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Product Code M2430A1-LT-500mg
Price $663 ex. VAT

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Blue Dopant Material with Boron-based Triarylamines

High purity sublimed narrowband multi-resonance TADF emitter for highly efficient OLEDs


CzBN, also known as Indolo[3,2,1-de]indolo[3',2',1':8,1][1,4]benzazaborino[2,3,4-kl]phenazaborine, is closely related to DABNA-1 in structure. The only difference being is that the two phenylamines on each side of the DABNA-1 structure are joined to form two side carbazolyl substructures. As a result, CzBN is conjugated with a triphenyl boron core and it is believed that the formed carbazolyl groups extend the p-conjugation and increase the intramolecular charge transfer localization area for a greater multiresonance effect.

CzBN can also be considered as a derivate of 1,3-bis(N-carbazolyl)benzene (mCP), one of the most widely used host materials in OLED devices.

DABNA-1 and CzBN chemical structures
DABNA-1 and CzBN chemical structures

Due to the conjugation, CzBN is relatively red shifted in absorption and emission when compared to DABNA-1. CzBN has an absorption band at around 470 nm and narrow emission band at 479 nm with FWHM of 30 nm in dilute dichloromethane solution and PLQYs of 87%.

A solution processed sky-blue multiresonance TADF OLED device, based on 5 wt.% CzBN in a CzAcSF host, exhibited a maximum current efficiency of 24.3 cd/A, a power efficiency of 15.9 lm/W, and an external quantum efficiency of 14.7%. This is a device efficiency improvement when compared to the vacuum-deposited OLEDs based on DABNA-1.

General Information

CAS Number 2170487-27-9
Chemical formula C30H17BN2
Molecular weight 416.28 g/mol
Absorption* λmax 470 nm (in DCM)
Fluorescence λem 479 nm (in DCM)
HOMO/LUMO HOMO = 5.62 eV, LUMO = 2.91 eV (ΔEST = 0.12 eV)
Synonyms Indolo[3,2,1-de]indolo[3',2',1':8,1][1,4]benzazaborino[2,3,4-kl]phenazaborine
Classification or Family Triarylamine derivatives, Tryphenylboron, Blue dopant, Multiresonance thermally activated delayed fluorescent (MR-TADF), Sublimed materials.

Product Details

Purity Sublimed* >99% (HPLC)
Melting point -
Appearance Yellow powder/crystals

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.

Chemical Structure

CzBN - 2170487-27-9 - Indolo[3,2,1-de]indolo[3',2',1':8,1][1,4]benzazaborino[2,3,4-kl]phenazaborine chemical structure
Indolo[3,2,1-de]indolo[3',2',1':8,1][1,4]benzazaborino[2,3,4-kl]phenazaborine (CzBN) chemical structure, 2170487-27-9

Device Structure(s)

Device structure ITO/PEDOT:PSS (40 nm)/CzAcSF:5 wt.% CzBN (50 nm)/DPEPO (10 nm)/TmPyPB (35 nm)/Liq (1 nm)/Al [1]
Colour blue light emitting device Sky-blue emission at 482 nm with an FWHM of 36 nm
Max Current Efficiency 24.3 cd/A
Max Power Efficiency 15.9 lm/W
Max EQE 14.7%

 

Device structure ITO/HAT-CN (10 nm)/Tris-PCz (30 nm)/mCBP (5 nm)/mCBP:20 wt% TPh2Cz2DPhCzBN*:0.5 wt% CzBN (30 nm)/SF3-TRZ (10 nm)/SF3-TRZ:30 wt% Liq (20 nm)/Liq (2 nm)/Al (100 nm) [2]
Colour blue light emitting device Sky-blue emission (0.135, 0.312) at 480 nm with an FWHM of 34 nm
Max. Luminescence 49,933 cd/m2
Max Current Efficiency 38.3 cd/A
Max Power Efficiency 40.1 lm/W
Max EQE 20.6%

*For chemical structure information, please refer to the cited references.

MSDS Documentation

1689552-89-3 - DABNA-1 chemical structure - 5,9-diphenyl-5,9-diaza-13b-boranaphtho[3,2,1-de]anthraceneCzBN MSDS Sheet

Literature and Reviews

  1. Solution-processed multi-resonance organic light-emitting diodes with high efficiency and narrowband emission, S. Xu et al., Chinese Chem. Lett., 32, 1372–1376 (2021); DOI: 0.1016/j.cclet.2020.10.022.
  2. Investigating HOMO Energy Levels of Terminal Emitters for Realizing High-Brightness and Stable TADF-Assisted Fluorescence Organic Light-Emitting Diodes, Adv. Electron. Mater., Y. Lee et al., 7 (4), 2001090 (2021); DOI: 10.1002/aelm.202001090.
  3. Narrowband Emissive Thermally Activated Delayed Fluorescence Materials, H. Kim et al., Adv. Opt. Mater., 10, 2201714 (2022); DOI: 10.1002/adom.202201714.
  4. Tailor-Made Multi-Resonance Terminal Emitters toward Narrowband, High-Efficiency, and Stable Hyperfluorescence Organic Light-Emitting Diodes, Y. Lee et al., Adv. Opt. Mater., 10 (17), 2200682 (2022); DOI: 10.1002/adom.202200682.
  5. Anti-Stokes Luminescence in Multi-Resonance-Type Thermally-Activated Delayed Fluorescence Molecules, S. Kohata et l., Angew. Chem. Int. Ed., 135 (44), e202312326 (2023); DOI: 10.1002/ange.202312326.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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