溴化银乳剂中Ag_2掺杂的位置效应研究  

Position Effect of Ag_2 Doped in Cubic Silver Bromide Emulsions

作　　者：智欣[1] 史瑶[1] 夏培杰[1] 

机构地区：[1]中国科学院理化技术研究所

出　　处：《感光科学与光化学》2005年第5期357-362,共6页Photographic Science and Photochemistry

基　　金：国家重点自然科学基金资助项目(20033010).

摘　　要：使用微机控制的双注仪,在晶体生长过程的不同时刻,加入一定浓度的二甲基胺硼烷(DMAB),制得了一系列Ag2处于不同掺杂位置的立方体溴化银微晶乳剂.对这些乳剂感光性能的研究表明:1)Ag2掺杂乳剂与未掺杂乳剂相比,感光度有显著提高;2)Ag2掺杂乳剂可同时与常规的硫加金化学增感和光谱增感进行协同增感;3)Ag2掺杂接近微晶表面时乳剂感光度的增幅最大;4)在本实验条件下,掺杂乳剂的灰雾均保持在较低的水平.In the emulsifying process of silver bromide microcrystals in the double-jet apparatus controlled by a microcomputer, a specific quantity of DMAB was added at different time when the crystal growth to obtain a series of cubic AgBr emulsions in which Ag2 were doped into different depths of AgBr microcrystals. The results from determination of photographic properties of these emulsions showed： 1 ） that the sensitivities of Ag2 doped emulsions, relative to that of the undoped emulsion as the controlled one, were remarkably increased; 2） that a significant cooperative sensitization of the internal doped silver dimmers with the surface sulfur-plus-gold and dye sensitizations was observed; 3） that the closer to the surface of grains the Ag2 doped in AgBr grains was, and the greater the sensitivities of the doped emulsions were; 4） that fog densities of all emulsions doped by Age, including thcse primitive, sensitized by sulfur-plus-gold and by green-sensitive dye, were kept in a reasonably low level.

关 键 词：空穴-电子转换 她掺杂 S+Au增感 染料增感 协同增感 

分 类 号：TQ571[化学工程—精细化工]