Superiority of random inverted nanopyramid as efficient light trapping structure in ultrathin flexible c-Si solar cell
Superiority of random inverted nanopyramid as efficient light trapping structure in ultrathin flexible c-Si solar cell
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DOI：
10.1016/j.renene.2018.10.063
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发表时间：
2019-04-01
期刊：
影响因子：
8.7
通讯作者：
Wei, Qingzhu
中科院分区：
文献类型：
--
作者：
Tang, Quntao;Shen, Honglie;Wei, Qingzhu
在这项工作中，通过简单且具有成本效益的湿化学方法在超薄c-Si上制造了随机倒置纳米锥（INPs）作为光捕获结构，然后结合实验和模拟对INPs的光捕获特性进行了系统研究。在综合考虑厚度损失和陷光性能的基础上，将随机INPs应用于45 μ m的单晶硅太阳能电池上，（36.6 mA/cm（2））和能量转换效率（17.0%），分别比微金字塔织构高0.3mA/cm ~ 2和0.13%;电学模拟结果也表明，与传统的微锥结构相比，INPs在较薄的c-Si上的优势更加明显。最后，通过电学模拟，通过控制前后表面复合速度，INPs纹理45 μ m c-Si太阳能电池有望在效率上有很大的提升空间。所有的研究结果不仅提供了额外的洞察光捕获机制的随机INPs，但也提供了可控的和高效的宽带光收集器的下一代成本效益的灵活的photopolics。(C)2018爱思唯尔有限公司版权所有。
In this work, random inverted nanopyramids (INPs) are fabricated as light trapping structures on ultrathin c-Si through a simple and cost-effective wet chemical method, followed by a systematic investigation of the photo-capturing properties of INPs combining experiments and simulations. In comprehensive consideration of thickness loss and light trapping performance, random INPs are applied onto 45 mu m ultrathin c-Si solar cell and a high short-current density (Jsc) (36.6 mA/cm(2)) and energy-conversion efficiency (17.0%) are achieved, which are 0.3 mA/cm(2) and 0.13% respectively higher than that in micro pyramid textured one, and our electrical simulation also demonstrates that the advantages of INPs are more obvious on thinner c-Si compared with conventional micro pyramids. Finally, through electrical simulation, INPs textured 45 mu m c-Si solar cell is expected to have a large improvement room for efficiency by controlling the front and rear surface recombination velocity. All the findings not only offer additional insight into the light-trapping mechanism in the random INPs but also provide controllable and efficient broadband light harvesters for next-generation cost effective flexible photovoltaics. (C) 2018 Elsevier Ltd. All rights reserved.