以多晶碘化铅(PbI2)为原料,采用垂直布里奇曼法进行单晶生长,研究了PbI2单晶的生长特性,随后对单晶进行真空退火和气氛退火,并测试了生长态、真空退火态以及气氛退火态3种不同状态下晶体的光致发光谱(PL)、Ⅰ-V特性以及红外透过率.研究表明,在碘蒸汽中气氛退火后的碘化铅单晶质量较高,PL谱中激子(EX)峰的半峰宽有所下降,红外透过率从生长态的10％提升至30％左右,电阻率从生长态的3.3×109 Ω·cm提高至5.6×109 Ω·cm,可以有效提高晶体的探测效率.气氛退火有利于提高碘化铅的单晶质量,使其各项性能更加适用于室温核辐射探测器.
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