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Product Code M2429A1-250mg
Price £350 ex. VAT

Blue Dopant Material with Boron-based triarylamines

High purity sublimed narrowband multi-resonance thermally activated delayed fluorescent (MR-TADF) emitter for highly efficient OLEDs

DABNA-1, namely 5,9-diphenyl-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracene, has a rigid polycyclic aromatic framework containing a triphenyl boron core and two nitrogen atoms that are connecting all five phenyl rings. Structurally, DABNA-1 also can be considered as two triphenyl amines that has one common phenyl ring which is joined by two other neighbouring phenyl rings with a boron to form a triphenyl boron central core. DABNA-1 was one of the first developed multi-resonance thermally activated delayed fluorescence (MR-TADF) materials containing one boron atom and two nitrogen atom with boron and nitrogen exhibiting the opposite resonance effect.

DABNA-1 exhibited deep blue emission with photoluminescence quantum efficiency (PLQY) and singlet–triplet energy splitting (ΔEST) of 0.88 and 0.18 eV in 1 wt.% doped mCBP film. Deep blue OLED devices based on DABNA-1 showed high efficiency with an EQE value of 13.5% and a colour coordinate of (0.13, 0.09), along with high colour purity of very narrow EL spectra full width at half maximum (FWHM) of 28 nm at 459 nm. Though showing high efficiency roll-off, DABNA-1 and its derivatives are promising candidates for developing high colour purity, high efficiency deep blue TADF-OLEDs.

General Information

CAS number 1689552-89-3
Chemical formula C30H21BN2
Molecular weight 420.31 g/mol
Absorption* λmax 437 nm (in DCM)
Fluorescence λem 462 nm (film)
HOMO/LUMO HOMO = 5.58 eV, LUMO = 2.91 eV (ΔEST = 0.18 eV)
Synonyms 5,9-Diphenyl-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracene
Classification / Family Triarylamine derivatives, Blue dopant, Multiresonance thermally activated delayed fluorescent (MR-TADF), Sublimed materials.

Product Details

Purity Sublimed* >99% (HPLC)
Melting point n.a.
Appearance Bright yellow powder

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

Chemical Structure

1689552-89-3 - DABNA-1 chemical structure
5,9-Diphenyl-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracene (DABNA-1) chemical structure, 1689552-89-3

Device Structure(s)

Device structure ITO (50 nm)/NPD (40 nm)/TCTA (15 nm)/mCP (15 nm): 1 wt% DABNA-1/mCBP (20 nm)/TSPO1* (40 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour blue light emitting device Deep blue (0.13, 0.09), emission at 459 nm with an FWHM of 28 nm
Max Current Efficiency 10.6 cd/A 
Max EQE 13.15%

 *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]anthraceneDABNA-1 MSDS Sheet

Literature and Reviews

  1. Ultrapure Blue Thermally Activated Delayed Fluorescence Molecules: Efficient HOMO–LUMO Separation by the Multiple Resonance Effect, T. Hatakeyama et al., Adv. Mater., 28 (14); 2777-2781 (2016); DOI: 10.1002/adma.201505491.
  2. Ternary Exciplexes for High Efficiency Organic Light-Emitting Diodes by Self-Energy Transfer, S. Jeon et al., Adv. Opt. Mater., 7 (5), 1801462 (2019); DOI: 10.1002/adom.201801462.
  3. Triptycene-Fused Sterically Shielded Multi-Resonance TADF Emitter Enables High-Efficiency Deep Blue OLEDs with Reduced Dexter Energy Transfer, H. Mubarok et al., 135 (32), e202306879 (2023); DOI: 10.1002/ange.202306879.
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