Optical studies and dielectric response of [DMA]<sub>2</sub>MCl<sub>4</sub>(M = Zn and Co) and [DMA]<sub>2</sub>ZnBr<sub>4</sub>
Nadia Mahfoudh, K. Karoui, A. BenRhaiem
Abstract
of the dielectric permittivity were estimated. The variation of optical conductivity with the incident photon energy has also been studied. We employed impedance spectroscopy to thoroughly investigate the dipolar dynamics in the prepared materials. The evolution of the dielectric loss, as a function of frequency, showed a distribution of relaxation times, which probably could be of a Maxwell-Wagner type interfacial polarization relaxation, possibly attributed to grain boundary effects or blocking at the contacts. In fact, the current work opens an efficient path to high quality organic-inorganic halide perovskites with good optical properties, which makes them suitable for application in nonlinear optoelectronic devices.