文献类型：期刊文献

英文题名：The effect of doping [Fe(CN)₆]^4- and [Ru(CN)₆]^4- on the photographic properties of the T-grain emulsion

作者：Dai, H; Liang, B; Zhuang, SY

机构：[1]E China Univ Sci & Technol, Res Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2002

卷号：50

期号：3

起止页码：141

外文期刊名：IMAGING SCIENCE JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000178667700003)】；

语种：英文

外文关键词：doping; shallow electron traps; transition metal complex; T-grain emulsion

摘要：The effects of two dopants, K-4[Fe(CN)(6)] and K-4[Ru(CN)(6)], on the photographic properties of the iodobromide T-grain emulsion were studied in this paper. It was found that both the doping amount and the location within the grain had significant effects on the photographic properties of the emulsion. The doping by either [Fe(CN)(6)](4-) or [Ru(CN)(6)](4-) could increase the photographic sensitivity of the silver halide emulsion, indicating that they could form shallow electron traps in the silver halide crystal, effectively protecting the electrons from immediate recombination with the holes. The extent of the improvement varied with different dopants and the doping conditions. The sensitivity increased more if the location of the dopant was near the grain surface for [Fe(CN)(6)](4-) and either near the surface or in the deep interior of the grain for [Ru(CN)(6)](4-). This study also indicated that iodide had an influence on the efficiency of the doping process. The chemical sensitization time could be prolonged and the formation of fog could be retarded by doping.