t-Bu-ν-DABNA

Achieve High Efficiency OLEDs with a Blue Dopant Material

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

t-Bu-ν-DABNA (CAS number 2914070-28-1) is the derivative of v-DABNA. This material has two boron and six nitrogen atoms which knit 13 phenyl rings together to form a network of triphenylborons and triphenylamines. Two tert-butyl groups sit on the 4-positions of the phenyl rings as part of the two central triphenylamines. The introduction of these groups can effectively increase the intermolecular distance to reduce the unnecessary Dexter energy transfer (DET) and increase the PLQY by reducing the aggregation-caused self-quenching.

Demonstrating atomically separated frontier molecular orbital (FMO) distributions, the HOMO energy is located mainly on nitrogen atoms and LUMO located primarily on boron atoms.

An extremely narrow emission with full width at half maximum (FWHM) of 14 nm was observed for the photoluminescence of t-Bu-ν-DABNA in toluene. The emission peaked at 467 nm in toluene solution. With 5% doping in dibenzo[b,d]furan-2,8-diylbis(diphenylphosphine oxide), host exhibited enhanced PLQY value of 91.9%.

A pure blue hyperfluorescent device, with mMDBA-DI as a TADF sensitized host and t-Bu-ν-DABNA as a fluorescence emitter, exhibited a high external quantum efficiency (EQE) of 40.7%, along with narrow emission with full width at half maximum (FWHM) of 19 nm (CIE y=0.15).

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 (50 nm)/HATCN (7 nm)/TAPC (50 nm)/DCDPA (10 nm)/DBFPO:30% pMDBA-DI*:1 wt% t-Bu-v-DABNA (25 nm)/DBFPO (5 nm)/TPBi (20 nm)/LiF (1.5 nm)/Al (100 nm) [1]
Colour	Blue emission (0.13, 0.19) at 474 nm with an FWHM of 19 nm
Max Current Efficiency	39.4 cd/A
Max EQE	37.6%

Device Structure	ITO (50 nm)/HATCN (7 nm)/TAPC (50 nm)/DCDPA (10 nm)/DBFPO:30% mMDBA-DI*:1 wt% t-Bu-v-DABNA (25 nm)/DBFPO (5 nm)/TPBi (20 nm)/LiF (1.5 nm)/Al (100 nm) [1]
Colour	Blue emission (0.12, 0.15) at 474 nm with an FWHM of 19 nm
Max Current Efficiency	31.6 cd/A
Max EQE	40.7%

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

MSDS Documentation

t-Bu-ν-DABNA MSDS Sheet

Literature and Reviews

1. Achieving High Efficiency and Pure Blue Color in Hyperfluorescence Organic Light Emitting Diodes using Organo-Boron Based Emitters, K. Naveen et al., Adv. Funct. Mater., 32 (12), 2110356 (2022); DOI: 10.1002/adfm.202110356.
   
2. Forthcoming hyperfluorescence display technology: relevant factors to achieve high-performance stable organic light emitting diodes, Y. Gawale et al., Front. Chem., 11, 1211345 (2023); DOI: 10.3389/fchem.2023.1211345.
   
3. Multiresonant TADF materials: triggering the reverse intersystem crossing to alleviate the efficiency roll-off in OLEDs, K. Naveen et al., Chem. Commun., 59, 3685-3702 (2023); DOI: 10.1039/d2cc06802h.