|Full name||9-(4-(4,6-Diphenyl-1,3,5-triazin-2-yl)phenyl)-9H -carbazole|
|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 |
|Classification / Family||Triazine derivatives, Light-emitting diodes, Organic electronics, TADF blue emitter, PHOLEDs host materials, Sublimed materials.|
|Purity||Sublimed 99.81% (HPLC)|
|Melting point||TGA: 300 °C (0.5% weight loss)|
*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.
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) |
|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)3 (6%; 30 nm)/TPBi (30 nm)/LiF (1 nm)/Al (100 nm) |
|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
- 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.
- 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.
- 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.