Characterization of Cl-doped two-dimensional (PEA)2PbBr4 perovskite single crystals for fast neutron and gamma ray detection

In this paper, a high-quality Cl-doped two-dimensional halide perovskite (PEA)(2)Pb(Br0.95Cl0.05)(4) crystal was prepared using a seed-induced volatile solvent method. On optimizing the Cl- doping concentration, we found that 5% Cl-doping results in (PEA)(2)PbBr4 with the highest optical and photon yield. Based on the Cl-doped (PEA)(2)PbBr4 single crystal, the response characterization of the (PEA)(2)Pb(Br0.95Cl0.05)(4) crystal in the mixed field of neutrons and gamma rays (n/gamma) has been verified. Using the time-of-flight method and the linear relationship between integral charge and neutron yield, it was proved that (PEA)(2)Pb(Br0.95Cl0.05)(4) crystal can be used for n/gamma screening. The time difference between the fast neutron released by a single nuclear reaction and the gamma photon arriving at the detector was 130 ns, and the arrival time of the gamma photon is earlier than that of the fast neutron. This work has a broad application prospect in the study of nuclear reaction kinetics, the monitoring of the neutron yield of fusion devices and the total energy released by nuclear reactions.