本项目首次采用金属硫族化合物Cu2ZnSn(S1-x,Sex)4 (CZTSSe)量子点-金属(Au、Pt 、Ag等)纳米颗粒的异质结构作为敏化剂、结合石墨烯-TiO2复合光阳极和钙钛矿型固态电解质, 设计并组装成新型全固态量子点敏化太阳能电池。该电池将CZTSSe和Au/Pt/Ag纳米颗粒的光电特性充分结合,应用该异质结构特有的局部表面等离子体共振效应、增加电池在可见光和近红外区域的光谱吸收强度，同时有效降低光生激子结合能，从而提高光生载流子产生的效率

In this research, we for the first time apply a novel kind of nano-heterostructure, i.e., metal sulfide Cu2ZnSn(S1-x,Sex)4 (CZTSSe) quantum dots with noble metal nanoparticles(Au,Pt,Ag, etc.) for fabricating the all-solid-state quandum-dots sensitized solar cells. Specifically, CZTSSe-Au/Pt/Ag nano composites functions as light absorber, in order to substitute the conventional dye; meanwhile, graphene-TiO2 film and solid-state perovskite electrolyte are as working electrode and hole-transport materials, respectively. This new type quantum-dots solar cells (QDSCs) will take advantage of the optoelectronic properties of both CZTSSe and Au/Pt/Ag nanoparticles, including the local surface plasmon resonance (LSPR) effects to increase the light absorption in visible-light and near-infrared region. In this case, the bonding energy of photogenerated.excitons can be efficiently reduced, and the light conversion efficiency of solar cells can be improved correspondingly.