Order Code: M612
MSDS sheet


(excluding Taxes)



 Grade Order Code Quantity Price
Sublimed (>99.6% purity) M611 250 mg £118
Sublimed (>99.6% purity) M611 500 mg £184
Unsublimed (>99.5% purity) M612 1 g £109
Sublimed (>99.6% purity) M611 1 g £292
Unsublimed (>99.5% purity) M612 5 g £377

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


Product Details


Sublimed* >99.6%

Unsublimed >99.5%
Melting point 246-248 °C (lit.)
Colour Pale yellow to yellow powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals, mainly to filter out trace metals and inorganic impurities. Sublimation happens under certain pressure for chemicals to only go through two physical stages: from a solid state to vapour (gas), and when vapour condenses to a solid state on a cool surface (referred to as cold finger). The most typical examples of sublimation are iodine and dry ice. For more details about sublimation, please refer to sublimed materials for OLEDs and perovskites and our collection of sublimed materials.


Chemical Structure

chemical structure of 2-tnata
Chemical Structure of 2-TNATA; CAS No. 185690-41-9; Chemical formula C66H48N4.



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 Alqbased 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].


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
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 W1
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  dellp 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 W1
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
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
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
Max. Luminance  14,500 cd/m2
Max. Power Efficiency  1.4 lm W1
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
Max. EQE 2.47%
Max. Luminance  64,200 cd/m2
Max. Power Efficiency  4.27 lm W1
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
Current Efficiency for 20 mA/cm2 62.6 cd/A
Power Efficiency for 20 mA/cm2 61.4 lm W1

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


hplc 2-tnata

HPLC trace of 4,4′,4′′-Tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA), sublimed.

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). dx.doi.org/10.1021/am2006383.
  4. 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.
  5. 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. High-Efficiency Green Phosphorescent Organic Light-Emitting Devices, L. Li et al., ICEOE, V4-96-97 (2011); DIO:10.1109/ICEOE.2011.6013434