High-purity (>99.0%) and available online in sensible quantities for priority dispatch
2CzPN is a highly efficient TADF sky blue emitter with two electron-donating carbazolyl moieties attached to the electron-withdrawing dicyanobenzene ring. The carbazolyl units are noticeably distorted from the dicyanobenzene plane by steric hindrance, leading to a small ΔEST of 0.09 eV.
When compared with 4CzIPN, 2CzPN has fewer carbazolyl groups which reduces its electron-donating ability and produces a shift of the emission maximum to shorter wavelength (473 nm).
λmax 380 nm in toluene
λmax 473 nm in toluene
HOMO = 5.8 eV, LUMO = 3.0 eV; T1 = 2.5 eV
Classification / Family
Blue emitting layer materials, Blue phosphorescent host materials, TADF materials.
Highly efficient organic light-emitting diodes from delayed fluorescence, H. Uoyama et al., Nature, 492, 234-240 (2012); doi: 10.1038/nature11687.
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Exciplex Organic Light-Emitting Diodes with Nearly 20% External Quantum Efficiency: Effect of Intermolecular Steric Hindrance between the Donor and Acceptor Pair, T. Wu et al, ACS Appl. Mater. Interfaces (2019); DOI: 10.1021/acsami.9b04365.
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Bipolar host materials for high-efficiency blue phosphorescent and delayed-fluorescence OLEDs, W. Li et al., J. Mater. Chem. C, 3, 12529 (2015); DOI: 10.1039/c5tc02997j.
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