Publication date: 15th December 2025
The development of ever-increasing means of communication, such as 5G, and detection systems, such as military and civilian radars, is leading to an increase in the number of sources emitting electromagnetic waves and thus in strong electromagnetic pollution. This pollution can be the source of numerous interference problems between devices, as well as possible health problems. In that context, there is a strong need of new absorbent materials that are more effective and also over a wider frequency range. Hybrid perovskites (HPs), and in particular MAPI, are excellent dielectric materials displaying many polarisation modes that can be modulated according to frequency, making them excellent candidates for electromagnetic wave absorption (EMWA) application. However, EMWA testing requires a large quantity of powder to be dispersed within a polymeric matrix. Therefore, hybrid perovskites (HPs) were synthesised using mechanosynthesis, a solvent-free method that enables the production of large quantities of powders with good reproducibility and homogeneity. At first, we have studied the well-known 3D MAPbI3 phase as EMWA materials, demonstrated an effect of grinding time and of the powder size and evidenced a broad absorption peak at 12 GHz. However, this phase suffers from a poor air stability. We therefore decided to study other HPs compositions, such as CsPbBr₃ and MAPbBr₃, which have presented a higher stability and showed new interesting absorption properties at the X band in the range 6 to 13 GHz and also Ku band in the range 13 to 20 GHz. To better emphasize their absorbing properties, we have combined these HPs with carbon-based materials to introduce new dissipation mechanisms, particularly interfacial polarisation and charge dissipation networks. We have worked at first with graphene due to its conductive properties and its already proved ability to form effective interfaces with HPs. Tests were carried out to determine the best way to integrate graphene into the synthesis process, the optimal ratio, and how to sieve and disperse the resulting powder in a polymer matrix to analyse their EMWA properties. Optimized compositions and processes have allowed obtaining Reflection Loss lower than -10 dB.
The authors thank the "Agence Innovation Défense" for the PHD scholarship of Victor Denaud and the ANR for funding the ABPERO project.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.