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Product Code M2120A1-250mg
Price £320 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 mCPmCPSOB 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 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.


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


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.
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