In this paper, a simple method to grow silver nanoparticles (Ag-NPs) onto a thin dielectric layer on silicon substrates is presented by using a wet-based chemical technique. The mechanism of Ag-NPs in-situ growth on dielectric films, and the influence of the dielectric materials, the thickness of dielectric film and the reaction time on the morphologies of Ag-NPs were investigated. Moreover, the Ag-NPs have been integrated into the rear dielectric layers (Al₂O₃/SiN_x) of bifacial monocrystalline silicon passivated-emitter–rear-contact (mono-Si PERC) solar cells. The cells show not only the acceptable electrical performance, i.e. the average efficiency gain ~0.04% and the highest efficiency of 22.71%, but also the tunable rear colors. The research in this paper provides a feasible approach for tunning the rear color of the solar cells, which has potential to be applied in building integrated photovoltaics (BIPV) in terms of aesthetical aspects.

在本文中，提出了一种使用湿法化学技术在硅衬底上的薄介电层上生长银纳米粒子 (Ag-NPs) 的简单方法。研究了Ag-NPs在介电薄膜上原位生长的机理，以及介电材料、介电薄膜厚度和反应时间对Ag-NPs形貌的影响。此外，Ag-NPs 已集成到后介电层 (Al ₂ O ₃ /SiN _x) 的双面单晶硅钝化发射极后接触（单硅 PERC）太阳能电池。电池不仅显示出可接受的电气性能，即平均效率增益 ~0.04% 和最高效率 22.71%，而且还显示可调后部颜色。本文的研究为调整太阳能电池背面颜色提供了一种可行的方法，在美学方面具有应用于建筑集成光伏（BIPV）的潜力。