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All Semiconducting Molecules, OLED Dopant Materials, Sublimed Materials, TADF Materials

Product Code M2181A1-100mg
Price $350 ex. VAT

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2CzPN, highly efficient TADF sky blue emitter

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).

General Information

CAS number 1416881-50-9
Full name 4,5-Bis(carbazol-9-yl)-1,2-dicyanobenzene
Chemical formula C32H18N4
Molecular weight 458.51 g/mol
Absorption λmax 380 nm in toluene
Fluorescence λmax 473 nm in toluene
HOMO/LUMO HOMO = 5.8 eV, LUMO = 3.0 eV; T1 = 2.5 eV
Synonyms 1,2-Bis(carbazol-9-yl)-4,5-dicyanobenzene
Classification / Family Blue emitting layer materials, Blue phosphorescent host materials, TADF materials.

Product Details

Purity Sublimed > 99% (HPLC)
Melting point Not available
Appearance Pale yellow crystals/powder

Chemical Structure

Chemical structure of 2CzPN; CAS No. 1416881-50-9

Device Structure(s)

Device structure ITO/MoO3 (5 nm)/NPB (40 nm)/mCP (10 nm)/2CzPN: (tbt)2Ir(acac) (15 nm, 1.0 wt%)/Bphen (40 nm)/Mg: Ag (100 nm) [2]
Colour Orange orange light emitting device
Max. Power Efficiency 42.1 lm W−1
Max. Current Efficiency 77.9 cd/A
Max. EQE 26.8%
Max. Luminance Efficiency 119,900 cd/m2
Device structure ITO/PEDOT:PSS/PVK:2CzPN (20 wt%, 20 nm)/QDs/ZnO (40 nm)/Al [3]
Colour Red red light emitting device
Max. Power Efficiency 13.77 lm W−1
Max. Current Efficiency 17.33 cd/A
Max. EQE  12.37%
Device structure ITO/TAPC (40 nm)/TCTA (20 nm)/DPSTPA* (75%):2CzPN (25%) (30 nm)/3TPYMB (80 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour Green green light emitting device
Max. Power Efficiency 62.7 ± 2.2 lm W−1
Max. Current Efficiency 59.9 ± 2.2 cd/A
Max. EQE  19.0 ± 0.6%
Device structure ITO/HATCN (5 nm)/NPB (40 nm)/TCTA (10 nm)/mCP:6 wt% 2CzPN (11 nm)/TAZ:4 wt% PO-01 (4 nm)/TAZ (40 nm)/LiF (0.5 nm)/Al (150 nm) [5]
Colour White white light emitting device
Max. Power Efficiency 80.1 lm W−1
Max. Current Efficiency 47.1 cd/A
Max. EQE  38.4%
Device structure ITO/PEDOT:PSS (40 nm)/TAPC (20 nm)/TCTA (5 nm)/o-CzCN:2CzPN (4 wt%, 20 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (200 nm)  [6]
Colour Blue blue light emitting device
Max. Power Efficiency 18.36 lm W−1
Max. Current Efficiency 29.23 cd/A
Max. EQE  14.52%
Device structure ITO/PEDOT:PSS (40 nm)/TAPC (20 nm)/TCTA (5 nm)/o-CzCN:2CzPN (4 wt%, 20 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (200 nm)  [7]
Colour Blue blue light emitting device
Max. Luminance Efficiency 6,366 cd/m2
Max. Current Efficiency 53.05 cd/A
Max. EQE  25.7%

*For chemical structure information, please refer to the cited references


Grade Order Code Quantity Price
Sublimed (>99% purity) M2181A1 100 mg £280
Sublimed (>99% purity) M2181A1 250 mg £560
Sublimed (>99% purity) M2181A1 500 mg £950
Sublimed (>99% purity) M2181A1 1 g £1550

MSDS Documentation


Literature and Reviews

  1. Highly efficient organic light-emitting diodes from delayed fluorescence, H. Uoyama et al., Nature, 492, 234-240 (2012); doi: 10.1038/nature11687.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.

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