Super-sensitization mechanism of T-grain AgBrI emulsion sensitized by an anionic-cationic cyanine dye

作者：Yang Shaopeng^*; Li Chunlei; Fan Shanshan; Lu Sukui; Yang Jingfa; Zhang Wei; Li Xiaowei; Fu Guangsheng

来源：Materials Letters, 2008, 62(15): 2434-2437.

DOI：10.1016/j.matlet.2007.12.014

• anionic-cationic cyanine dyes
• kinetics
• electron transfer
• J-aggregates
• transport mechanism

The transient time-resolved fluorescence decay spectrum of J-aggregates of an anionic-cationic cyanine dye adsorbed on tabular AgBrI nanocrystals has been investigated using femtosecond fluorescence up-conversion technology. The. kinetics of the super-sensitization of the anionic-cationic cyanine dye is discussed in detail. The J-aggregates of the anionic-cationic cyanine dye have two excited states. Thus, more electrons are transferred from the excited states of the anionic-cationic cyanine dye to the conduction band of T-grain AgBrI. It is shown that the cations and anions in the anionic-cationic cyanine dye give rise to reciprocal super-sensitization effects in the red and green regions respectively.

• 出版日期2008-5-31
• 单位河北大学