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Product Code M2267A1
Price $225.00 ex. VAT

DCzDBT, for blue TADF devices achieving excellent EQE

HBL material to significantly improve device operational lifetimes

DCzDBT, also referred to as mCBT, is a carbazole-based bipolar host material containing two carbazole and one dibenzothiophene units for blue thermally activated delayed fluorescent (TADF) devices achieving excellent external quantum efficiencies (EQE).

With a wide bandgap, DCzDBT has also been used as hole blocking layer (HBL) material to replace BAlq to significantly improve device operational lifetimes.

General Information

CAS number 913738-04-2
Chemical formula C36H22N2S
Molecular weight 514.64 g/mol
Absorption λmax 293 nm (in DCM)
Fluorescence λem 385 nm (in DCM)
HOMO/LUMO HOMO = 5.71 eV, LUMO = 2.19 eV [1]
Full chemical name 2,8-Di(9H-carbazol-9-yl)dibenzo[b,d]thiophene
Synonyms mCBT, ZDZ, 2,8-Bis(9H-carbazol-9-yl)dibenzothiophene, 9,9'-(2,8-Dibenzothiophenediyl)bis-9H-carbazole
Classification / Family Carbazole derivatives, TADF host materials, Sublimed materials

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point TGA >350 °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 for OLED devices page.

Chemical Structure

DCzDBT, CAS# 913738-04-2, mCBT
Chemical structure of 2,8-Di(9H-carbazol-9-yl)dibenzo[b,d]thiophene (DCzDBT), CAS# 913738-04-2.

Device Structure(s)

Device structure ITO/HATCN (10 nm)/NPD (40 nm)/TrisPCz/10% PtN'1N-tBu:mCBP (25nm)/DCzDBT (8 nm)/BPyTP (40 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour Sky-blue blue light emitting device
Max. EQE 17.8%
Device structure ITO (40 nm)/HATCN (10 nm)/NPD (40 nm)/Tris-PCz (10 nm)/20% PtNON:mCBP (10 nm)/10% PtNON:mCBP (4 nm)/2% TBPe:mCBP (2 nm)/10% PtNON:mCBP (4 nm)/6% PtNON:mCBP (10 nm)/DCzDBT (8 nm)/ BPyTP (40 nm)/LiF (1 nm)/AL (100 nm) [3]
Colour Sky-blue blue light emitting device
Max. EQE 18%
Device structure ITO (50 nm)/HATCN (7 nm)/TAPC (75 nm)/2CzPN 6 wt% DCzDBT (20 nm)/TmPyPB (50 nm)/LiF (1.5 nm)/Al (100 nm)
Colour Sky-blue blue light emitting device
Max. Current Efficiency 10.72 cd/A
Max. EQE 18.5 %


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2267A1 100 mg £180
Sublimed (>99.0% purity) M2267A1 250 mg £360
Sublimed (>99.0% purity) M2267A1 500 mg £600
Sublimed (>99.0% purity) M2267A1 1 g £1000

MSDS Documentation


Literature and Reviews

  1. High-performing Bipolar Host Materials for Blue Thermally Activated Delayed Fluorescent Devices with Excellent External Quantum Efficiencies, J. Kang et al., J. Mater. Chem. C,4, 4512-4520 (2016); DOI: 10.1039/C6TC00385K.
  2. Stable and Efficient Sky-blue Organic Light Emitting Diodes Employing a Tetradentate Platinum Complex, G. Li et al., Appl. Phys. Lett. 110, 113301 (2017); DOI: 10.1063/1.4978674.
  3. Efficient Blue Phosphorescent OLEDs with Improved Stability and Color Purity through Judicious Triplet Exciton Management, K. Klimes et al., Adv. Funct. Mater., 29 (31); 1903068 (2019); DOI: 10.1002/adfm.201903068.
  4. Highly Efficient and Stable Narrow-Band Phosphorescent Emitters for OLED Applications, G. Li et al., Adv. Optical Mater., 3 (3), 1400341 (2014); DOI: 10.1002/adom.201400341.

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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