Growth of lead iodide single crystal by vertical bridgman method

Lead Iodide(PbI_2) crystal is a promising material for room temperature nuclear radiation detectors,characterized by its large average atomic number and wide band gap.In this paper,the Lead Iodide(PbI_2) poly-crystal has been successfully synthesized directly from Pb and I_2 by two-zone vapor-transporting method(TVM).PbI_2 single crystal with three different colors were prepared using Vertical Bridgman Method(VBM).By adjusting the position of ampoule in a suitable temperature gradient to prevent iodine atoms from the crystal inside,the yellow PbI_2 single crystal with good quality can be prepared.