Optical and electrical properties of oriented thin films of oligomer containing betaine‐type moiety in side chain

Abstract

Non-linear optical and electrical properties of polymer films obtained by dipole orientation of active units are reported. Novel polar oligomer with N-(indan-1,3-dion-2-yl)pyridinium betaine (IPB) as a side group is studied. Orientation of polar groups in oligomer thin films causes an increase of the photo-induced change of surface potential on irradiation in the region of photo-induced electron transfer (PIET) where the IPB group exhibits a reversible change of the value and sign of the dipole moment. At longer wavelengths, the value of the surface potential of the oligomer may be determined by transport of photogenerated charge carriers.

Photoinduced phenomena in corona poled polar organic films

“…As it is seen in Fig. 8, curves 1 and 2, several maximums in spectrum of photoinduced surface potential change DU s (hm) of IPB-3 in virgin and poled regions were observed [28]. The highest maximum of DU s is observed in poled samples at 375 nm close to PIET (¨390 nm) (see Fig.…”