Optical Sensing Capability Evaluation for Methylammonium Based Perovskites for Explosive

Here, we have synthesized methylammonium based two metal halide perovskites (MHP) such as MAPbBr₃, and MAPbI₃ using methylammonium bromide, methylammonium iodide, lead bromide, respective at room temperature under certain experimental conditions. All synthesized MHPs have been confirmed through X-ray diffraction technique (XRD), scanning electron microscope (SEM), Fourier transform infra-red (FTIR) and photoluminescence (PL) analysis. Afterward, comparative evaluation on optical sensing capability has been made for both MHPs using PL in different solvents. Importantly, we find out that MAPbBr₃ exhibit an excellent optical feature over MAPbI₃ in hexane only. Afterward, MAPbBr₃ has also been explored to know the sensing capability for nitrobenzene sensing. Our model study confirms that MAPbBr₃ is an excellent sensing material with R square (0.87), selectivity (16.9%) and Stern Volmer constant (K_sv=10^- 2 × 0.464) for nitrobenzene in hexane.