/W |
*For chemical structure information, please refer to the cited references.
MSDS Documentation
4TCzBN MSDS sheetLiterature 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.