甲酸根离子均匀掺杂的卤化银中的光电子特性  

Photoelectron properties in silver halide with uniformly doped formate ions

作　　者：周娴[1] 杨少鹏[2] 傅广生[2] 

机构地区：[1]军械工程学院基础部理化教研室,河北石家庄050003 [2]河北大学物理科学与技术学院,河北保定071002

出　　处：《应用光学》2008年第5期670-674,共5页Journal of Applied Optics

基　　金：国家自然科学基金(10354001;60478033;10274017);河北自然科学基金(603138);河北博士基金(B2003119)

摘　　要：甲酸根离子(HCO2-)作为一种"空穴-电子转换剂"掺杂在卤化银中,可以提高潜影形成过程中光电子的利用率,俘获光生空穴,减少潜影形成过程中电子-空穴复合所造成的电子损失;同时还可以释放一个电子,提高感光效率。采用微波吸收介电谱检测技术,检测了不同浓度甲酸根离子均匀掺杂的立方体AgCl和AgBr乳剂在脉冲激光作用下所产生的光电子衰减信号。通过比较光电子的衰减时间和寿命,分析了甲酸根离子的空穴陷阱效应对立方体AgCl和AgBr乳剂中光电子衰减行为的影响,并得到了最佳均匀掺杂浓度(10-5mol/molAg)。As a hole-to-electron converter doped in silver halide emulsion, formate ion can enhance photoelectron yield in latent image formation, trap the photo-generated holes, eliminate or reduce the electron loss caused by electron-hole recombination in latent image formation process, and also release an extra electron to improve the photosensitivity. The decaying signal of photoelectrons generated by laser pulses in cubic AgCl and AgBr emulsions uniformly doped with different concentrations of formate ions was measured with the microwave absorption and dielectric spectrum detection technology. By the comparison of the decaying time and lifetime of photoelectrons, the influence of hole-trap effect of formate ions on photoelectron decay behavior in cubic AgCl and AgBr emulsions was analyzed, and it was founded that the optimal uniformly doping concentration was 10^-5mol/molAg.

关 键 词：空穴陷阱 甲酸根离子 光电子衰减信号 卤化银 

分 类 号：TN201[电子电信—物理电子学] TB84[一般工业技术—摄影技术]