SiTrzCz2

SiTrzCz2, electron transport and exciplex host

Used in conjunction with hole transport to form exciplex host for highly efficient blue phosphorescent organic light-emitting diodes, 9,9′-(6-(3-(triphenylsilyl)phenyl)-1,3,5-triazine-2,4-diyl)bis(9H-carbazole), CAS No. 2422045-58-5, Sublimed ≥99.0%

SiTrzCz2, 9,9′-(6-(3-(triphenylsilyl)phenyl)-1,3,5-triazine-2,4-diyl)bis(9H-carbazole), has a molecular structure of two electron rich carbzolyl and one tetraphenylsilane units that are bridged by a electron deficient 1,3,5-trazine. SiTrzCz2 is electron deficient so it is normally used as electron transport layer, or as a blue bipolar phosphorescent host, or as one of the electron accepting components in a binary exciplex host.

SiTrzCz2 from Ossila was used in the high-impact paper (IF 38.5), Pure-blue single-layer organic light-emitting diodes based on trap-free hyperfluorescence, O. Sachnik et al., Nat. Mater., 24, 1742–1748 (2025); DOI: 10.1038/s41563-025-02294-8.

Exciplex host SiCzCz:SiTrZCz2 has a triplet energy level that is lower than those of single host materials but still high enough to allow the exciplex to be used as a co-host in blue phosphorescent organic light-emitting diodes (PhOLEDs). Also device using mCBP:SiTrZCz2 (mSi-2CzTrz) as exciplex host demonstrated an external quantum efficiency of 22.8% and a operational lifetime with up to 80% of the initial luminance of over 2000 h at 100 cd m⁻² in blue PhOLEDs [1].

General Information

Product Details

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

Chemical Structure

Device Structure(s)

Device structure	ITO (50 nm)/BCFN:HATCN (40 nm, 30 wt%)/BCFN (10 nm)/mCBP (10 nm)/ mCBP:mSi-2CzTrz:CNImIr (30 nm, 42.5:42.5:15 wt%)/DBFTrz (5 nm)/ZADN (20 nm)/LiF (1.5 nm)/Al (200 nm) [1]
Color	Blue
Max. EQE	15.4%
Max. Power Efficiency	19.5 Im/W
Max. Current Efficiency	32.4 cd/A

Device structure	ITO/HAT-CN (10 nm)/BCFN (60 nm)/SiCzCz (5 nm)/SiCzCz:SiTrzCz2:BD-01 (35 nm, 0.60:0.27:0.13 w/w/w)/mSiTrz (5 nm)/mSiTrz:Liq (31 nm, 5:5)/LiF (1.5 nm)/Al (80 nm) [2]
Color	Blue
Max. EQE	17.6%
Max. Power Efficiency	40.7 Im/W
Max. Current Efficiency	36.3 cd/A

Device structure	ITO/HAT-CN (10 nm)/BCFN (60 nm)/SiCzCz (5 nm)/SiCzCz:SiTrzCz2:BD-02 (35 nm, 0.60:0.27:0.13 w/w/w)/mSiTrz (5 nm)/mSiTrz:Liq (31 nm, 5:5)/LiF (1.5 nm)/Al (80 nm) [2]
Color	Blue
Max. EQE	25.4%
Max. Power Efficiency	35.7 Im/W
Max. Current Efficiency	31.8 cd/A

Device structure	ITO/HAT-CN (10 nm)/BCFN (60 nm)/SiCzCz (5 nm)/SiCzCz:SiTrzCz2:PtON-TBBI:t-DABNA (EML 30 nm)/2SiTrzPh (5 nm)/2SiTrzPh:Liq (5:5, 31 nm)/LiF (1.5 nm)/Al (80 nm)[3]
Color	Blue
Max. EQE	23.7%
Max. Current Efficiency	26.2 cd/A
LT95 (hours)	19.8

Device structure	ITO/HAT-CN (10 nm)/BCFN (60 nm)/SiCzCz (5 nm)/SiCzCz:SiTrzCz2:PtON-TBBI:TBE02 (EML 30 nm)/2SiTrzPh (5 nm)/2SiTrzPh:Liq (5:5, 31 nm)/LiF (1.5 nm)/Al (80 nm)[3]
Color	Blue
Max. EQE	25.4%
Max. Current Efficiency	36 cd/A
LT95 (hours)	72.9

Pricing

MSDS Documentation

SiTrzCz2 MSDS sheet

Literature and Reviews

1. Rational design of blocking groups for high triplet energy n-type host materials, J. Ha et al., J. Mater. Chem. C, 10, 5962-5969 (2022); DOI: 10.1039/D1TC06083J.
   
2. Superbly long lifetime over 13,000 h for multiple energy transfer channels in deep blue phosphorescence organic light-emitting diodes with Ir complex under CIEy of 0.17, K. Kim et al., Chem. Eng. J. 448, 137671 (2022); DOI: 10.1016/j.cej.2022.137671.
   
3. Exceptionally stable blue phosphorescent organic light-emitting diodes, J. Sun et al., Nat. Photon. 16, 212–218 (2022); DOI: 10.1038/s41566-022-00958-4.
   

View Literature and Reviews

Technical Support

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