Mathieu-Pennober Tiphaine, Foldyna Martin, Zhang Shan-Ting, Julien François H, Schneider Nathanaelle, Tchernycheva Maria
Centre de Nanosciences et de Nanotechnologies (C2N), UMR 9001 CNRS, Université Paris Saclay, 10 Boulevard Thomas Gobert, 91120, Palaiseau, France.
Nanotechnology. 2020 Oct 23;31(43):435408. doi: 10.1088/1361-6528/aba4ce. Epub 2020 Jul 10.
Optoelectronic devices based on high aspect ratio nanowires bring new challenges for transparent electrodes, which can be well addressed by using hybrid structures. Here we demonstrate that a composite contact to radial junction nanowire solar cells made of a thin indium-tin oxide (ITO) layer and silver nanowires greatly improves the collection of charge carriers as compared to a single thick ITO layer by reducing the series resistance losses while improving the transparency. The optimization is performed on p-i-n solar cells comprising of dense non-vertical nanowires with a p-doped c-Si core and an ultra-thin a-Si:H absorption layer grown by plasma-enhanced chemical vapor deposition on glass substrates. The optimal hybrid contact developed in this work is demonstrated to increase the solar cell conversion efficiency from 4.3% to 6.6%.
基于高深宽比纳米线的光电器件给透明电极带来了新的挑战，而采用混合结构可以很好地解决这些挑战。在此，我们证明，与单一厚铟锡氧化物（ITO）层相比，由薄ITO层和银纳米线制成的径向结纳米线太阳能电池的复合接触通过降低串联电阻损耗并提高透明度，极大地改善了电荷载流子的收集。优化是在由具有p型掺杂c-Si芯的致密非垂直纳米线和通过等离子体增强化学气相沉积在玻璃基板上生长的超薄a-Si:H吸收层组成的p-i-n太阳能电池上进行的。在这项工作中开发的最佳混合接触被证明可将太阳能电池的转换效率从4.3%提高到6.6%。
