N4,N4'-Bis(4-ethenylphenyl)-N4,N4'-di-1-naphthalenyl-[1,1'-biphenyl]-4,4'-diamine Chemical Properties

Boiling point:

825.3±65.0 °C(Predicted)

Density 

1.192±0.06 g/cm3(Predicted)

solubility 

THF: soluble
chloroform: soluble
toluene: soluble

pka

0.06±0.50(Predicted)

λmax

350 nm±5 nm in THF (UV)

InChIKey

WTEWXIOJLNVYBZ-UHFFFAOYSA-N

SMILES

C1(C2=CC=C(N(C3=CC=C(C=C)C=C3)C3=C4C(C=CC=C4)=CC=C3)C=C2)=CC=C(N(C2=CC=C(C=C)C=C2)C2=C3C(C=CC=C3)=CC=C2)C=C1

N4,N4'-Bis(4-ethenylphenyl)-N4,N4'-di-1-naphthalenyl-[1,1'-biphenyl]-4,4'-diamine Usage And Synthesis

Uses

N4,N4μ-Di(naphthalen-1-yl)-N4,N4μ-bis(4-vinylphenyl)biphenyl-4,4μ-diamine, also known as VNPB, is a solution-processable Hole Transport / Electron Blocking Layer (HTL / EBL) material popularly used in organic electronics, such as OLEDs and perovskite solar cells .
In OLED devices, the use of VNPB enabled the maximum current efficiency of 22.2 Cd/A, compared to 9.7 Cd/A in the reference device without VNPB, and the device lifetime was extended by up to 74.8% . VNPB allowed a simple and additive-free strategy to prevent the formation of defects in solution processed thin-film stacks made of small-molecular materials.
In solar cells, VNPB increased open-circuit voltage (VOC) and power conversion efficiency (PCE) of wide-bandgap perovskite solar cells by changing the hole transport layer (HTL) from commonly used poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine) (PTAA) to in-situ cross-linked small mol. VNPB . PCEs of 24.9% and 25.4% have been achieved in perovskite/perovskite and perovskite/silicon tandem solar cells, resp.