新概念的叠层结构染料敏化太阳电池（Tandem Dye Sensitized Solar Cells，简称TDSSCs）可通过扩展吸收光谱、提高开路电压达到提高电池光电转换效率的目的。其中经染料敏化的p型光阴极（以NiO材料为主）是该电池的核心组件。本项目借鉴准一维微纳结构有利于提高沿轴向光吸收同时提高沿径向载流子分离的特点，并利用喇叭、圆锥状微纳结构存在的可有效聚集电荷的静电尖端效应，将准一维微纳结构（纳米棒、纳米管、纳米喇叭、纳米圆锥等）引入TDSSCs的p型半导体薄膜光阴极，经对该结构表面进行粗糙化处理，采用 p型香豆素染料敏化后，探索准一维微纳结构在提高p型光阴极的比表面积、缓解NiO光阴极的自吸收中的作用规律。设计合成含有能量吸收天线和供电子基团的p型双染料分子敏化剂，制备p-DSSCs和TDSSCs器件，研究实现提高TDSSCs光电转换效率的新途径、新材料及新方法。

Tandem dye sensitized solar cells (TDSSCs) are the novel concept of dye sensitized solar cells with the potential high efficiency from widening their absorption spectra and heightening their open circuit voltages. An efficiently sensitized photocathode, such as sensitized p-type semiconductive NiO, is one of the most important components in the TDSSCs. In this project, a quasi 1-D micro/nano structured sensitized composite photocathode will be designed, fabricated and applied in the p-DSSCs and the TDSSCs. The composite p-type photocathode consists of the quasi 1-D micro/nano structures (such as nano rods, nano tubes, nano horns or nano cones of NiO et al) sensitized by the coumarin 343 (C343) p-type dye molecules. A D-PI-A structured p-type dye molecule will also be designed and synthesized subsequently. Generally, a quasi 1-D micro/nano structure can ensure a short carrier diffusion path length along its radial direction as well as a long optical absorption path length along its axial direction. On the other hand, the electrostatic effect of point will be expected in the horn and cone shaped NiO micro/nano structures to improve their electric charge collection. The specific surface area as well as the Uv-visible absorption of the p-type NiO photocathode will be compared when the roughening processes are carried out on the structures. A high specific surface area and a low self-absorption of the NiO photocathode will also be expected by introducing the quasi 1-D micro/nano structures into the p-DSSCs. The photovoltaic properties of the p-DSSCs and the TDSSCs (such as efficiency, FF, Voc, Jsc et al) with the optimum composite photocathode will be studied. The light harvest and the carrier transportation mechanisms in the composite photocathodes as well as in the TDSSCs will also be investigated.