文献类型：期刊文献

英文题名：Electron and hole conductivities of silver halide emulsions

作者：Jiao, JJ; Cao, LZ; Li, GY; Wang, H; Zhuang, SY

机构：[1]E China Univ Sci & Technol, Sch Chem & Pharm, Shanghai 200237, Peoples R China

年份：2005

卷号：53

期号：1

起止页码：46

外文期刊名：IMAGING SCIENCE JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000228607800006)】；

语种：英文

外文关键词：photographic emulsion; silver halide; electron conductivity; hole conductivity

摘要：The electrical properties of unexposed silver halide emulsion were studied by applying Wagner polarization. The experiments proved that a few free electrons and holes existed in the unexposed silver halide emulsion microcrystals. These factors are essential for the formation of fog centres, and there were some relationships between the fog centre formation and the electrical properties. The changes in electron conductivity indicated the intrinsic factors of fog formation in AgBr emulsions. The changes in hole conductivity revealed the capability of iodide ion, used as a crystal conditional agent, to trap holes. When shallow electron-trap dopant was added to the silver halide crystals, the electron conductivity of the emulsion increased, while the hole conductivity decreased.