Influence of 100 MeV Au~(+8) ion on photovoltaic response of BiFeO_3/BaTiO_3 multilayer structures

摘要

This work presents the swift heavy ion (SHI) irradiation induced possible modifications in structural strain and surfacemorphology of (BiFeO3) BFO/(BaTiO3) BTO multilayer structures prepared by chemical solution deposition technique. Furthermore, the role of structural defects (induced due to irradiation) on the ferroelectric property and photovoltaic response of BFO/ BTO multilayer structures having different number of layers has been studied. Significant modifications in the morphological and ferroelectric properties of BFO/ BTO (two, four and six layers) multilayer structures due to induced structural defects were observed after SHI irradiation performed using 100 MeV Au+8 ion with ion fluence of similar to 1 x 10(12), 1 x 10(13) and 3 x 10(13) ions/cm(2). Ferroelectric photovoltaic response decreases with increase in ion fluence from 1 x 10(12) to 1 x 10(13) ions/cm(2) along with change in open circuit voltage from 0.41 V to 0.23 V, short circuit current density from 5.177 mu A/cm(2) to 1.71 mu A/cm(2) and Ion/Ioff ratio from 33.02 to 13.02. This study on effect of SHI irradiation on multilayer ferroelectric photovoltaic cell is important to understand the possible application of BFO/ BTO multilayer photovoltaic cells in the regions susceptible to radiations. Furthermore, the study of perovskite solar cell performance in the presence of SHI radiation, is essentially required for the development of durable solar energy harvesters. (C) 2016 Elsevier Ltd. All rights reserved.