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1、半导体纳米线太阳能电池中的光传输研究摘要 随着我们对能源需求的不断增加，太阳能以其清洁性、安全性、资源充足性以及潜在的经济性越来越受到人们的重视，太阳能光伏器件的研究也成为了学术领域的研究热点。由于半导体纳米线具有优异的电子输运特性、卓越的化学稳定性以及优异的光学性能等，可以实现在纳米线太阳能电池等多种纳米电子器件的应用。因此，如何提高半导体纳米线太阳能电池的光电转换效率仍然是我们研究的热点和重点。本文简要介绍了纳米线的光学特性，太阳能电池的重要性能参数，紧接着描述了近些年半导体纳米线的研究进展。本文在前人的研究基础上，分析了不同几何结构的磷化铟和砷化铟纳米线太阳能电池的电磁性能。通过解决磷化
2、铟和砷化铟纳米线太阳能电池的特征值计算来确定波的传播以及源问题。给出了半导体纳米线太阳能电池的光散射、传播以及吸收的变化规律，说明了纳米线太阳能电池的吸收特性是由其结构的色散关系决定的。同时也说明了2D 波导模态有效性的分析方法是一种估算更高要求的 3D 分析结果的方法。关键词 纳米线 半导体 太阳能电池 光传输Optical transmission and Efficiency of semiconductor nanowires solar cellsAbstract: With the increasing demand for renewable energy, solar ener
3、gy has got continuous attention for the clean, safe, abundant features and the potential of the economy. The studying of solar photovoltaic devices has also become a focus of academic research in scientific community. As the semiconductor nanowires have excellent electron transport properties, excel
4、lent chemical stability and excellent optical properties, those properties can be used in a variety of nano-electronic devices and nanowire solar cells. Therefore, improving the photoelectric conversion efficiency of the semiconductor nanowires-based solar cells is the key issue of our work. This th
5、esis reviews the optical properties of the nanowires, and some important parameters of solar cells followed by a description of the recent research progress on semiconductor nanowires. In this work, based on the previous reported studies, the electromagnetic properties of different geometrical indiu
6、m phosphide and indium arsenide nanowire solar cells have been analyzed systematically. And the wave propagation is determined by solving the eigenvalue problem of the source of indium phosphide and indium arsenide nanowire solar cell. We give the semiconductor nanowires of solar cell light scatteri
7、ng and absorption variation of the propagation. The work illustrates that the absorption properties of the nanowire solar cell structure is determined by the dispersion relation. It also describes the 2D modal analysis method to estimate the effectiveness of the waveguide is a result of higher deman
8、d for 3D analysis method.Key words: Nanowires Semiconductor Solar cells Optical transmission目 录第一章: 绪论1.1 纳米线.11.1.1 纳米线的定义.11.1.2 纳米线的波导特性.11.2 太阳能电池.21.2.1 太阳能电池的定义及工作原理.21.2.2 表征太阳能电池的重要性能参数.31.3 半导体纳米线的研究进展.61.4本论文的主要内容.9第二章: 半导体纳米线太阳能电池的特性.112.1 半导体纳米线的光吸收特性.112.2 半导体纳米线的减反射特性.132.3半导体纳米线的光色散特性.142.4 半导体纳米线的电子输运特性.17第三章:半导体纳米线太阳能电池的色散以及波传输效率的理论分析.193.1 光场的计算.203.1.1 三维有限元的模拟.203.1.2 二维波导仿真.213.2 详细的平衡计算.243.3 讨论.253.4总结与展望.37致谢.39参考文献.40
