基于FDFD方法的有机太阳能电池光电特性研究

发布时间：2018-10-26 07:53

【摘要】：有机太阳能电池具有重量轻、成本低、耗能低、易于制造、延展性好、易于与其他设备兼容等优点,已成为新型能源领域的研究热点。然而,有机太阳能电池低的光电转化效率一直是有机太阳能电池研究的瓶颈,因此,提高有机太阳能电池的光电转化效率仍是当今研究的热点。本论文就是在有机太阳能电池中加入金属纳米结构,利用表面等离子体共振效应提高光吸收,从而提高光电转化效率。同时,本论文还研究了斜入射条件下,有机太阳能电池的光电特性。之后,在此基础上研究了小周期有机太阳能电池的光电特性。本文主要运用频域有限差分法(FDFD)对太阳能电池中的方程进行求解,从而对其光电特性进行研究和分析。本文的主要研究工作如下:1.简要阐述有机太阳能电池的基本理论,包括有机太阳能电池的发展历程、基本结构、工作原理以及衡量工作性能的特性参数。在传统有机太阳能电池的基础上,引入了表面等离子体纳米结构,介绍了表面等离子体共振效应对提高有机太阳能电池光电转化效率的原理。2.介绍了频域有限差分方法的基本原理,并与其他算法进行对比。在处理频域问题、斜入射问题以及周期结构上,频域有限差分方法存在着较大的优势。将FDFD方法引入有机太阳能电池的研究中,用FDFD方法对有机太阳能电池中的麦克斯韦方程组、泊松方程、漂移-扩散方程进行处理。3.在传统有机太阳能电池的基础上,引入了 Ag纳米光栅结构,利用表面等离子体效应来增强有机太阳能电池的光吸收,从而提高光电转化效率。同时,还研究了在斜入射状况下,有机太阳能电池的光电特性。4.缩小含Ag光栅的有机太阳能电池的周期,研究小周期有机太阳能电池的光吸收,光电转化效率;改变光栅的间隔宽度,研究光栅间隔宽度对有机太阳能电池光电特性的影响。
[Abstract]:Organic solar cells have many advantages, such as light weight, low cost, low energy consumption, easy manufacture, good ductility and compatibility with other equipments. However, the low photoconversion efficiency of organic solar cells has been the bottleneck of the research of organic solar cells. Therefore, improving the photoelectric conversion efficiency of organic solar cells is still a hot topic. In this paper, metal nanostructures are added to the organic solar cells to improve the optical absorption by using the surface plasmon resonance (SPR) effect, thus improving the photoelectric conversion efficiency. At the same time, the photoelectric characteristics of organic solar cells under oblique incidence are studied. Then, the photoelectric characteristics of small period organic solar cells are studied. In this paper, the finite difference method in frequency domain (FDFD) is used to solve the equations of solar cells, and the photoelectric characteristics of solar cells are studied and analyzed. The main work of this paper is as follows: 1. This paper briefly describes the basic theory of organic solar cells, including the development of organic solar cells, the basic structure, working principle and the characteristic parameters to measure the performance of the organic solar cells. Based on the traditional organic solar cells, the surface plasma nanostructure is introduced, and the principle of surface plasmon resonance effect on improving the photoconversion efficiency of organic solar cells is introduced. 2. The basic principle of frequency domain finite difference method is introduced and compared with other algorithms. In frequency domain problem, oblique incidence problem and periodic structure, the finite difference method in frequency domain has great advantages. The FDFD method is introduced into the study of organic solar cells, and the Maxwell equations, Poisson equations and drift-diffusion equations in organic solar cells are treated by FDFD method. Based on the traditional organic solar cells, the Ag nano-grating structure is introduced, and the photoabsorption of the organic solar cells is enhanced by the surface plasma effect, thus improving the photoelectric conversion efficiency. At the same time, the photoelectric characteristics of organic solar cells under oblique incidence are studied. 4. 4. Reduce the period of organic solar cells with Ag grating, study the light absorption and photoelectric conversion efficiency of small period organic solar cells, and study the influence of grating spacing width on the photovoltaic characteristics of organic solar cells by changing the grating spacing width.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM914.4

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