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Product Code M2251B1-250mg
Price £240 ex. VAT

2,3,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,4-dicyanobenzene (4CzTPN-tBu) is the t-butylated derivative of 4CzTPN and it is sterically hindered with eight bulky tert-butyl peripheral end groups. Also due to the tert-butyl peripheral end groups, it becomes more soluble in most of the common organic solvents which makes all solution processing device possible.

4CzTPN-tBu as orange emitting layer, when blended in sky-blue delayed fluorescence molecule (4-(spiro[acridine-9,9’-fluoren]−10-yl)phenyl)(9-(3,5-di(carbazol-9-yl)phenyl)carbazol-3-yl)methanone (TCP-BP-SFAC) host, achieved record high power efficiency (PE) of 130.7 lm W-1, due to the balanced ambipolar transportation and high solid-state efficiency of TCP-BP-SFAC, and the effectively alleviated exciton quenching caused by the electron-trapping effect of 4CzTPN-tBu [1].

4CzTPN-tBu is an isomer to 4CzPN-tBu and 4CzIPN-tBu.

General Information

CAS Number 2153433-46-4
Full Name 2,3,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,4-dicyanobenzene
Synonyms 4CzTPN-Bu, 4CzTPNBu
Chemical Formula C88H96N6
Molecular Weight 1237.74 g/mol
Absorption λmax 282 nm in toluene
Fluorescene λem 565 nm in toluene
HOMO/LUMO HOMO = 5.50 eV, LUMO = 3.30 eV [1]
Classification / Family Carbazole derivatives, Terephthalonitriles, TADF materials, Orange to red dopant materials, Sublimed materials

Chemical Structure

4cztpn-tbu chemical structure, 2153433-46-4
Chemical Structure of 2,3,5,6-tetrakis(3,6-di-tert-butylcarbazol-9-yl)-1,4-dicyanobenzene (4CzTPN-tBu), CAS 2153433-46-4

Product Details

Purity Unsublimed >98.0% (1H NMR)
Melting Point N/A
Appearance Orange powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Device Structure

Device Structure ITO/HATCN (5 nm)/TAPC (50 nm)/TcTa (5 nm)/mCP (5 nm)/TCP-BP-SFAC (9 nm)/1 wt% 4CzTPNBu: TCP-BP-SFAC (5 nm)/TCP-BP-SFAC (6 nm)/PPF (5 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al [1]
Colour white light emitting device White
Max. Current Efficiency 104.2 cd/A
Max. EQE 31.1%
Max. Power Efficiency 130.7 Im/W

Device Structure ITO/MoO3/NPB/mCP/PADPO:DMAC-DPS:4CzTPN-Bu/PADPO/Bphen/LiF/Al [2]
Colour white light emitting device White
Max. Current Efficiency 63.7 cd/A
Max. EQE 20.3 %
Max. Power Efficiency 67.8 Im/W

Colour white light emitting device White
Max. Current Efficiency 53.3 cd/A
Max. EQE 23.0 %
Max. Power Efficiency 64.4 Im/W

MSDS Documentation

4CzTPN-tBu MSDS4CzTPN-tBu MSDS sheet


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2251A1 250 mg £240
Sublimed (>99.0% purity) M2251A1 500 mg £390
Sublimed (>99.0% purity) M2251A1 1 g £620

Literature and Reviews

  1. Achieving Balanced Electrical Performance of Host Material through Dual N-P=O Resonance Linkage for Efficient Electroluminescence, H. Li et al., ACS Appl. Mater. Interfaces, 14 (22), 25834–25841 (2022); DOI: 10.1021/acsami.2c02745.
  2. Achieving High Electroluminescence Efficiency and High Color Rendering Index for All‐Fluorescent White OLEDs Based on an Out‐of‐Phase Sensitizing System, H. Liu et al., Adv. Funct. Mater., 31, 2103273 (2021); DOI: 10.1002/adfm.202103273.
  3. Symmetrical spirobi[xanthene] based locally asymmetrical phosphine oxide host for low-voltage-driven highly efficient white thermally activated delayed fluorescence diodes, R. Du et al., Chem. Eng. J., 392, 124870 (2020); DOI: 10.1016/j.cej.2020.124870.
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