碳纳米纤维"骨架"支撑的三维异质结硅太阳电池：设计和制备

项目名称： 碳纳米纤维"骨架"支撑的三维异质结硅太阳电池：设计和制备

项目编号： No.11304132

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 栗军帅

作者单位： 兰州大学

项目金额： 30万元

中文摘要： 纳米结构"骨架"支撑的三维薄膜太阳电池，除了具有类似于"径向pn结纳米线阵列"高效的光管理和载流子收集性能外，其材料的使用量更低且制备工艺与目前商用薄膜电池的相兼容。因此，具有更高的潜在性价比和商业化价值。然而，由于目前相关研究尚处于肇始阶段，缺乏结合光、电学过程的理论研究和优化的高效器件的制备工作。本项目将在我们对相关器件中光、电学过程理论研究的基础上，以碳纳米纤维阵列为"骨架"，制备结构和电、光学参数优化的三维异质结非晶硅薄膜太阳电池（该结构亦可推广至晶化硅等薄膜电池）。与目前报道的"骨架"材料（如纳米玻璃锥、氧化锌纳米棒、纳米银针等）相比，碳纤维兼具良好的导电性、高的强度和韧性、环境友好、原材料丰富等优点。另外，利用氢化非晶硅碳作窗口层可以提高电池的开路电压并减少对入射光的无效吸收。因此，本研究有望在高性价比三维硅薄膜电池的实验实现上有所突破，为其产业化提供有益的探索。

中文关键词： 半导体纳米结构；三维薄膜太阳电池；光管理；碳纳米结构；直立石墨烯

英文摘要： 3D thin film solar cells employing nanostructures as the supporting skeleton exhibit excellent light management and effective carrier collection like in radial pn junction nanowire arrays. Moreover, they have advantages including low materials usage, high compatibility with the present manufacturing of commercialized thin film solar cells, as compared to nanowire array-based ones. Thus 3D thin film solar cells are expected to have higher ratios of performance to cost and commercialization values. However, as the related research is still at the starting stage, it is lack of reports on preparation of high performance devices especially based on the theoretical understanding and optimization of the optical and electrical processes in the structures. In this project, we are going to systematically investigate and optimize the related optical and electrical processes, and then fabricate 3D heterojunction amorphous silicon thin film solar cells on carbon nanofiber arrays. Relative to the reported skeletons such as glass nanocones, ZnO nanorods and silver needles, carbon nanofibers combine the merits of good conductivity, high strength and tenacity, environmental friendliness, and abundant raw materials etc. Hydrogenated amorphous silicon carbide employed as the window layer has a wide bandgap,thus benefiting for impr

英文关键词： Semiconductor nanostructures；3D film solar cells；light management；carbon nanostructures；vertically aligned graphene