Hole Mobility Studies on Dehydrodivanillin based New Blue-green Emitting Poly(p-phenylenevinylenes)

New dehydrodivanillin based highly florescent blue-green emitting PPV oligomers have been synthesised and their hole mobilities were measured by fabricating the diode devices with structure Glass/ITO/oligomer/Al. These soluble materials have been fully characterized by UV, IR, thermal analysis, 1 H-NMR, 13 C-NMR and Raman spectroscopy. Their oligomeric characteristics have been assessed by MALDI-MS studies, while particle size measurements have been done using X-ray diffraction. The four oligomers are thermally stable and possess good film-forming properties. Their absorption spectra in the solution and thin film state show two strong absorptions at 200-240 and 400 nm while the emission spectra produced by excitation at 360 nm show max at 450 nm and 500 nm, respectively. Diodes devices fabricated using these materials show low turn-on voltage (~1V) and hole mobility, assuming the hole current to be space-charge limited, in range of 10 -3 -10 -4 cm 2 V -1 s -1 . *Correspondence