NPNPB

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General Information

Product Details

*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.

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
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
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
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
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
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
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
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.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.