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Product Code M2182A1-500mg
Price $325 ex. VAT

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NPNPB, ETL material for OLEDs and perovskite solar cells

Paired with electron acceptors to form exciplexes in highly efficient TADF-OLEDs


NPNPB, full name N,N'-diphenyl-N,N'-di-[4-(N,N-diphenyl-amino)phenyl]benzidine, is one of the family members of triarylamines. NPNPB is electron rich and can be used as an electron-transport layer material for OLEDs and perovskite solar cells. Due to its electron-donating nature, NPNPB is also used together with electron acceptors (such as PO-T2T) to form exciplexes in highly-efficient thermally activated delayed fluorescence OLEDs.

NPNPB is also introduced into the interface between ITO and NPB as a buffer layer. This works to smooth the ITO surface and lower the barrier to hole-charge injection.

General Information

CAS number 936355-01-0
Full name N,N'-diphenyl-N,N'-di-[4-(N,N-diphenyl-amino)phenyl]benzidine
Chemical formula C60H46N4
Molecular weight 823.03 g/mol
Absorption λmax 324 nm in THF
Fluorescence λem 450 nm in THF
HOMO/LUMO HOMO = 5.1 eV, LUMO = 3.0 eV [1]
Synonyms N,N'-Bis[4-(diphenylamino)phenyl]-N,N'-diphenyl-3,3'-biphenyldiamine
Classification / Family Triarylamines Organic electronics, Hole-transport layer materials (HTL), Hole-injection layer materials (HIL), TADF materials, Sublimed materials.

Product Details

Purity Sublimed: > 99% (HPLC)
Melting point TGA: >370 °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.

Chemical Structure

NPNPB structure
Chemical structure of NPNPB

Device Structure(s)

Device structure ITO/NPNPB (60 nm)/NPB (10 nm)/TCTA (10 nm)/BIQMCz*: Ir(piq)3 (4 wt%) (30 nm)/BAlq (30 nm)/LiF (1 nm)/Al (100 nm) [1]
Colour Red red light emitting device
Max. Power Efficiency 26.2 lm W-1
Max. EQE 23.3%
Max. Current Efficiency 27.1 cd/A
Device structure ITO/NPNPB (60 nm)/NPB (10 nm)/DMPPP:2 wt% 1bb* (30 nm)/BAlq (20 nm)/LiF (1 nm)/Al [2]
Colour Blue blue light emitting device
Max. Power Efficiency 4.23 lm W-1
Max. EQE 5.2%
Max. Current Efficiency 5.38 cd/A
Device structure ITO/NPNPB (60 nm)/NPB (10 nm)/DMPPP:2 wt% 2bb* (30 nm)/BAlq (20 nm)/LiF (1 nm)/Al [2]
Colour Blue blue light emitting device
Max. Power Efficiency 4.23 lm W-1
Max. EQE 4.72%
Max. Current Efficiency 5.87 cd/A
Device structure ITO/NPNPB (60 nm)/NPB (10 nm)/DMPPP:2 wt% 2bb* (30 nm)/BAlq (20 nm)/LiF (1 nm)/Al [2]
Colour Blue blue light emitting device
Max. Power Efficiency 4.23 lm W-1
Max. EQE 4.72%
Max. Current Efficiency 5.87 cd/A
Device structure ITO/NPNPB: 10% MoO3 (5 nm)/NPNPB (80 nm)/NPB (10 nm)/DMPPP: 5% TSTA* (25 nm)/BAlq2 (20 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Blue blue light emitting device
Max. Power Efficiency 5.7 lm W-1
Max. EQE 10.2%
Max. Current Efficiency 12.3 cd/A
Device structure ITO/NPNPB: 10% MoO3 (5 nm)/NPNPB (80 nm)/NPB (10 nm)/DMPPP: 5% TSMA* (25 nm)/BAlq2 (20 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Blue blue light emitting device
Max. Power Efficiency 8.7 lm W-1
Max. EQE 8.9%
Max. Current Efficiency 10.3 cd/A
Device structure ITO/NPNPB (50 nm)/NPB (10 nm)/DMPPP: PPIE (5 wt%) (25 nm)/BAlq (20 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour Blue blue light emitting device
Max. Power Efficiency 4.8 lm W-1
Max. EQE 8.1%
Max. Current Efficiency 10.0 cd/A

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

Pricing

Grade Order Code Quantity Price
Sublimed (>99% purity) M2182A1 500 mg £260
Sublimed (>99% purity) M2182A1 1 g £440

MSDS Documentation

NPNPB MSDSNPNPB MSDS sheet

Literature and Reviews

  1. Highly efficient deep-red organic electrophosphorescent devices with excellent operational stability using bis(indoloquinoxalinyl) derivatives as the host materials, T. Su et al., J. Mater. Chem. C, 1, 5084 (2013); DOI: 10.1039/c3tc30823e.
  2. Highly efficient deep-blue organic electroluminescent devices doped with hexaphenylanthracene fluorophores, S. Lin et al., J. Mater. Chem., 21, 8122 (2011); DOI: 10.1039/c1jm10424a.
  3. Efficient delayed fluorescence via triplet–triplet annihilation for deep-blue electroluminescence, P. Chou et al., Chem. Commun., 50, 6869 (2014); DOI: 10.1039/c4cc01851f.
  4. Synthesis of Diimidazolylstilbenes as n-Type Blue Fluorophores: Alternative Dopant Materials for Highly Efficient Electroluminescent Devices, H. Chou et al., Adv. Mater., 24, 5867–5871 (2012); DOI: 10.1002/adma.201202222.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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