State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, China.
Nanoscale Res Lett. 2015 Dec;10(1):436. doi: 10.1186/s11671-015-1110-1. Epub 2015 Nov 6.
In this paper, we propose a plasmon-enhanced solar cell structure based on a GaAs nanowire array decorated with metal nanoparticles. The results show that by engineering the metallic nanoparticles, localized surface plasmon could be excited, which can concentrate the incident light and propagate the energy to nanowires. The surface plasmon can dramatically enhance the absorbance of near-bandgap light, and the enhancement is influenced by the size and material of nanoparticles. By optimizing the particle parameters, a large absorbance enhancement of 50 % at 760 nm and a high conversion efficiency of 14.5 % can be obtained at a low diameter and period ratio (D/P ratio) of 0.3. The structure is promising for low-cost high-performance nanoscale solar cells.
本文提出了一种基于 GaAs 纳米线阵列的等离子体增强型太阳能电池结构，该结构由金属纳米粒子修饰。结果表明，通过对金属纳米粒子进行工程设计，可以激发出局域表面等离激元，从而将入射光集中并将能量传播到纳米线中。表面等离激元可以显著增强近带隙光的吸收，增强效果受纳米粒子的尺寸和材料的影响。通过优化粒子参数，在低直径与周期比（D/P 比）为 0.3 的情况下，可以在 760nm 处获得 50%的大吸收率增强和 14.5%的高转换效率。该结构有望用于低成本高性能的纳米级太阳能电池。
