2-TNATA
4,4',4''-Tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA), a starburst type molecule, gives very homogeneous thin-films that are ideal as hole-injection layers due to its low ionisation potential (of around 5.1 eV [1]).
It has been demonstrated that p-i-n organic light-emitting diodes (OLEDs) incorporating a p-doped transport layer that comprises tungsten oxide (WO3) and 2-TNATA significantly improves hole injection and conductivity of the Alq3 based p-i-n OLEDs with long lifetime, low driving voltage (3.1 V), and high power efficiency (3.5 lm/W) at 100 cd/m2 [2].
General Information
| CAS number | 185690-41-9 |
| Chemical formula | C66H48N4 |
| Molecular weight | 897.11 g/mol |
| Absorption* | λmax 326 nm (THF) |
| Fluorescence | λem 490 nm (THF) |
| HOMO/LUMO | HOMO = 5.1 eV, LUMO = 2.2 eV |
| Synonyms |
|
| Classification / Family | Triphenylamine derivatives, Hole-injection materials, Hole-transporting materials, Light-emitting diodes |
* Measurable with an optical spectrometer, see our spectrometer application notes.
Product Details
| Purity |
>99.0% (sublimed) >98.0% (unsublimed) |
| Melting point | 246-248 °C (lit.) |
| Appearance | Pale yellow to yellow powder/crystals |
* 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/2-TNATA:33% WO3 (100 nm)/NPB (10 nm)/Alq3 (30 nm)/Bphen (20 nm)/BPhen: 2% Cs (10 nm)/Al (150 nm) [2] |
| Colour | Green 
|
| Operating Voltage for 100 cd/m2 | 3.1 V |
| Current Efficiency for 20 mA/cm2 | 4.4 cd/A |
| Power Efficiency for 20 mA/cm2 | 3.3 lm W−1 |
| Device structure | ITO/2-TNATA (60 nm)/NPB (15 nm)/TAT* (30 nm)/ Alq3 (30 nm)/LiF (1 nm)/Al (200 nm) [4] |
| Colour | Deep Blue 
|
| EQE at 10 mA/cm2 | 7.18 |
| Current Efficiency at 10 mA/cm2 | 3.64 cd/A |
| Power Efficiency at 10 mA/cm2 | 1.87 lm W−1 |
| Device structure |
ITO/2T-NATA (17 nm)/TPAHQZn* (25 nm)/NPBX* (15 nm)/BCP (8 nm)/ Alq3 (35 nm)/LiF (0.5 nm)/Al (120 nm) [6] |
| Colour | White 
|
| Max. EQE | 17.5% |
| Max. Luminance | 12,930 cd/m2 (12 V) |
| Max. Current Efficiency | 2.66 cd/A (10 V) |
| Device structure | ITO/2T-NATA (20 nm)/NPB (60 nm)/Zn(BTZ)2:Ir(DBQ)2(acac) (80 nm)/Alq3 (70 nm)/LiF (1nm)/Al (200 nm) [7] |
| Colour | Red 
|
| Max. Luminance | 25,000 cd/m2 |
| Max. Current Efficiency | 12 cd/A |
| Device structure | glass/Ag (100 nm)/ITO (90 nm)/2-TNATA (60 nm)/NPB (15 nm)/ DPVBi:DCJTB (1.2%, 30 nm)/Alq3 (20 nm)/Li (1.0 nm)/Al (2.0 nm)/Ag (20 nm)/ITO(63 nm)/SiO2 (42 nm) [8] |
| Colour | White 
|
| Max. Luminance | 14,500 cd/m2 |
| Max. Power Efficiency | 1.4 lm W−1 |
| Device structure |
glass/ITO (150 nm)/2-TNATA (60 nm)/NPB (15 nm)/DPVBi:DCJTB (20 nm, 0.08%)/Alq3 (35 nm)/Li (1.0 nm)/Al (100 nm) [9] |
| Colour | White
|
| Max. EQE | 2.47% |
| Max. Luminance | 64,200 cd/m2 |
| Max. Power Efficiency | 4.27 lm W−1 |
| Device structure | ITO (150 nm)/2T-NATA (25 nm)/NPB (5 nm) ITCTA (10 nm)/GD* 10 wt% doped GH* (20 nm)/ TPBi (30 nm)/ LiF (0.5 nm)/ AI (l00 nm) [10] |
| Colour | Green
|
| Current Efficiency for 20 mA/cm2 | 62.6 cd/A |
| Power Efficiency for 20 mA/cm2 | 61.4 lm W−1 |
*For chemical structure information, please refer to the cited references.
Pricing
| Grade | Order Code | Quantity | Price |
| Sublimed (>99.0% purity) | M611 | 500 mg | £177.00 |
| Unsublimed (>98.0% purity) | M612 | 1 g | £169.00 |
| Sublimed (>99.0% purity) | M611 | 1 g | £282.00 |
| Unsublimed (>98.0% purity) | M612 | 5 g | £508.00 |
| Sublimed (>99.0% purity) | M611 | 5 g | £1060.00 |
MSDS Documentation
2-TNATA MSDS sheetLiterature and Reviews
- Exciplex formation at the organic solid/solid interface and tuning of the emission color in organic electroluminescent devices, K. Okumoto et al., , J. Lumin. 87–89, 1171 (2000). doi:10.1016/S0022-2313(99)00584-0.
- Highly Power Efficient Organic Light-Emitting Diodes with a p-Doping Layer, C-C. Chang et al., Appl. Phys. Lett., 89, 253504 (2006); doi: 10.1063/1.2405856.
- Pure White Organic Light-Emitting Diode with Lifetime Approaching the Longevity of Yellow Emitter, J-H. Jou et al., ACS Appl. Mater. Interfaces, 3, 3134–3139 (2011). dx.doi.org/10.1021/am2006383.
- Exceedingly efficient deep-blue electroluminescence from new anthracenes obtained using rational molecular design, S-K. Kim et al., J. Mater. Chem., 18, 3376–3384 (2008). DOI: 10.1039/B805062G.
- Control of the Color Coordinates of Blue Phosphorescent Organic Light-Emitting Diodes by Emission Zone, S. H. Rhee et al., ECS Solid State Letters, 3 (3) R7-R10 (2014). DOI: 10.1149/2.003403ssl.
- White organic light-emitting devices based on novel (E)-2-(4-(diphenylamino) styryl)quinolato zinc as a hole- transporting emitter, G. Ding et al., Semicond. Sci. Technol. 24, 025016 (2009). stacks.iop.org/SST/24/025016.
- Effect of A Series of Host Material on Optoelectronic Performance of Red Phosphorescent OLED, H. Li et al., Chin. J. Luminance, 5, 585-589, 2009.
- White top-emitting organic light-emitting diodes using one-emissive layer of the DCJTB doped DPVBi layer, M. Kim et al., Thin Solid Films 516, 3590–3594 (2008); doi:10.1016/j.tsf.2007.08.078.
- High Efficiency White Organic Light-Emitting Diodes from One Emissive Layer, C. Jeong et al., Jpn. J. Appl. Phys., 46 (2), 806-809 (2007); http://iopscience.iop.org/1347-4065/46/2R/806.
- High-Efficiency Green Phosphorescent Organic Light-Emitting Devices, L. Li et al., ICEOE, V4-96-97 (2011); DIO:10.1109/ICEOE.2011.6013434.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.