【作者】 张继县； 李晓苇； 赖伟东； 张荣香； 田晓东；

【Author】 ZHANG Jixian LI Xiaowei LAI Weidong ZHANG RongxiangTIAN Xiaodong(College of Physics Sciences & Technology, Hebei University, Baoding 071002, China)

【机构】 河北大学物理科学与技术学院；

【摘要】 应用微波吸收介电谱相敏检测技术研究染料增感不同时间的氯化银光电子衰减时间分辨谱。结果表明:当染料浓度较低时(0.02ml/40g乳剂),自由光电子的衰减随增感时间的增长而明显地变快:增感时间较短(5min)时,自由光电子的寿命比纯AgCl的长,衰减慢;增感时间较长时(>30min),自由光电子寿命比纯AgCl短,衰减快。当染料浓度较高时(6.00ml/40g乳剂),自由光电子的衰减随增感时间的增长无明显变化,其衰减均比纯AgCl快。对光电子衰减规律的变化与聚集体的形成和光谱增感机理的关系进行了讨论。更多还原

【Abstract】 The time-resolved spectra of photoelectron decay are measured by microwave absorption and dielectric spectrum detection technology. The results show that when the concentration of dye is small (0.02 ml/40 g AgCl emulsion), the photoelectron decay becomes fast obviously with the increasing sensitization time. When the sensitization time is less than 30 min, the photoelectron decay is slower than that of pure AgCl, but when the sensitization time is more than 50 min, the photoelectron decay is faster than that of pure AgCl; When the concentration of dye is big (6ml dye/40g AgCl emulsion), the influence of sensitization time on photoelectron decay of AgCl is not obvious. The relationship of the change of photoelectron decay and the form of J-aggregate is discussed.更多还原