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CzDBA CAS 2171334-43-1
Product Code M2417A1-100mg
Price $513 ex. VAT
$ USD

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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 2171334-43-1 sublimed material

High purity sublimed material

>99.5%

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Enhances OLED stability

Enhances OLED stability

Balanced electron and hole transport with a broad recombination zone

Excellence photoluminescence quantum yield

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
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.

Chemical Structure

czdba - 2171334-43-1 - 5,10-Bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthrene chemical structure
5,10-Bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthrene (CzDBA) chemical structure, 2171334-43-1

Product Details

Purity Sublimed* >99% (HPLC)
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.

MSDS Documentation

czdba - 2171334-43-1 - 5,10-Bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-5,10-dihydroboranthreneCzDBA MSDS Sheet

Literature and Reviews

  1. 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
  2. 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.
  3. 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.
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