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Product Code M2377A1-100mg
Price $213 ex. VAT

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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


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.

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

CAS number 2422045-58-5
Chemical formula C51H35N5Si
Molecular weight 745.94 g/mol
Photoluminescence λem 440 nm (in film)
HOMO/LUMO HOMO = 5.99 eV, LUMO = 2.75 eV; ET = 2.89 eV [1]
Chemical name 9,9′-(6-(3-(triphenylsilyl)phenyl)-1,3,5-triazine-2,4-diyl)bis(9H-carbazole) 
Synonyms mSi-2CzTrz
Classification / Family Arylsilane derivatives, Phosphorescent host materials, Hole transport layer (HTL), Electron blocking layer (EBL), Sublimed materials, Semiconducting small molecules

Product Details

Purity Sublimed* >99.0% (HPLC)
Melting point Tg =  125 °C, TGA = 487 °C (lit.)
Appearance White powder/crystals

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

Chemical Structure

SiTrzCz2 chemical structure, 2422045-58-5
Chemical structure of 9,9′-(6-(3-(triphenylsilyl)phenyl)-1,3,5-triazine-2,4-diyl)bis(9H-carbazole) (SiTrzCz2), CAS 2422045-58-5

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]
Colour blue light emitting device 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]
Colour blue light emitting device 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]
Colour blue light emitting device 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]
Colour blue light emitting device 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]
Colour blue light emitting device Blue
Max. EQE 25.4%
Max. Current Efficiency 36 cd/A
LT95 (hours) 72.9

Pricing

Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2377A1 100 mg £170
Sublimed (>99.0% purity) M2377A1 250 mg £340
Sublimed (>99.0% purity) M2377A1 500 mg £540
Sublimed (>99.0% purity) M2377A1 1 g £900

MSDS Documentation

SiTrzCz2 MSDSSiTrzCz2 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.
  4. Highly efficient and stable deep-blue organic light-emitting diode using phosphor-sensitized thermally activated delayed fluorescence, E. Kim et al., Sci Adv., 8(41), eabq1641 (2022); DOI: 10.1126/sciadv.abq1641.
  5. Control of Host-Matrix Morphology Enables Efficient Deep Blue Organic Light Emitting Devices, H. Zhao et al., Adv. Mater., 2210794 (2013); DOI: 10.1002/adma.202210794.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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