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Product Code M2376A1-250mg
Price £300 ex. VAT

SiCzCz, phosphorescent host, hole transport and electron blocking layer

Used in conjunction with electron transport to form exciplex host for highly efficient blue phosphorescent organic light-emitting diodes

SiCzCz (CAS number 2665768-26-1) has a structure of an electron rich bicarbazole joined to a tetraphenylsilane onto one of the benzene rings. The bicarbazole donor unit introduced in SiCzCz can produce a shallower HOMO level compared to that of the mono-carbazole analog to reduce the hole injection barrier between the adjacent hole transport layer and emitting layer.

SiCzCz can normally be used as the hole transport main layer for blue OLEDs. SiCzCz has been very successful to be used with the electron transport materials, i.e. SiTrzCz2 to form an exciplex host. It is believed that the introduction of triphenyl silicon unit can stabilise the excited state and polar state of the host material by participating in the conjugated system through the hyperconjugation effect. Blue PhOLED devices based on this material exhibit LT70 = 1113h.

SiCzCz is an isomer to SimCP thus share the closest molecular structure similarity with SimCP. they both can be used as host materials.

General Information

CAS number 2665768-26-1
Chemical formula C48H34N2Si
Molecular weight 666.88 g/mol
Photoluminescence λem 385 nm (in film)
HOMO/LUMO HOMO = 5.55 eV, LUMO = 1.91 eV; ET = 2.92 eV [1]
Chemical name 9-(3-(triphenylsilyl)phenyl)-9H-3,9′-bicarbazole
Synonyms SiCzCz
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 n.a.
Appearance White powder/crystals

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

Chemical Structure

SiCzCz chemical structure,  2665768-26-1
Chemical structure of 9-(3-(triphenylsilyl)phenyl)-9H-3,9′-bicarbazole  (SimCP), CAS 2665768-26-1

Device Structure(s)

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2376A1 250 mg £300
Sublimed (>99.0% purity) M2376A1 500 mg £480
Sublimed (>99.0% purity) M2376A1 1 g £760

MSDS Documentation

SiCzCz MSDSSiCzCz MSDS sheet

Literature and Reviews

  1. 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.
  2. 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.
  3. Highly Efficient and Stable Deep-blue OLEDs Based on Narrowband Emitters Featuring Orthogonal Spiro-configured Indolo[3,2,1-de]acridine Structure, G. Meng et al., Chem. Sci., 13, 5622-5630 (2022); DOI: 10.1039/D2SC01543A.
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