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Order Code: M2123A1
MSDS sheet

General Information

CAS number 440354-93-8
Full name 9-(4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl)-9H -carbazole
Chemical formula C27H18N4
Molecular weight 474.55 g/mol
Absorption λmax 262, 356 nm in DCM
Fluorescene λmax 467 nm in DCM
HOMO/LUMO HOMO 5.9 eV, LUMO 2.98 eV [1]
Synonyms Cz-Ph-TRZ, PhCzTRZ
Classification / Family Triazine derivatives, Light-emitting diodes, Organic electronics, TADF blue emitter, PHOLEDs host materials, Sublimed materials.

Product Details

Purity Sublimed 99.81% (HPLC)
Melting point TGA: 300 °C (0.5% weight loss)
Appearance Off-white powder/crystals

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


cab-ph-trz chemical structure
Chemical structure of Cab-Ph-TRZ; CAS No. 440354-93-8.



9-(4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl)-9H -carbazole (Cab-Ph-TRZ) is ambipolar in nature, with triazine as electron-deficient and carbazole as electron-rich moieties.

Cab-Ph-TRZ is typically used as a phosphorescent host material for green and red light-emitting diodes. Compared to CBP - 4,4′-Bis(N-carbazolyl)-1,1′-biphenyl as a host material, Cab-Ph-TRZ shows higher power efficiencies with lower driving voltage, thanks to its bipolar nature.


Device structure ITO/NPB (30 nm)/TCTA (10 nm)/Cab-Ph-TRZ:Ir(ppy)2(acac)(7%; 30 nm)/TPBi (30 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour Green green
Max Current Efficiency 55.6 cd/A
Max. Power Efficiency 51.3 lm W-1
Device structure ITO/NPB (30 nm)/TCTA (10 nm)/Cab-Ph-TRZ:Ir(2-phq)(6%; 30 nm)/TPBi (30 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour Red red
Max Current Efficiency 28.72 cd/A
Max. Power Efficiency 22.85lm W-1

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


Literature and Reviews

  1. Tailoring electronic structure of organic host for high-performance phosphorescent organic light-emitting diodes, J. Xiao et al., Org. Electrons, 15, 2763–2768 (2014); DIO: 10.1016/j.orgel.2014.08.006.
  2. Operational lifetimes of organic light-emitting diodes dominated by Förster resonance energy transfer, H. Fukagawa et al., Sci. Reports, 7:1735 (2017); DOI:10.1038/s41598-017-02033-3.
  3. A New Design Strategy for Efficient Thermally Activated Delayed Fluorescence Organic Emitters: From Twisted to Planar Structures, X-K. Chen et al., Adv. Mater., 29, 1702767 (2017); DOI: 10.1002/adma.201702767.