During the lead iodide (PbI_2) crystal growth by vertical bridgman method (VBM),how to resolve the problem of single crystal in rich of iodine atom is very important.

• 实验中发现:通过合理的选择坩埚在温场中的生长位置,可最大限度的减轻晶体富碘现象,分析了相关工艺,得出了最优工艺方案。