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Thin film solar cells based on cavity enhanced grating structure

机译：基于腔增强光栅结构的薄膜太阳能电池

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摘要

A cavity enhanced one-dimensional grating structure is proposed to improve the light absorption within the a-Si thin film solar cell. Typically, dielectric or metal structure including gratings is added for the light absorption enhancement. Not only does the structure form the guided modes, and increase the surface area/surface angle, but also the thin film itself forms a cavity allowing light trapping for better absorption. However, the structure is optimized in these two mechanisms separately. In this paper, finite element method (FEM) was used to optimize thicknesses of two cavities and then combine them into a one -dimensional grating structure. Comparing to the flat thin film solar cell, we have get absorption enhancement factors of 1.12 and 1.51 normalized for the AM 1.5 spectrum for 300 nm to 950 nm by the two proposed structures.
机译：提出了一种腔增强的一维光栅结构，以改善a-Si薄膜太阳能电池内的光吸收。通常，添加包括光栅的电介质或金属结构以增强光吸收。该结构不仅形成了引导模式，并增加了表面积/表面角度，而且薄膜本身形成了一个空腔，可以捕获光以更好地吸收光。但是，分别在这两种机制中优化了结构。在本文中，有限元方法（FEM）被用来优化两个腔的厚度，然后将它们组合成一维光栅结构。与平面薄膜太阳能电池相比，我们通过两种拟议的结构获得了针对300 nm至950 nm AM 1.5光谱归一化的吸收增强因子1.12和1.51。

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  • 来源
  • 会议地点 San Francisco CA(US)
  • 作者

    Guangyao Su; Fangwang Gou; Chuanhong Liu; Siyao Guo; Zhaoyu Zhang;

  • 作者单位

    School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China;

    School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China;

    School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China;

    School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China;

    School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen, 518055, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solar cells; cavity; grating structure;

    机译：太阳能电池;腔光栅结构;

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