NPNPB


Order Code: M2182A1
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Pricing

Grade Order Code Quantity Price
Sublimed (>99% purity) M2182A1 500 mg £199.00
Sublimed (>99% purity) M2182A1 1 g £339.00

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 for OLED devices page.

npnpb, 936355-01-0
Chemical structure of NPNPB; CAS No. 936355-01-0.

Applications

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.

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
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
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
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
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
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
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
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.

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.