Investigation on the critical factors of MoSe2-based microwave absorbing property

MoSe2 is a graphene-like material with hierarchical structure similar to MoS2, which is similar to many transition metal sulfides. Compared with MoS2, a widely used microwave absorber, MoSe2 possesses a narrower bandgap. Due to the high similarity between MoSe2 and MoS2, MoSe2 is considered as a dielectric loss type of microwave absorber. In recent years, layered, spherical and flower-like microstructures are popular due to their unique multi interface nanostructures and good interfacial loss ability. In this work, the relationship between MoSe2 with three morphological structures (MoSe2-NS, MoSe2-MS and MoSe2-NF), the introduction of C source and MAP were studied. MoSe2-NF has the best effective absorption bandwidth of electromagnetic wave, reaching 6.1 GHz (11.9 GHz-18.0 GHz) and the minimum RL value is - 38.5 dB, covering the whole Ku band. When the thickness of MoSe2/C is 1.7 mm, the corresponding effective absorption bandwidth (RL < - 10 dB) is as high as 6.2 GHz (11.8 GHz-18.0 GHz) and the minimum RL is - 43.1 dB.

Automated summary

MoSe2 is a material similar to graphene with a hierarchical structure and narrower bandgap compared to MoS2, making it a dielectric loss type microwave absorber. Among the different morphological structures studied, MoSe2-NF showed the best effective absorption bandwidth, covering the entire Ku band.