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Related Experiment Video

Updated: Aug 9, 2025

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Optical Sensing Capability Evaluation for Methylammonium Based Perovskites for Explosive.

Rajat Sikka1, Pawan Kumar2

  • 1Materials Application Research Lab, Department of Nano Sciences and Materials, Central University of Jammu, 181143, Jammu, India.

Journal of Fluorescence
|February 22, 2023
PubMed
Summary

Methylammonium halide perovskites (MHPs) like MAPbBr3 and MAPbI3 were synthesized. MAPbBr3 shows superior optical sensing for nitrobenzene in hexane, indicating its potential as an excellent sensing material.

Keywords:
MAPbBr3MAPbI3NitrobenzenePerovskitessensing

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Area of Science:

  • Materials Science
  • Chemical Sensing
  • Photophysics

Background:

  • Methylammonium halide perovskites (MHPs) are promising materials for various applications.
  • Understanding their optical properties is crucial for developing sensing technologies.

Purpose of the Study:

  • To synthesize and characterize two MHPs: MAPbBr3 and MAPbI3.
  • To evaluate and compare the optical sensing capabilities of these MHPs.
  • To investigate the potential of MAPbBr3 as a sensing material for nitrobenzene.

Main Methods:

  • Synthesis of MAPbBr3 and MAPbI3 at room temperature.
  • Characterization using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and photoluminescence (PL).
  • Comparative optical sensing evaluation in different solvents using PL.

Main Results:

  • Successful synthesis and characterization of both MAPbBr3 and MAPbI3.
  • MAPbBr3 demonstrated superior optical sensing performance compared to MAPbI3 specifically in hexane.
  • MAPbBr3 exhibited excellent sensing capabilities for nitrobenzene in hexane, with R-squared of 0.87, selectivity of 16.9%, and a Stern-Volmer constant (Ksv) of 10^-2 × 0.464.

Conclusions:

  • MAPbBr3 is a highly effective optical sensing material for nitrobenzene in hexane.
  • The study highlights the potential of MHPs, particularly MAPbBr3, in developing selective chemical sensors.
  • Further research into MHP-based sensors is warranted for environmental monitoring and other applications.