Effects of the micro-structure of arc-shaped groove, rectangular groove and semicircle-based rectangular groove on the reflectance of silicon solar cell

Effects of the micro-structure of arc-shaped groove, rectangular groove and semicircle-based rectangular groove on the reflectance of silicon solar cell
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弧形槽、矩形槽和半圆基矩形槽微结构对硅太阳能电池反射率的影响

DOI:
10.1016/j.solener.2017.10.032
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发表时间:
2017-12
期刊:
影响因子:
6.7
通讯作者:
Wenbo Bi
Wenbo Bi
中科院分区:
工程技术2区
文献类型:
--
作者:
Yuantai Wu;Lei Zhang;Peiqi Ge;Yufei Gao;Wenbo Bi

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硅太阳电池中的陷光结构可以产生光的多重反射,提高光的吸收。为了研究不同结构参数的微结构对300 nm ~ 1200 nm波长范围内光线反射率的影响,采用数值算法跟踪光线的传播路径,并利用菲涅耳方程,考虑波长和入射角确定每一条光线在每个反射点的反射率。计算了入射到硅光电池上的全部光线的最终反射率即加权反射率,分析了微结构的光捕获效率。对于矩形槽微结构,理论上加权反射率可以达到零,(定义为光线投射到硅太阳能电池上时的初始入射角)θ p≥ 60°,当矩形槽结构参数在特定范围内时,对所有波长光线的加权反射率均小于10%,更重要的是,当光线波长在400 nm-1200 nm范围内时,在细化的参数范围内,反射率可以小于8%。
Light trapping structure in silicon solar cells can produce multi-reflectance of light and improve light absorption. In order to study the effects of micro-structure with different structure parameters on the reflectance of rays for a wavelength range of 300 nm–1200 nm, a numerical algorithm is utilized to trace the propagation path of rays and Fresnel equations are used, and wavelength and incidence are considered to determine the reflectance of every single ray at each reflection point. The weighted reflectance defined as ultimate reflectance for the whole rays projects onto silicon cell is calculated and the light trapping efficiency of micro-structure is analyzed. For rectangular groove microstructure, the weighted reflectance can reach zero theoretically, When primary incidence (defined as the initial incidence of rays when projecting onto silicon solar cells) θ p≥ 60°, the weighted reflectance is less than 10% for all wavelength rays when rectangular groove structure parameters are in specific range, More intensively, when wavelength of rays are in the range of 400 nm–1200 nm, the reflectance can be smaller than 8% for a refined parameters range.
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