FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU office.

It looks like you are using an unsupported browser. You can still place orders by emailing us on info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


Product Code M2104A1-100mg
Price $338 ex. VAT

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 λmax 275 nm in CH2Cl2
Fluorescence λem 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


Chemical structure of CzSi
Chemical Structure of 9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole (CzSi).

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 blue light emitting device
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 blue light emitting device
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 blue light emitting device
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 white light emitting device
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 MSDSCzSi MSDS sheet

Literature and Reviews


  1. FIrpic: archetypal blue phosphorescent emitter for electroluminescence, E. Baranof et al., Dalton Trans., 44, 8318 (2015); DOI: 10.1039/c4dt02991g.
  2. 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.
  3. 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 .
Return to the top