FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code M2193A1-250mg
Price £340 ex. VAT

DNTPD, HTL and HIL material in OLED and perovskite solar cell devices

Used to improve the current efficiency at ITO interface

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 are 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-benzenediamine
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.

* Measurable with an optical spectrometer, see our spectrometer application notes.

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, see sublimed materials.

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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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 light emitting device
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 £340
Sublimed (>99% purity) M2193A1 500 mg £560
Sublimed (>99% purity) M2193A1 1 g £900

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.
Return to the top