Enhanced low-frequency microwave absorption using MAPbI₃@rGO nanocomposites

MAPbI₃@rGO nanocomposites were synthesized and incorporated into an epoxy matrix to develop a robust material with enhanced microwave absorption properties. Structural and morphological analyses using XRD, FTIR, FE-SEM, HR-TEM, and XPS confirmed the successful formation of the MAPbI₃@rGO composites, revealing uniform dispersion of MAPbI₃ nanoparticles on rGO sheets, reduced particle size, and consistent elemental composition. The performance of MAPbI₃@rGO composite was evaluated in the X-band with a frequency range (8.2–12.4 GHz), showing a significant improvement in microwave absorption with the inclusion of reduced graphene oxide (rGO). The as-obtained perovskite, amalgamated with rGO exhibits an extremely low reflection loss value of −83 dB at 8.7 GHz when the absorber thickness is 4 mm, ranking it as one of the most attractive absorbers reported to date. The MAPbI₃@rGO composite demonstrates an impressive broadband response, covering a wide frequency range of 8–10 GHz, making it highly suitable for advanced high-frequency applications. Mechanisms, including dielectric loss, various internal reflections, effective impedance matching, and synergistic interactions within the composite structure, are responsible for the observed enhanced absorption performance. These results highlight the potential of materials based on MAPbI₃@rGO for applications involving microwave absorption.