PREPARATION AND CHARACTERIZATION OF POLY[OCTYL 1,2-(2',2''-DITHIENYLACRYLATE)] THIN-FILMS

A new type of solution-processable conducting polymer poly[octyl 1,2-( 2',2 ''-dithienylacrylate)] (PODA) has been synthesised. Thin films of PODA have been developed using spin-coating techniques. The atomic fo rce microscopy image of the films is presented. The PODA thin films sh ow a conductivity variation from 10(-8) S cm(-1), when undoped, to 10( -3) S cm(-1) after doping. Temperature dependence of d.c. conductivity of PODA films are studied. Dielectric behaviour of PODA films as a fu nction of frequency, temperature and doping has been studied. The comp lex permittivity has been determined at frequencies between 1 kHz and 1 MHz and temperatures between 60 and 310 K for undoped polymer films and films doped with FeCl3.