NPNPB
CAS Number 936355-01-0
Electron / Hole Transport Layer Materials, High Purity Sublimed Materials, Materials, Semiconducting Molecules
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 |
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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) |
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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
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] |
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Colour | 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] |
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Colour | 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] |
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Colour | 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] |
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Colour | 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] |
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Colour | 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] |
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Colour | 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] |
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Colour | 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.
Pricing
Grade | Order Code | Quantity | Price |
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Sublimed (>99% purity) | M2182A1 | 500 mg | £260 |
Sublimed (>99% purity) | M2182A1 | 1 g | £440 |
MSDS Documentation
Literature and Reviews
- 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.
- 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.
- Efficient delayed fluorescence via triplet–triplet annihilation for deep-blue electroluminescence, P. Chou et al., Chem. Commun., 50, 6869 (2014); DOI: 10.1039/c4cc01851f.