Self-assembled structure of cyanine dyes: J-aggregates characteristics on optical information storing microcrystals  

作　　者：JIANG Xiaoli LI Xiaowei LAI Weidong MENG Tao FENG Xiaomin ZHANG Jixian 

机构地区：[1]College of Physics Science & Technology, Hebei University, Baoding 071002, China College of Physics Science & Technology, Hebei University, Baoding 071002, China College of Physics Science & Technology, Hebei University, Baoding 071002, China College of Physics Science & Technology, Hebei University, Baoding 071002, China College of Physics Science & Technology, Hebei University, Baoding 071002, China College of Physics Science & Technology, Hebei University, Baoding 071002, China

出　　处：《Rare Metals》2006年第z1期158-162,共5页稀有金属（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China (No.10274017);the Natural Science Foundation of Hebei Province, China (No.103097, E2005000131).

摘　　要：Dye sensitization is a fundamental function for solar cell and silver halide (AgX) microcrystal to increase the optoelectronic conversion efficiency. In this paper, the spectral properties and self-assembled structure of three types of cyanine dyes, adsorbed both on (100) surface of 0.4 μm AgBr cubic crystal and (111) surface of 1.8 μm AgBr tabular crystal, were studied with combination of spectroscopy and atomic force microscopy (AFM) technique. Rectangular aggregation structure is formed on the crystal faces of (100) and (111) for both anionic and cationic dyes, while herringbone-stacking structure is formed by anionic-cationic dye, and a J-band spectrum is correspondingly detected. The photoelectron property of dye-sensitized samples was also investigated with microwave absorption and dielectric spectrum detection technology. After excited by a 355 nm fast-pulse laser, the photoelectron decay process of anionic-cationic dye sensitized sample is the fastest. This indicates that the affection of anionic-cationic dye aggregates to the photoelectron decay is the biggest, and the sensitization is more efficient.Dye sensitization is a fundamental function for solar cell and silver halide (AgX) microcrystal to increase the optoelectronic conversion efficiency. In this paper, the spectral properties and self-assembled structure of three types of cyanine dyes, adsorbed both on (100) surface of 0.4 μm AgBr cubic crystal and (111) surface of 1.8 μm AgBr tabular crystal, were studied with combination of spectroscopy and atomic force microscopy (AFM) technique. Rectangular aggregation structure is formed on the crystal faces of (100) and (111) for both anionic and cationic dyes, while herringbone-stacking structure is formed by anionic-cationic dye, and a J-band spectrum is correspondingly detected. The photoelectron property of dye-sensitized samples was also investigated with microwave absorption and dielectric spectrum detection technology. After excited by a 355 nm fast-pulse laser, the photoelectron decay process of anionic-cationic dye sensitized sample is the fastest. This indicates that the affection of anionic-cationic dye aggregates to the photoelectron decay is the biggest, and the sensitization is more efficient.

关 键 词：dye sensitization AGGREGATE optoelectronic conversion PHOTOELECTRON 

分 类 号：TG146.4[一般工业技术—材料科学与工程]