CzSi

CAS Number 898546-82-2

MSDS

CzSi, TADF host material for blue electrophosphorescence

Exhibits enhanced morphological and superior electrochemical stability

CzSi is known for its high triplet energy, wide band-gap, and high glass-transition temperature (Tg >131 °C). It is one of the most widely-used TADF host materials for blue electrophosphorescence.

It possesses bulky, sterically-hindered triphenylsilyl substitutions on electrochemically-active C3 and C6 positions of carbazole. With a nearly-perfect 90° dihedral angle between its carbazole and tert-butylphenyl groups, CzSi exhibits enhanced morphological and superior electrochemical stability.

General Information

CAS number	898546-82-2
Full name	9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole
Chemical formula	C₅₈H₄₉NSi₂
Molecular weight	816.19 g/mol
Absorption	λ_max 275 nm in CH₂Cl₂
Fluorescence	λ_em 354 nm in CH₂Cl₂
HOMO/LUMO	HOMO = 6.0 eV, LUMO = 2.5 eV; T₁=3.02 eV [1]
Classification / Family	Carbazole, TADF blue emitter host materials, Hole-transport layer materials, Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials

Product Details

Purity	Sublimed >99.0% (HPLC)
Melting point	TGA: >320 °C (0.5% weight loss)
Appearance	Off-white powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Chemical Structure

Device Structure(s)

Device structure	ITO/PEDOT:PSS (30 nm)/DPAS (17.5 nm)/TCTA (2.5 nm)/CzSi doped with 8 wt% FIrpic (25 nm)/TAZ (50 nm)/LiF (0.5 nm)/Al (150 nm) [2]
Colour	Blue
Max. Current Efficiency	30.6 cd/A
Max. EQE	15.7%
Max. Power Efficiency	26.7 Im/W

Device structure	ITO/TAPC (30 nm)/TCTA (10 nm)/CzSi (3 nm)/CzSi doped with 4 wt% of 2c* (25 nm)/UGH2 doped with 4 wt% of 2c*(3 nm)/UGH2 (2 nm)/TmPyPB (50 nm)/LiF (0.8 nm)/Al (150 nm) [3]
Colour	Blue
Max. Current Efficiency	22.3 cd/A
Max. EQE	11%
Max. Power Efficiency	16.7 Im/W

Device structure	(ITO)/a-NPD (30 nm)/TCTA (20 nm)/CzSi (3 nm)/CzSi doped with 6 wt% 2* (35 nm)/UGH2 doped with 6* wt%Ir(fppz)₂(dfbdp) (3 nm)/UGH2 (2 nm)/BCP (50 nm)/Cs₂CO₃(2 nm)/Ag (150 nm) [4]
Colour	Blue
Max. Current Efficiency	11.4 cd/A
Max. EQE	11.9%
Max. Power Efficiency	7.9 Im/W

Device structure	ITO/NPB (30 nm)/TCTA (20 nm)/FIrpic:CzSi (7%, 20 nm)/(DMBA)₂Ir(acac):CBP (5%, 200 nm)/TAZ (50 nm)/ LiF (1 nm)/Al (100 nm) [5]
Colour	White
Max. Current Efficiency	25.6 cd/A
Max. EQE	12.7%
Max. Power Efficiency	20.2 Im/W

*For chemical structure information, please refer to the cited references.

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.0% purity)	M2104A1	100 mg	£250
Sublimed (>99.0% purity)	M2104A1	250 mg	£500
Sublimed (>99.0% purity)	M2104A1	500 mg	£850
Sublimed (>99.0% purity)	M2104A1	1 g	£1300

MSDS Documentation

CzSi MSDS sheet

Literature and Reviews

FIrpic: archetypal blue phosphorescent emitter for electroluminescence, E. Baranof et al., Dalton Trans., 44, 8318 (2015); DOI: 10.1039/c4dt02991g.
Highly Efficient Organic Blue Electrophosphorescent Devices Based on 3,6-Bis(triphenylsilyl)carbazole as the Host Material, M-H. Tsai et al., Adv. Mater., 18, 1216–1220 (2006); DOI: 10.1002/adma.200502283.
Iridium(III) Complexes of a Dicyclometalated Phosphite Tripod Ligand: Strategy to Achieve Blue Phosphorescence Without Fluorine Substituents and Fabrication of OLEDs, C-H. Lin et al., Angew. Chem., 123, 3240 –3244 (2011); DOI: 10.1002/ange.201005624 .

En Route to High External Quantum Efficiency (~12%), Organic True-Blue-Light-Emitting Diodes Employing Novel Design of Iridium (III) Phosphors, Y-C. Chiu et al., Adv. Mater., 21, 2221–2225 (2009); DOI: 10.1002/adma.200802546.
Highly efficient white organic light-emitting diodes based on broad excimer emission of iridium complex, G. Zhang et al., Org. Electronics 11, 1165–1171 (2010); doi:10.1016/j.orgel.2010.04.016.