配体对功能自组装薄膜的光致电子转移特性的影响(英文)  

Effects of Connecting Ligands on Photoinduced Electron Transfer Properties of Functionalized Self-assembled Solid Films

作　　者：韦天新[1] 史环环[1] 黄春辉[2] 于小峰[2] 黄慧忠[2] 吴念祖[2] 

机构地区：[1]北京理工大学化学物理研究所,北京100081 [2]北京大学稀土材料化学及应用国家重点实验室,北京100087

出　　处：《无机化学学报》2006年第6期1077-1084,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.20023005,20471009,20573010);教育部留学回国人员科研启动基金;北京理工大学优秀青年教师资助计划(No.000Y07-30)。

摘　　要：A strategy for fabricating the functionalized self-assembled films is proposed. Through the comparison of three self-assembled films of 3,4,9,10-perylene tetracarboxylic acid (PTA) with different connecting ligands, i.e. oxalic acid (Ox), succinic acid (Su), or terephthalic acid (Tp), it was found that the optimal system was composed of oxalic acid, Ce4+ and 3,4,9,10-perylene tetracarboxylic acid,which was much better than simple covalent connecting PTA films and the connecting ligands played an important role for the properties of self-assembled (SA) films. All these films were characterized by contact angle, UV spectra, cyclic voltammetry and XPS. The photocurrent generation of the best system were 5 706, 7 345 nA·cm-2, respectively, being among the highest values of dye-sensitized indium tin oxide (ITO) systems. The effects of light intensity, bias voltage, and electron donor on photoinduced electron transfer properties were also studied. The possible mechanism of electron transfer is proposed.A strategy for fabricating the functionalized self-assembled films is proposed. Through the comparison of three self-assembled films of 3,4,9,10-perylene tetracarboxylic acid （PTA） with different connecting ligands, i.e. oxalic acid （Ox）, succinic acid （Su）, or terephthalic acid （Tp）, it was found that the optimal system was composed of oxalic acid, Ce^4＋ and 3,4,9,10-perylene tetracarboxylic acid,which was much better than simple covalent connecting PTA films and the connecting ligands played an important role for the properties of self-assembled （SA） films. All these films were characterized by contact angle, UV spectra, cyclic vohammetry and XPS. The photocurrent generation of the best system were 5 706, 7 345 nA·cm^-2, respectively, being among the highest values of dye-sensitized indium tin oxide （ITO） systems. The effects of light intensity, bias voltage, and electron donor on photoinduced electron transfer properties were also studied. The possible mechanism of electron transfer is proposed.

关 键 词：薄膜 表面和界面 光电转换 光伏 

分 类 号：O641.4[理学—物理化学]