论文部分内容阅读
报道了Ce3+和Ce4+两种金属离子桥联苝四羧酸在二氧化钛纳米晶电极上自组装膜的制备,并利用紫外可见光谱、红外光谱、光电子能谱等手段对自组装膜进行了表征. 通过同步辐射光电子能谱确定了自组装膜的HOMO能级. 基于自组装膜敏化二氧化钛纳米晶电极的薄层三明治型太阳能电池具有较好的光电转化性质. 在480 nm, 苝四羧酸敏化二氧化钛电极产生了26.9%的入射单色光子-电子转化效率(IPCE), 而由Ce4+离子或Ce3+离子桥联所形成的自组装膜分别产生了55.8%和39.1%的IPCE. 金属离子桥联苝四羧酸自组装膜相当于一种配合物, 其HOMO能级比苝四羧酸自组装膜的高, 这是形成铈离子桥联苝四羧酸后IPCE提高的一个主要原因.
The preparation of self-assembled monolayers of Ce3 + and Ce4 + bridged perylene tetracarboxylic acids on titania nanocrystalline electrodes was reported. The self-assembled monolayers were characterized by UV-visible spectroscopy, infrared spectroscopy and photoelectron spectroscopy Synchrotron radiation photoelectron spectroscopy (XPS) was used to determine the HOMO energy level of self-assembled monolayers.A thin layer sandwich solar cell based on self-assembled monolayers of sensitized TiO 2 nanocrystal electrodes has good photoelectric conversion properties.At 480 nm, sensitization of perylene tetracarboxylic acid The TiO 2 electrode produced 26.9% incident monochromatic photon-electron conversion efficiency (IPCE), while the self-assembled films formed by Ce 4+ ion or Ce 3+ ion bridge produced 55.8% and 39.1% IPCE, respectively. Metal ions bridged perylene The tetracarboxylic acid self-assembled monolayer is equivalent to a complex with a higher HOMO energy level than the perylene tetracarboxylic acid self-assembled monolayer, which is one of the main reasons for the IPCE increase after the formation of cerium ion-bridged perylenetetracarboxylic acid.