物理学报Issue(24)：247801-1-247801-6,6.DOI:10.7498/aps.62.247801
非晶硅太阳电池宽光谱陷光结构的优化设计
Optimal design of light trapping structure for broadband absorption enhancement in amorphous silicon solar cell
摘要
Abstract
Light trapping is one of the key issues to improve the light absorption and increase the efficiency of thin film solar cell. In this paper, a novel combined light trapping structure consisting of back one-dimensional (1D) Ag nano-grating and front conformal antireflective coating is proposed for amorphous silicon (α-Si) thin film solar cell. By a numerical simulation based on the finite element method, the effect of the combination on the light absorption ofα-Si solar cell is investigated, and the Ag nano-grating parameters are optimized. The results show that the combined light trapping structure can enhance broadband absorption in thin-film solar cell. For theα-Si solar cell with the combined structure at P=600 nm, H=90 nm, and W=180 nm, the integrated absorption is enhanced by 103%under AM1.5 illumination at normal incidence in a wavelength range of 300-800 nm, and the photon absorption rate is increased by 300% in a long-wavelength range of 650-750 nm compared with the reference cell. We discuss the physical mechanism of absorption enhancement in different wavelength ranges from the electrical field amplitude distributions in the solar cells. In addition, the solar cell with the combined structure is much less sensitive to the angle of incident light.关键词
非晶硅太阳电池/陷光/银纳米光栅/数值模拟Key words
amorphous silicon solar cells/light-trapping/Ag nano-grating/numerical simulation引用本文复制引用
贾玉坤,杨仕娥,郭巧能,陈永生,郜小勇,谷锦华,卢景霄..非晶硅太阳电池宽光谱陷光结构的优化设计[J].物理学报,2013,(24):247801-1-247801-6,6.基金项目
国家重点基础研究发展计划(批准号:2011CB201606)和国家自然科学基金(批准号:11204276,51007082)资助的课题.@@@@Project supported by the National Basic Research Program of China (Grant No.2011CB201606) and the National Natural Science Foundation of China (Grant Nos.11204276,51007082) （批准号:2011CB201606）
