NPB (NPD)
CAS Number 123847-85-8
Electron / Hole Transport Layer Materials, High Purity Sublimed Materials, Perovskite Interface Materials, Perovskite Materials, Semiconducting Molecules
NPB, chemical with outstanding hole transport capability
Enhances device morphology and is beneficial for device longevity
N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine, also known as NPB or NPD, has been used intensively in OLEDs and other organic electronic devices such as polymer photovoltaics (OPV) and perovskite solar cells for its outstanding hole transport capability.
![NPB (NPD) from Ossila was used in the high-impact paper (IF 7.059)](https://cdn.shopify.com/s/files/1/0823/0287/files/review-paper-icon_50x.png?v=1613159723)
NPB (NPD) from Ossila was used in the high-impact paper (IF 7.059), Synergistic effects of charge transport engineering and passivation enabling efficient inverted perovskite quantum-dot light-emitting diodes, J. Pan et al., J. Mater. Chem. C, 8, 5572-5579 (2020); DOI: 10.1039/D0TC00661K.
NPB is considered as one of the best materials within its competition, and has become the most common-used material in OLEDs' application. This is due to its increased Tg up to 95 °C, which enhances device morphology and is beneficial for device longevity [1].
General Information
CAS number | 123847-85-8 |
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Chemical formula | C44H32N2 |
Molecular weight | 588.74 g/mol |
HOMO/LUMO | HOMO = 5.5 eV, LUMO = 2.4 eV |
Absorption* | λmax 339 nm |
Fluorescence | λem 450 nm (in THF) |
Synonyms |
|
Classification / Family | Triphenylamines, Naphtalene, Hole-transport layer materials, Electron block layer materials, Hole-injection layer materials, Organic light-emitting diodes (OLEDs), OFETs, Organic Photovoltaics, Polymer solar cells, Perovskite solar cells |
* Measurable with an optical spectrometer, see our spectrometer application notes.
Product Details
Purity |
> 99.5% (sublimed) > 98.0% (unsublimed) |
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Melting point | 279-283 °C (lit.) |
Appearance | Off-White powder |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.
Chemical Structure
![NPB NPD chemical structure](http://cdn.shopify.com/s/files/1/0823/0287/files/NPB_3c78295d-9c31-4def-a3a2-b9c17a88e06a_240x158.png?12541175743611099062)
Device Structure(s)
Device structure |
ITO/NPB (30 nm)/NPB: DCJTB: C545T* (10 nm)/NPB (4 nm)/DNA (8 nm)/(BCP) (9 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm) [2] |
Colour | White ![]() |
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Max. Luminance | 13,600 cd/m2 |
Max. Current Efficiency | 12.3 cd/A |
Max. Power Efficiency | 4.4 lm W−1 |
Device structure |
ITO/MoO3 (7nm)/NPB (85 nm)/ (PPQ)2Ir(acac):Ir(ppy)3:FIrpic:mCP/TAZ/LiF/Al [3] |
Colour | White ![]() |
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Max. EQE | 20.1% |
Max. Power Efficiency | 41.3 lm W−1 |
Device structure | ITO/PEDOT:PSS/NPB/mCP/FPt*(1.5 nm)/OXD-7/CsF/Al [4] |
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Colour | White ![]() |
Max. EQE | 17.5% |
Max. Power Efficiency | 45 lm W−1 |
Device structure | ITO/2-TNATA:33% WO3 (100 nm)/NPB (10 nm)/Alq3 (30 nm)/Bphen (20 nm)/BPhen: 2% Cs (10 nm)/Al (150 nm) [5] |
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Colour | Green ![]() |
Operating Voltage for 100 cd/m2 | 3.1 V |
Current Efficiency for 20 mA/cm2 | 4.4 cd/A |
Power Efficiency for 20 mA/cm2 | 3.3 lm W−1 |
Device structure | ITO/2-TNATA (60 nm)/NPB (15 nm)/TAT* (30 nm)/ Alq3 (30 nm)/LiF (1 nm)/Al (200 nm) [6] |
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Colour | Deep Blue ![]() |
EQE at 10 mA/cm2 | 7.18 |
Current Efficiency at 10 mA/cm2 | 3.64 cd/A |
Power Efficiency at 10 mA/cm2 | 1.87 lm W−1 |
Device structure | ITO/[F4-TCNQ(x nm)/m-MTDATA(y nm)]n/NPB/Alq3/Bphen/Cs2CO3/Al [7] |
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Colour | Green ![]() |
Max. Luminance | 23,500 cd/m2 |
Max. Current Efficiency | 7.0 cd/A |
Max. Power Efficiency | 4.46 lm W−1 |
Device structure | ITO/NPB (30 nm)/CBP:8 wt% (t-bt)2Ir(acac)* (15 nm)/ BPhen(35 nm)/LiF (1 nm)/CoPc:C60 (4:1) (5 nm)/ MoO3 (5 nm)/NPB(30 nm)/CBP:8 wt% (t-bt)2Ir(acac)* (15 nm)/ BPhen (35 nm)/Mg:Ag (100 nm) [8] |
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Colour | Yellow ![]() |
Max. EQE | 16.78% |
Max. Luminance | 42,236 cd/m2 |
Max. Current Efficiency | 50.2 cd/A |
Max. Power Efficiency | 12.9 lm W−1 |
Device structure | ITO/NPB (60 nm)/BNA:2 wt% perylene and 0.5 wt% DCJTB* (35 nm)/Alq3 (25 nm)/Mg:Ag (200 nm) [9] |
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Colour | White ![]() |
Max. Luminance | 4,100 cd/m2 |
Max. Current Efficiency | 1.65 cd/A |
Device structure | ITO (100 nm)/NPB (40 nm)/ADN:C6:DCJTB (30 nm)/Alq (30 nm)/LiF (1 nm)/Al (100 nm) |
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Colour | Red ![]() |
Max. Luminance | 13, 000 cd/m2 [10] |
Max. Current Efficiency | 4.9 cd/A |
*For chemical structure information please refer to the cited references.
Characterisation
![1H NMR of N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine NPB](http://cdn.shopify.com/s/files/1/0823/0287/files/NPB-NMR_480x206.png?9449450610957474074)
![HPLC trace of NPB](http://cdn.shopify.com/s/files/1/0823/0287/files/npb-hplc_480x406.png?9846605503359967671)
Pricing
Grade | Order Code | Quantity | Price |
---|---|---|---|
Sublimed (>99%) | M361 | 1 g | £180 |
Sublimed (>99%) | M361 | 5 g | £480 |
Unsublimed (>98%) | M362 | 5 g | £210 |
MSDS Documentation
Literature and Reviews
- Organic electroluminescent devices with improved stability, S. A. Van Slyke et al., Appl. Phys. Lett. 69, 2160 (1996); http://dx.doi.org/10.1063/1.117151.
- High efficiency white organic light-emitting devices by effectively controlling exciton recombination region, F. Guo et al., Semicond. Sci. Technol. 20, 310–313 (2005).
- Manipulating Charges and Excitons within aSingle-Host System to Accomplish Efficiency/CRI/Color-Stability Trade-off for High-PerformanceOWLEDs, Q. Wang et al., Adv. Mater., 21, 2397–2401 (2009).