光学学报, 2014, 34 (s2): s222004, 网络出版: 2014-12-04   

锥状GaAs纳米线阵列太阳能电池的光伏特性研究

Research on the Photovoltaic Performance of the Tapered GaAs Nanowire Array Solar Cell
作者单位
北京邮电大学信息光子学与光通信国家重点实验室, 北京 100086
摘要
通过有限时域差分和有限元方法,对锥状GaAs纳米线阵列太阳能电池的光伏特性进行了仿真。利用有限时域差分仿真研究了形貌和分布特性对GaAs纳米线光谱吸收效率的影响。结果表明与柱状纳米线相比,锥状纳米线具有更高的吸收率和更低的透射反射率。且在某特定坡度的情况下,纳米线的吸收效果最佳。纳米线的吸收效率随直径/周期比增加呈现出先上升后下降的趋势。将有限时域差分仿真获得的光子吸收率分布数据,导入有限元仿真器进行了纳米线太阳能电池的光伏特性仿真,在最佳形貌和直径/周期比的情况下,太阳能电池的光电转换效率可以达到13.8%。
Abstract
The photovoltaic performance of the tapered GaAs nanowire array solar cell is simulated by finite-different time-domain and finite element methods. The effect of the morphology and distribution characteristics of GaAs nanowires on their optical absorption efficiency are studied by finite-different time-domain method. The results show that the tapered nanowire has a higher absorptivity and lower reflectivity and transimissivity compared with its column counterpart. In addition, the nanowire exhibits a best absorption performance at a certain angle. The absorption efficiency of nanowire array first increases and then decreases with the increase of the diameter/period ratio. The photogeneration profiles of the FDTD simulations are coupled into a finite solver by which the photovoltaic performance of the solar cell is simulated. The efficiency of the solar cell can reach 13.8% with a most optimized morphology and diameter/period ratio.

王思佳, 张辰, 颜鑫, 张霞, 任晓敏. 锥状GaAs纳米线阵列太阳能电池的光伏特性研究[J]. 光学学报, 2014, 34(s2): s222004. Wang Sijia, Zhang Chen, Yan Xin, Zhang Xia, Ren Xiaomin. Research on the Photovoltaic Performance of the Tapered GaAs Nanowire Array Solar Cell[J]. Acta Optica Sinica, 2014, 34(s2): s222004.

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