NPNPB
CAS Number 936355-01-0
Electron / Hole Transport Layer Materials, High Purity Sublimed 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.