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Product Code M2267A1-100mg
Price £200 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.

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 £200
Sublimed (>99.0% purity) M2267A1 250 mg £400
Sublimed (>99.0% purity) M2267A1 500 mg £660
Sublimed (>99.0% purity) M2267A1 1 g £1100

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.
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