State Key Laboratory of Crystal Materials, Center of Bio & Micro/Nano Functional Materials, Shandong University, 27 S. Shanda Road, Jinan 250100, China.
Nanoscale. 2012 Dec 7;4(23):7301-8. doi: 10.1039/c2nr32216a.
This review focuses on electron transfer at the interfaces between metal oxides and dye molecules within the context of the chemical nature of the anchoring functional groups, the structure of the dye molecules and the morphology of the metal oxides. In dye-sensitized metal oxides, the efficiency of interfacial charge separation and hence photon-to-current conversion may be sensitively manipulated by the interfacial bonding interactions whereby the dye molecules are adsorbed onto the oxide surface, as well as by the oxide surface morphologies. In these studies, it has been found that upon photoirradiation, the electron injection from the excited dye molecules into the conduction band of metal oxides and electron transport in the metal oxide are two of the most important steps. Therefore, a fundamental understanding of how the interfacial electron transfer dynamics is impacted by these structural parameters is critical for the design and optimization of dye-sensitized photocatalysis and photovoltaics.
这篇综述重点讨论了在染料分子与金属氧化物界面处的电子转移，内容涉及锚固官能团的化学性质、染料分子的结构以及金属氧化物的形态等方面。在染料敏化金属氧化物中，界面电荷分离的效率以及因此产生的光电流转换效率可以通过界面键合相互作用进行敏感调控，其中染料分子被吸附在氧化物表面上，同时还可以通过氧化物表面形态来调控。在这些研究中，已经发现，在光照射下，从激发态染料分子向金属氧化物导带中的电子注入以及在金属氧化物中的电子输运是两个最重要的步骤。因此，对于设计和优化染料敏化光催化和光伏技术而言，深入了解这些结构参数如何影响界面电子转移动力学至关重要。
