2-TNATA

CAS Number 185690-41-9

Charge Transport Layer Materials, High Purity Sublimed Materials, Hole Injection Layer Materials, Hole Transport Layer Materials, Materials, OLED Materials, Semiconducting Molecules

MSDS

2-TNATA, HIL material for OLEDs

Sublimed and unsublimed grades are available for 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 Alq₃based 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*	λ_max 326 nm (THF)
Fluorescence	λ_em 490 nm (THF)
HOMO/LUMO	HOMO = 5.1 eV, LUMO = 2.2 eV
Synonyms	2-TNATA 2TNATA 2T-NATA 4,4′,4′′-Tris[2-naphthyl(phenyl)amino] triphenylamine
Classification / Family	Triphenylamine derivatives, Hole-injection materials, Hole-transporting materials, Light-emitting diodes

* Measurable with an USB 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.

Chemical Structure

2-TNATA structure — Chemical Structure of 2-TNATA

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	£230
Unsublimed (>98.0% purity)	M612	1 g	£220
Sublimed (>99.0% purity)	M611	1 g	£370
Unsublimed (>98.0% purity)	M612	5 g	£660
Sublimed (>99.0% purity)	M611	5 g	£1400

MSDS Documentation

2-TNATA MSDS sheet

Literature 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.
Advantages and disadvantages of vacuum-deposited and spin-coated amorphous organic semiconductor films for organic light-emitting diodes, M. Shibata et al., J. Mater. Chem. C, 3, 11178-11191 (2015); DOI: 10.1039/C5TC01911G.