t-Bu-ν-DABNA
CAS Number 2914070-28-1
MR-TADF Materials, TADF Blue Dopants, Blue Dopant Materials, TADF Dopant Materials,
Achieve High Efficiency OLEDs with a Blue Dopant Material
High purity sublimed narrowband multi-resonance TADF emitter with boron-based triarylamines, CAS No. 2914070-28-1, Sublimed ≥99.0%
t-Bu-n-DABNA (CAS number 2914070-28-1) is a derivative of n-DABNA with two extra bulky tert-butyl groups. 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 at 467 nmis observed for the photoluminescence of t-Bu-n-DABNA in toluene. 5% doping concentration in dibenzo[b,d]furan-2,8-diylbis(diphenylphosphine oxide) (PPF) exhibits enhanced PLQY value of 91.9%.
A pure blue hyperfluorescent device, with mMDBA-DI as a TADF sensitized host and t-Bu-n-DABNA as a fluorescence emitter, exhibits 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
| CAS Number | 2914070-28-1 |
|---|---|
| Chemical Formula | C86H70B2N6 |
| Molecular Weight | 1209.14 g/mol |
| Absorption* | λmax 457 nm (in toluene) |
| Fluorescence | λem 467 nm (in toluene) |
| HOMO/LUMO | HOMO = 5.54 eV, LUMO = 2.94 eV (ΔEST = 0.04 eV) |
| Synonyms | N7,N7,N13,N13,5,15-hexaphenyl-9,11-bis(4-(tert-butyl)phenyl)-5,9,11,15-tetrahydro-5,9,11,15-tetraaza-19b,20b-diboradinaphtho [3,2,1-de:1',2',3'-jk]pentacene-7,13-diamine |
| 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 | TGA: Td = 520 °C, DSC: Tg = 273 °C |
| Appearance | Yellow powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials for OLED devices.
Chemical Structure
![t-Bu-ν-DABNA - N7,N7,N13,N13,5,15-hexaphenyl-9,11-bis(4-(tert-butyl)phenyl)-5,9,11,15-tetrahydro-5,9,11,15-tetraaza-19b,20b-diboradinaphtho [3,2,1-de:1',2',3'-jk]pentacene-7,13-diamine chemical structure](https://www.ossila.com/cdn/shop/files/t-Bu-_-DABNA-chemical-structure-body.jpg)
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-n-DABNA (25 nm)/DBFPO (5 nm)/TPBi (20 nm)/LiF (1.5 nm)/Al (100 nm) [1] |
|---|---|
| Color |
 Blue light 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-n-DABNA (25 nm)/DBFPO (5 nm)/TPBi (20 nm)/LiF (1.5 nm)/Al (100 nm) [1] |
|---|---|
| Color |
Blue light 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-Literature and Reviews
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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.
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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.
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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.