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Product Code M2431A1-LT-500mg
Price $1,163 ex. VAT

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Blue Dopant Material for Highly Efficient OLEDs

High purity sublimed narrowband multi-resonance TADF with boron-based triarylamines


3tPAB is a multi-resonance thermally activated delayed fluorescence (MR-TADF) deep blue, high colour-purity emitter with six peripheral large steric hindrance tert-butyl units. These units supress the intermolecular interactions, thus to aggregation-induced emission (AIE) quenching, and improve the PLQY of emitter.

By using 1,3-di(9H-carbazol-9-yl)benzene (mCP) as the single host, a 3tPAB based device achieves a maximum external quantum efficiency (EQEmax) of 19.3%, CIE coordinates of (0.141, 0.076), and full-width at half-maximum (FWHM) of 26 nm.

3tPAB can also be used as as a sensitizer for blue traditional fluorescence and MR-TADF OLED devices to minimize the damage of high-energy absorption of the active materials. TADF-sensitized TADF (TST) devices, using 3tPAB as a sensitizer and MR-TADF compound PhDMAC-BN as an emitter, demonstrated maximum external quantum efficiency of 33.9% with efficient Förster energy transfer in high colour-purity.

General Information

CAS Number 2056877-25-7
Chemical Formula C66H78BN3
Molecular Weight 924.16 g/mol
Absorption* λmax
Fluorescence λem 458 nm (in film)
HOMO/LUMO HOMO = 5.09 eV, LUMO = 2.36 eV
Synonyms 2,12-Di-tert-butyl-N,N,5,9-tetrakis(4-(tert-butyl)phenyl)-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-7-amine
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

3tPAB - 2056877-25-7 - 2,12-di-tert-butyl-N,N,5,9-tetrakis(4-(tert-butyl)phenyl)-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-7-amine chemical structure
2,12-Di-tert-butyl-N,N,5,9-tetrakis(4-(tert-butyl)phenyl)-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-7-amine (3tPAB) chemical structure, 2056877-25-7.

Device Structure(s)

Device Structure ITO/MoO3 (10 nm)/TAPC (60 nm)/mCP (10 nm)/PPF:5 wt% 3tPAB (20 nm)/PPF (10 nm)/TmPyPB (30 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour blue light emitting device Deep blue emission (0.131, 0.085) at 460 nm with an FWHM of 29 nm
Max Current Efficiency 19.6 cd/A
Max. Power Efficiency 14.2 lm/W
Max EQE 25.8%

Device Structure ITO/MoO3 (6 nm)/CzSi (4 nm)/FSFA (40 nm)/BCzPh (10 nm)/mCBP (5 nm)/1 wt% DBP: DMIC-TRZ (10 nm)/3 wt% CzDBA:DMIC-TRZ (6 nm)/1 wt% 3tPAB:30 wt% CCO-2*:mCBP (12 nm)/SF3TRZ (10 nm)/DPPyA (40 nm)/LiF (1 nm)/Al [3]
Colour white light emitting device White emission (0.365, 0.468)
Max Current Efficiency 84.7 cd/A
Max. Power Efficiency 99.6 lm/W
Max EQE 30.8%

Device Structure ITO/MoO3 (6 nm)/CzSi (4 nm)/FSFA (40 nm)/BCzPh (10 nm)/mCBP (5 nm)/1 wt% DBP DMIC-TRZ (10 nm)/3 wt% 4CzIPNBu:DMIC-TRZ (6 nm)/1 wt% 3tPAB:30 wt% CCO-2*: mCBP (12 nm)/SF3TRZ (10 nm)/DPPyA (40 nm)/LiF (1 nm)/Al [3]
Colour white light emitting device White emission (0.327, 0.406)
Max Current Efficiency 84.7 cd/A
Max. Power Efficiency 99.6 lm/W
Max EQE 30.8%

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

MSDS Documentation

3tPAB - 2056877-25-7 - 2,12-di-tert-butyl-N,N,5,9-tetrakis(4-(tert-butyl)phenyl)-5,9-dihydro-5,9-diaza-13b-boranaphtho[3,2,1-de]anthracen-7-amine3tPAB MSDS Sheet

Literature and Reviews

  1. A periphery cladding strategy to improve the performance of narrowband emitters, achieving deep-blue OLEDs with CIEy < 0.08 and external quantum efficiency approaching 20%, Y. Wang et al., Org. Electron., 97, 106275 (2021); DOI: 10.1016/j.orgel.2021.106275.
  2. Multiple-Resonance-Type TADF Emitter as Sensitizer Improving the Performance of Blue Fluorescent Organic Light-Emitting Diodes, Y. Wang et al., Adv. Opt. Mater., 11 (1), 2202034 (2023); DOI: 10.1002/adom.202202034.
  3. Realizing High Efficiency and High Color Quality for All-Fluorescence White Organic Light-Emitting Diodes by Interlayer-Sensitizing Configuration with Electron-Capturing Agent, H. Liu et al., Adv. Funct. Mater., 33 (52). 2309770 (2023); DOI: 10.1002/adfm.202309770.

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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