3CzBN
CAS Number 1799923-03-7
Blue Dopant Materials, Dopant Materials, High Purity Sublimed Materials, Host Materials, Materials, OLED Materials,
TADF Blue Cyanoarene-based Host Material
Donor-acceptor type TADF material for highly efficient OLEDs, available in unsublimed (≥98%) and sublimed (≥99%) grade
3CzBN is a benzonitrile derivate with three electron-doating carbazole units at meta-positions to each other. The D-A type structure is designed to maximize electronic delocalization across the molecule. 3CzBN has a ΔEST value of 0.21 eV and shows no TADF emission in toluene solution at room temperature however solvent freezing leads to the appearance of both the phosphorescence and thermally-activated emission bands. Also, because of the huge drop of ΔEST(LE) value, the energy gap between the singlet charge-transfer (1CT) and triplet locally excited (3LE) states from 0.20 eV in toluene to 0.09 eV in acetonitrile, 3CzBN becomes TADF active in acetonitrile.
Unsublimed and Sublimed
High purity ≥99%
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Switchable TADF
TADF active in CH3CN
Narrow Triplet and Singlet Energy Gap
ΔEST(LE) of 0.09 eV
Being a high-triplet-energy host with favourable carrier injection/transporting abilities, 3CZBN enables blue TADF device based on 4TCzBN dopant with a maximum external quantum efficiency of 14.8%, a maximum power efficiency of 29.5 lm W−1 and an ultra-low onset voltage of 2.8 V.
General Information
| CAS number | 1799923-03-7 |
|---|---|
| Chemical formula | C43H26N4 |
| Molecular weight | 598.69 g/mol |
| Absorption* | λmax n.a. |
| Fluorescence | λem 432 nm (Toluene) |
| HOMO/LUMO | HOMO = 5.75 eV, LUMO = 2.61 eV (ΔEST = 0.21 eV) |
| Synonyms | 2,4,6-Tri(9H-carbazol-9-yl)benzonitrile |
| Classification / Family | Cyanoarenes, Carbazole derivatives, TADF blue host. |
Product Details
| Purity | Unsublimed >98% (HNMR), Sublimed ≥99% (HPLC) |
|---|---|
| Melting point | Tg = 153 °C, Td = 401 °C |
| Appearance | Off-white powder |
Chemical Structure
MSDS Documentation
3CzBN MSDS SheetLiterature and Reviews
- T. HosoKai et al. (2019); TADF activation by solvent freezing: The role of nonradiative triplet decay and spin-orbit coupling in carbazole benzonitrile derivatives, Synth. Met., 152, 62-68; DOI: 10.1016/j.synthmet.2019.04.005.
- D. Zhang et al. (2016); Highly efficient blue thermally activated delayed fluorescent OLEDs with record-low driving voltages utilizing high triplet energy hosts with small singlet–triplet splittings, Chem. Sci., 7, 3355; DOI: 10.1039/c5sc04755b.
- T. Hosokai et al. (2018); Solvent-dependent investigation of carbazole benzonitrile derivatives: does the 3LE − 1CT energy gap facilitate thermally activated delayed fluorescence?, J. Photon. Energy, 8(3), 032102; DOI: 10.1117/1.JPE.8.032102.