NPNPB

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

Product Details

*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]
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.

Pricing

MSDS Documentation

NPNPB MSDS sheet

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.