4CzIPN

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Out of its three isomers, 4CzIPN has the highest photo-luminescence quantum efficiency (PLQY) of above 90%. This is due to the wide dispersion the highest-occupied molecular orbital (HOMO) over the donor moieties. Relatively short excited-state lifetime of delayed emission was reported. Additionally, higher external quantum efficiency (EQE) was observed by using 4CzIPN as an emitter in TADF-OLED devices.

Despite its low solubility in most of the aromatic solvents, 4CzIPN is also solution-processable in solvents such as dichloromethane or chloroform. This is due to the structure distortion of the carbazole units caused by steric hindrance.

General Information

CAS number	1416881-52-1
Chemical formula	C₅₆H₃₂N₆
Molecular weight	788.89 g/mol
Absorption*	λ_max 365 nm in acetonitrile
Fluorescene	λ_em 551 nm in acetonitrile
HOMO/LUMO	HOMO = 5.8 eV, LUMO = 3.4 eV [1]
Synonyms	2,4,5,6-Tetra(9H-carbazol-9-yl)isophthalonitrile
Classification / Family	Carbazole, TADF green emitter materials, Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials

* Measurable with an Optical Spectrometer, see our spectrometer application notes.

Product Details

Purity	Sublimed >99.0% (HPLC)
Melting point	TGA: >300 °C (0.5% weight loss)
Appearance	Orange-yellow powder/crystals

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.

Chemical Structure

Device Structure(s)

Device structure	ITO (70 nm)/(4 wt% ReO 3 ):mCP (50 nm)/mCP (15 nm)/mCP:B3PyMPM:(5 wt% 4CzIPN) (30 nm)/B3PYMPM (20 nm)/(4 wt% Rb₂CO₃):B3PYMPM (35 nm)/Al (100 nm) [3]
Colour	Green
Max. Current Efficiency	94.5 cd/A
Max. EQE	29.6%
Max. Power Efficiency	88.6 Im/W

Device structure	ITO (50 nm)/PEDOT:PSS (60 nm)/poly(9-vinylcarbazole) (15 nm)/SiCz:4CzIPN (30 nm)/TSPO1 (35 nm)/LiF (1 nm)/Al (200 nm) [4]
Colour	Green
Max. EQE	26%
Max. Power Efficiency	63.4 Im/W

Device structure	ITO(130 nm)/TAPC (35 nm)/CBP (5 nm)/5 wt% 4CzIPN doped CBP (5 nm)/B4PyPPM (65 nm)/LiF (0.8 nm)/Al (100 nm) [5]
Colour	Green
Max. Current Efficiency	83.2 cd/A
Max. EQE	25.7%
Max. Power Efficiency	106.9 Im/W

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.0% purity)	M2100A1	250 mg	£239.00
Sublimed (>99.0% purity)	M2100A1	500 mg	£416.00
Sublimed (>99.0% purity)	M2100A1	1 g	£716.00

MSDS Documentation

4CzIPN MSDS sheet

Literature and Reviews

Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence, H. Nakanotani et al., Sci Rep., 3: 2127 (2013); doi: 10.1038/srep02127.
Solvent Effect on Thermally Activated Delayed Fluorescence by 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene, R. Ishimatsu et al., J. Phys. Chem. A, 117, 5607−5612 (2013); DOI: 10.1021/jp404120s.
A Fluorescent Organic Light-Emitting Diode with 30% External Quantum Efficiency, J-W. Sun et al., Adv. Mater., 26, 5684–5688 (2014); DOI: 10.1002/adma.201401407.
High Efficiency in a Solution-Processed Thermally Activated Delayed-Fluorescence Device Using a Delayed-Fluorescence Emitting Material with Improved Solubility, Y-J. Cho et al., Adv. Mater., 26, 6642–6646 (2014); DOI: 10.1002/adma.201402188.
High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Efﬁ ciency of over 100 lmW⁻¹, Y. Seino et al; Adv. Mater., 28, 2638–2643 (2016); DOI: 10.1002/adma.201503782.

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.