IMF2017

Organic molecular ferroelectrics are highly desirable due to their numerous advantages such as eco-friendly, light-weight, cost-effective, scalability, and low processing temperatures. The recent discovery of ferroelectricity in organic diisopropylammonium bromide - C₆H₁₆NBr (DIPAB) single crystal renewed interest on this compound because of its large polarization (23 μC/cm²) and good thermal stability (from 426 K down to liquid nitrogen temperature). In the present study, we have modified DIPAB with fluorine doping at bromine site. The resultant fluorine modified DIPAB polycrystalline samples are explored for their structural, thermal, dielectric properties. The Rietveld refinement has been done on the X-ray diffraction patterns to understand the structural properties whereas the dielectric and impedance spectroscopy are used to explore the dielectric relaxation in the samples. The different contributions for the dielectric relaxation and ac conductivity have been understood.