FREE shipping on qualifying orders when you spend or more. All prices ex. VAT. Enjoy hassle-free delivery, fulfilled by our EU subsidiary. Backed by our 50 State Delivery Guarantee. Regional distributors also available. Sorry, we are unable to accept orders from or ship to .

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 M2120A1-250mg
Price $416 ex. VAT

mCPSOB, ambipolar host TADF material

Ideal host material for blue/deep blue dopants


9-(3-(9H-Carbazol-9-yl)-5-(phenylsulfonyl)phenyl)-9H-carbazole (mCPSOB) is an ambipolar host thermally activated delayed fluorescence (TADF) material containing two electron-donating carbazole groups and one electron-accepting diphenylsulfonyl group.

mCPSOB has a high energy level of the triplet state (3.02 eV), which suppresses triplet exciton quenching and results in higher external quantum efficiency (EQE). Higher triplet energy level also makes it ideal as a host material for blue/deep blue dopants.

Compared to mCP, mCPSOB has a higher glass transition temperature (Tg = 140 °C). In return, this can prevent mCPSOB from crystallising during operation and reduces the possibility of phase separation - thus significantly improving device thermal and morphological stability.

General Information


CAS number 1374770-41-8
Full name 9-(3-(9H-Carbazol-9-yl)-5-(phenylsulfonyl)phenyl)-9H-carbazole
Chemical formula C36H24N2O2S
Molecular weight 548.65 g/mol
HOMO/LUMO

HOMO 5.8 eV, LUMO 2.5 eV;

ES = 2.93 eV, ET = 3.02 eV [1]

Synonyms 3,5-Di(carbazol-9-yl)-1-phenylsulfonylbenzene
Classification / Family Carbazole derivatives, Light-emitting diodes, Organic electronics, TADF blue/green host materials, Ambipolar materials, Sublimed materials.

Product Details


Purity Sublimed >99.0% (HPLC)
Melting point

TGA > 200 °C (0.5% weight loss)

Tg = 140 °C

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


CPSOB chemical structure
Chemical structure of mCPSOB

Device Structure(s)


Device structure ITO/MoO3 (15 nm)/Poly-TriCZ (50 nm)/mCPSOB:4CzIPN (25 nm)/TPBi (60 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour Green green light emitting device
Current Efficiency@10 cd/m2 80.6 cd/A
EQE@10 cd/m2 26.5%
Power Efficiency@10 cd/m2 79 lm W-1

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

Pricing


Grade Order Code Quantity Price
Sublimed (>99%) M2120A1 250 mg £320
Sublimed (>99%) M2120A1 500 mg £520
Sublimed (>99%) M2120A1 1 g £900

MSDS Documentation


mCPSOB MSDSmCPSOB MSDS sheet

Literature and Reviews


  1. Highly efficient Organic Light-Emitting Diodes from thermally activated delayed fluorescence using a sulfone–carbazole host material, M. Gaj et al., Org. Electronics, 16, 109–112 (2015); DIO: 10.1016/j.orgel.2014.10.049.
  2. Perspective on carbazole-based organic compounds as emitters and hosts in TADF applications, B. Wex et al., J. Mater. Chem. C, 5, 8622 (2017); DOI: 10.1039/c7tc02156a.
  3. Purely Organic Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes, M. Wong et al., Adv. Mater., 29, 1605444 (2017); DOI: 10.1002/adma.201605444.
Return to the top