SiCzCz

CAS Number 2665768-26-1

MSDS

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	λ_em 385 nm (in film)
HOMO/LUMO	HOMO = 5.55 eV, LUMO = 1.91 eV; E_T = 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

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
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
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
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
Max. EQE	25.4%
Max. Current Efficiency	36 cd/A
LT95 (hours)	72.9

Pricing

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 MSDS sheet

Literature and Reviews

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.
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.
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.

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.