DCzDBT

CAS Number 913738-04-2

High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules, TADF Materials

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	λ_max 293 nm (in DCM)
Fluorescence	λ_em 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
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
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
Max. Current Efficiency	10.72 cd/A
Max. EQE	18.5 %

Pricing

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

DCzDBT MSDS sheet

Literature and Reviews

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.
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.
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.

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.