El-Bashar R, Hussein M, Hegazy Salem F, Badr Y, Farhat O Hameed Mohamed, Obayya S S A
Opt Express. 2021 Apr 26;29(9):13641-13656. doi: 10.1364/OE.417652.
Nanostructured semiconductor nanowires (NWs) present a smart solution for broadband absorption solar cells (SCs) with high efficiency and low-cost. In this paper, a novel design of quad crescent-shaped silicon NW SC is introduced and numerically studied. The suggested NW has quad crescent shapes which create a cavity between any adjacent NWs. Such a cavity will permit multiple light scattering with improved absorption. Additionally, new modes will be excited along the NWs, which are highly coupled with the incident light. Further, the surface reflection from the crescent NWs is decreased due to the reduced surface filling ratio. The finite difference time domain method is utilized to analyze the optical characteristics of the reported structure. The proposed NW offers short circuit current density (Jsc) of 27.8 mA/cm and ultimate efficiency (η) of 34% with an enhancement of 14% and volume reduction of 40% compared to the conventional NWs. The J and η are improved to 35.8 mA/cm and 43.7% by adding a Si substrate and back reflector to the suggested crescent NWs.
纳米结构半导体纳米线（NWs）为高效低成本的宽带吸收太阳能电池（SCs）提供了一种智能解决方案。本文介绍了一种新型的四边形月牙形硅纳米线太阳能电池的设计并进行了数值研究。所建议的纳米线具有四边形月牙形状，在任意相邻纳米线之间形成一个空腔。这样的空腔将允许多次光散射并改善吸收。此外，沿纳米线会激发新的模式，这些模式与入射光高度耦合。此外，由于表面填充率降低，月牙形纳米线的表面反射减少。利用时域有限差分法分析了所报道结构的光学特性。与传统纳米线相比，所提出的纳米线提供了27.8 mA/cm的短路电流密度（Jsc）和34%的极限效率（η），增强了14%，体积减少了40%。通过在所建议的月牙形纳米线上添加硅衬底和背反射器，Jsc和η分别提高到35.8 mA/cm和43.7%。
