作为第三代太阳能电池的有力候选者，量子点敏化太阳能电池（QDSSCs）具有重要的研究意义和应用前景。然而，目前QDSSCs的电池效率仍较低。本项目拟通过光阳极形貌调控和拓宽电池吸收光谱作为主要途径解决上述问题。利用高比表面积的三维织构化TiO2纳米管阵列作为光阳极，实验上构建FTO/TiO2/CdS/CdSe/PbS/ZnS结构的太阳能电池。在该结构中，高表面积的光阳极将提高量子点的有效负载量，外层PbS的敏化可使器件的吸收光谱拓宽至近红外区，对太阳光谱逐级的分段式吸收可提高光子的俘获率（TiO2(<380 nm)、CdS(<550 nm)、CdSe(<700 nm)、调节PbS的吸收边至近红外区）。通过量子点间II型异质结或pn结能带体系的构建，将实现光生载流子的快速分离与传输。可以预期，在该结构中有望实现高性能的QDSSCs。

As a promising candidate for third-generation solar cells, Quantum dot sensitized solar cells (QDSSCs) has important research significance and application prospects. However, the energy conversion efficiency of present QDSSCs is still low. This project will solve the problems by modifying and redesigning the morphology of photoanode and broadening the absorption spectrum of solar cells, while a 3D branched TiO2 nanotube with large surface to volume ratio will be used as photoanodes. A cell structure (FTO/TiO2/CdS/CdSe/PbS/ZnS) will be designed and constructed experimentally. In this structure, quantum dots adsorption capacity will be increased, owing to the large surface area in the photoanode. The absorption spectrum of the device will be widely distributed ( TiO2 (<380 nm), CdS (<550 nm), CdSe (<700 nm) ) and extended to the near-infrared region by introducing PbS quantum dots and the light-harvesting will also be increased. Meanwhile, the rapid separation and transportation will be achieved by the modulation of type II heterojunction or pn heterojunction energy band system in quantum dots. Therefore, a high performance QDSSCs may be obtained in the the structure proposed in this project.