单注法制备了四个不同掺杂铈量的碘溴化银乳剂和对照乳剂,使用微波光导法测定了这五个乳刺微晶体的光电导及光电导衰减过程,进而确定了光电子寿命。结果表明:随着铈(Ce~(3+))掺杂量由0(即对照乳剂)增加到3.76×10~(-2)mol Ce~(3+)/mol AgBr,乳剂微晶体的光电子寿命成倍减小。由此推论:在乳剂微晶中,Ce~(3+)起到光电子陷阱的作用。 Single injection method was used to prepare silver iodobromide emulsions with different amounts of doped cerium and the control emulsions. The photoconductivity and photoconductive decay of these five lancet microcrystals were determined by microwave photoconductive method, and the photoelectron lifetime . The results show that with the increase of cerium (Ce ~ (3 +)) doping amount from 0 (control emulsion) to 3.76 × 10 -2 mol Ce ~ (3 +) / mol AgBr, Photoelectron lifetime doubled. It is deduced that Ce ~ (3+) plays a role of photoelectron trap in the emulsion crystallites.