CzDBA
CAS Number 2171334-43-1
Dopant Materials, High Purity Sublimed Materials, Materials, Semiconducting Molecules, TADF Materials
Green Dopant Material with Boron-based Carbazoles
High purity sublimed thermally activated delayed fluorescent (TADF) emitter for highly efficient OLEDs
CzDBA (CAS number 2171334-43-1), namely 5,10-bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthrene, is a diboron compound with a D-A-D structure of two electron-donating carbazoles on both ends and an electron-accepting dihydroboranthrene in the middle, bridged by two 2,6-dimethylphenyls between the donor and acceptor units.
High purity sublimed material
>99.5%
Worldwide shipping
Quick and reliable shipping
Enhances OLED stability
Balanced electron and hole transport with a broad recombination zone
Excellence photoluminescence quantum yield
C.a. 100% and an 84% horizontal dipole ratio in the thin film
With near-trap-free and remarkably balanced bipolar electron and hole transport characteristics, CzDBA is a thermally activated delayed fluorescence (TADF) emitter, converting triplet excitons into singlet excitons via reverse intersystem crossing (RIC). This D-A-D type structure generates TADF with a photoluminescence quantum yield of ~100% and an 84% horizontal dipole ratio in the thin film. A green OLED based on CzDBA exhibits a high external quantum efficiency of 37.8 ± 0.6%, a current efficiency of 139.6 ± 2.8 cd A−1 and a power efficiency of 121.6 ± 3.1 lm W−1 with an efficiency roll-off of only 0.3% at 1,000 cd m−2. Furthermore, the balanced electron and hole transport results in a broad recombination zone, leading to greatly enhanced device stability.
General Information
CAS number | 2171334-43-1 |
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Chemical formula | C52H50B2N2 |
Molecular weight | 714.51 g/mol |
Absorption* | λmax 342 nm (in toluene) |
Fluorescence | λem 524 nm (in film) |
HOMO/LUMO | HOMO = 5.93 eV, LUMO = 3.45 eV |
Synonyms | 5,10-Bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthrene |
Classification / Family | Carbazole derivatives, Green dopant, TADF materials, Sublimed materials. |
Product Details
Purity | Sublimed* >99% (HPLC) |
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Melting point | TGA: n.a. |
Appearance | White crystals/powder |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.
Chemical Structure
Pricing
Grade | Product Code | Quantity | Price |
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Sublimed (>99.5% purity) | M2417A1 | 100 mg | £250 |
Sublimed (>99.5% purity) | M2417A1 | 250 mg | £500 |
Sublimed (>99.5% purity) | M2417A1 | 500 mg | £800 |
Sublimed (>99.5% purity) | M2417A1 | 1 g | £1150 |
MSDS Documentation
Literature and Reviews
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Diboron compound-based organic light-emitting diodes with high efficiency and reduced efficiency roll-off, T. Wu et al., Nature Photon 12, 235–240 (2018); DOI: 10.1038/s41566-018-0112-9
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Substituent engineering of the diboron molecular architecture for a nondoped and ultrathin emitting layer, T. Wu et al., Chem. Sci., 13, 12996 (2022); DOI: 10.1039/d2sc04725j.
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Molecular Origin of Balanced Bipolar Transport in Neat Layers of the Emitter CzDBA, W. Liu et al., Adv. Mater. Technol., 6 (2), 2000120 (2021); DOI: 10.1002/admt.202000120.