Few-layer black phosphorus: A bright future in electromagnetic absorption

Few-layer black phosphorus (FL-BP) was prepared by liquid phase exfoliation (LPE) and composites with different weight ratio of FL-BP reveal high electromagnetic absorption (EA) performance in multi-frequency bands. A composite loaded with 30 wt.% of FL-BP showed the broadest effective EA at bandwidth of 6.20 GHz under the thickness of 2.5 mm. Furthermore, when the loading ratio increased to 50 wt.%, FL-BP based absorber has effective EA bandwidth in S (2-4 GHz) band.