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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.
High-efficiency phosphorescent organic light-emitting devices with low efficiency roll-off using a thermally activated delayed fluorescence material as host, Y. Qi et al., Org. Electron., 36, 185-191 (2016); DIO: 10.1016/j.orgel.2016.05.043.
Efficient Quantum-Dot Light-Emitting Diodes Employing Thermally Activated Delayed Fluorescence Emitters as Exciton Harvesters, Y. Zhang et al., ACS Appl. Mater. Interfaces, 10, 7435−7441 (2018); DOI: 10.1021/acsami.7b16579.
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.
Highly efficient and color-stable hybrid warm white organic light-emitting diodes using a blue material with thermally activated delayed fluorescence, D. Zhang et al, J. Mater. Chem. C, 2, 8191 (2014); DOI: 10.1039/c4tc01289e.
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.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.