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Product Code M2193A1
Price £261.00

Bearing four triarylamine units, DNTPD is electron rich and normally used as hole transport or hole injection layer material in OLED and perovskite solar cell devices. It is an extended structure of TPD and NPB that is widely used in organic electronics.

DNTPD layer at ITO interface can reduce the hole injection barrier while at the same time improve the current efficiency by balancing the holes and electrons in the emitting layer of an OLED device.

General Information

CAS number 199121-98-7
Full name N1,N1'-(Biphenyl-4,4'-diyl)bis(N1-phenyl-N4,N4 -di-m-tolylbenzene-1,4-diamine
Chemical formula C64H54N4
Molecular weight 879.1 g/mol
Absorption λmax 326 nm in DCM
Fluorescence λem 473 nm in DCM
HOMO/LUMO HOMO = 5.1 eV, LUMO = 2.1 eV [1]
Synonyms N,N'-Bis{4-[bis(3-methylphenyl)amino]phenyl}-N,N'-diphenyl-4,4'-biphenyldiamine
Classification / Family Triarylamines, Organic electronics, Hole-injection layer materials (HIL), Hole transport layer (HTL) materials, Sublimed materials.

Product Details

Purity Sublimed: >99% (HPLC)
Melting point TGA: >250 °C (0.5% weight loss)
Appearance Yellow powder/crystals

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials for OLED devices page.

Chemical Structure

Sublimed DNTPD structure
Chemical structure of DNTPD

Device Structure(s)

Device structure ITO/DNTPD (40nm)/Bebq2:Ir(mphmq)2(tmd) (3%, 30 nm)/Bebq2 (20 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour Red  red
Max. Power Efficiency 32.0 lm W-1 
Max. Current Efficiency 30.1 cd/A 
Max. EQE 24.6%
Device structure ITO/DNTPD (40nm)/Bebq2:Ir(mphmq)2acac (3%, 30 nm)/Bebq2 (20 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour Red  red
Max. Power Efficiency 32.7 lm W-1 
Max. Current Efficiency 29.1 cd/A 
Max. EQE 22.2%
Device structure ITO (150 nm)/DNTPD (60 nm)/NPB (20 nm)/mCP (10 nm)/mCPPO1:FCNIrpic (30 nm, 3 %)/TSPO1(20 nm)/LiF (1 nm)/Al (200 nm) [3]
Colour Blue  blue
Power Efficiency@100 cd/cm2 19.7 lm W-1 
EQE@100 cd/cm2 22.3%
Device structure ITO (150nm)/DNTPD (60 nm)/NPB (5 nm)/FPCA (10 nm)/mCPPO1*:FCNIrpic (30 nm, 3%)/TSPO1* (25 nm)/LiF(1 nm)/Al(200 nm) [4]
Colour Blue  blue
Max. Power Efficiency 25.2 lm W-1 
Max. Current Efficiency 26.0 cd/A 
Max. EQE 22.0%
Device structure ITO (150 nm)/DNTPD (60 nm)/NPB (20 nm)/FPCA (10 nm)/BSFM*:Ir(ppy)3/TSPO1 (25 nm)/LiF (1 nm)/Al (200 nm) [4]
Colour Green green
Max. Power Efficiency 58.5 lm W-1 
Max. Current Efficiency 79.0 cd/A 
Max. EQE 24.5%

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


Grade Order Code Quantity Price
Sublimed (>99% purity) M2193A1 250 mg £261.00
Sublimed (>99% purity) M2193A1 500 mg £418.00
Sublimed (>99% purity) M2193A1 1 g £669.00

MSDS Documentation


Literature and Reviews

  1. Blue Phosphorescent Organic Light-Emitting Devices with the Emissive Layer of mCP:FCNIr(pic), J. Jang et al., Adv. Mater. Sci. & Eng., 192731 (2012); doi:10.1155/2012/192731.
  2. Highly Efficient Red Phosphorescent Dopants in Organic Light-Emitting Devices, D. Kim et al., Adv. Mater., 23, 2721–2726 (2011); DOI: 10.1002/adma.201100405.
  3. External Quantum Effi ciency Above 20% in Deep Blue Phosphorescent Organic Light-Emitting Diodes, S. Jeon et al., Adv. Mater., 23, 1436–1441 (2011); DOI: 10.1002/adma.201004372.
  4. Indolo Acridine-Based Hole-Transport Materials for Phosphorescent OLEDs with Over 20% External Quantum Efficiency in Deep Blue and Green, M. Park et al., Chem. Mater., 23, 4338–4343 (2011); doi: 10.1021/cm201634w.
  5. The Real Role of 4,4'-Bis[N-[4-{N,N-bis(3-methylphenyl)amino}phenyl]-Nphenylamino]biphenyl (DNTPD) Hole Injection Layer in OLED: Hole Retardation and Carrier Balancing, H. Oh et al., Bull. Korean Chem. Soc., 35 (3) 929; dio: 10.5012/bkcs.2014.35.3.929.

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.

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