Construction of MAPbBr3/EP composites with blocking path for high-performance gamma-rays shielding

As deep space exploration is getting further and further away, it is necessary to develop novel packaging shielding material with lightweight and high performance to improve the service life of spacecraft integrated circuits in space radiation environment. However, up to now, constructing a lightweight perovskite/epoxy composite packaging shielding material for spacecraft integrated circuits has not been reported. Hence, in this work, a novel MAPbBr3/epoxy (CH3NH3PbBr3/EP) composite is firstly reported, which shows excellent gamma-rays shielding performance with high linear attenuation coefficient (3.082 cm−1) and high mass attenuation coefficient (2.047 cm2/g). Radiation shielding mechanism indicates that gamma-rays mainly interact with MAPbBr3 dispersed in epoxy. In other words, MAPbBr3 forms a radiation blocking path in epoxy, which significantly attenuates the intensity of incident gamma-rays. In addition, MA+ in MAPbBr3 crystal structure effectively blocks the penetrating behavior of secondary electrons. This work provides a novel strategy for the design and synthesis of high-performance radiation shielding packaging materials.