2CzPN

CAS Number 1416881-50-9

Blue Dopant Materials, Dopant Materials, High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules, TADF Materials

MSDS

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 ΔE_ST 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	λ_max 380 nm in toluene
Fluorescence	λ_max 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

2czpn — 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
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
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
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
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
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
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

Pricing

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

2CzPN MSDS sheet

Literature and Reviews

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.