Optical Sensing Capability Evaluation for Methylammonium Based Perovskites for Explosive.

Here, we have synthesized methylammonium based two metal halide perovskites (MHP) such as MAPbBr, and MAPbI 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 MAPbBr exhibit an excellent optical feature over MAPbI in hexane only. Afterward, MAPbBr has also been explored to know the sensing capability for nitrobenzene sensing. Our model study confirms that MAPbBr is an excellent sensing material with R square (0.87), selectivity (16.9%) and Stern Volmer constant (K=10 × 0.464) for nitrobenzene in hexane.