3tPAB

Blue Dopant Material for Highly Efficient OLEDs

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

3tPAB (CAS number 2056877-25-7) 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 (EQE_max) 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

Product Details

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

Chemical Structure

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	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 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 emission (0.327, 0.406)
Max Current Efficiency	53.5 cd/A
Max. Power Efficiency	57.8 lm/W
Max EQE	22.3%

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

MSDS Documentation

3tPAB 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.