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Product Code M611-500mg
Price £230 ex. VAT

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 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/m[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
  • 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 optical spectrometer, see our spectrometer application notes.

Product Details


>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 green light emitting device
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 deep blue light emitting device
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 white light emitting device
Max. EQE 17.5%
Max. Luminance 12,930 cd/m(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 red light emitting device
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 white light emitting device
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 white light emitting device
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 green light emitting device
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.


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


Literature and Reviews

  1. 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.
  2. 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.
  3. 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).
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