The Effect of 600 keV Ag Ion Irradiation on the Structural, Optical, and Photovoltaic Properties of MAPbBr 3 Films for Perovksite Solar Cell Applications.

A competitive new technology, organic metallic halide perovskite solar cells feature a wide working area, low manufacturing costs, a long lifespan, and a significant amount of large efficacy of power conversion (PCE). The spin-coating technique was utilized for the fabrication of pure CH 3 NH 3 PbBr 3 (MAPbBr 3 ) thin films, and these films are implanted with 600 keV silver (Ag) ions at fluency rate of 6 × 10 14 and 4 × 10 14 ions/cm 2 . XRD analysis confirmed the cubic structure of MAPbBr 3 . A high grain size was observed at the fluency rate of 4 × 10 14 ions/cm 2 . The UV-Vis spectroscopic technique was used to calculate the optical properties such as the bandgap energy (E g ), refractive index (n), extinction coefficients (k), and dielectric constant. A direct E g of 2.44 eV was measured for the pristine film sample, whereas 2.32 and 2.36 eV were measured for Ag ion-implanted films with a 4 × 10 14 and 6 × 10 14 ions/cm 2 fluence rate, respectively. The solar cells of these films were fabricated. The J sc was 6.69 mA/cm 2 , FF was 0.80, V oc was 1.1 V, and the efficiency was 5.87% for the pristine MAPbBr 3 -based cell. All of these parameters were improved by Ag ion implantation. The maximum values were observed at a fluency rate of 4 × 10 14 ions/cm 2 , where the V oc was 1.13 V, FF was 0.75, J sc was 8.18 mA/cm 2 , and the efficiency was 7.01%.