High-efficiency and ultrathin crystalline silicon solar cells (SCs) with a frequency upconversion (UC) layer and an array of silver nanohemispheres were presented. The light-trapping performances of SCs embedded with different volume ratios and radii of Ag nanohemispheres were systematically studied by finite-element analysis. The simulation results show that the short-circuit current density of the SCs and the light-field intensity in the UC layer can be significantly improved by adjusting the structural parameters of Ag nanohemispheres. The short-circuit current density of the structured SCs have been improved by 16.48% and the light-field intensity in the UC layer has been increased by 2.65 times compared to that of planar SCs. Additionally, the UC effects on the power conversion efficiency of the SCs were also investigated. The presented model will serve as the basis for further preparations of high-efficiency ultrathin crystalline SCs.

中文翻译：

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使用银半球纳米粒子增强具有上转换层的超薄晶体硅太阳能电池的光吸收

展示了具有上转换（UC）层和银纳米半球阵列的高效超薄晶体硅太阳能电池（SC）。通过有限元分析系统研究了嵌入不同体积比和半径的Ag纳米半球的SCs的光捕获性能。仿真结果表明，通过调整Ag纳米半球的结构参数，可以显着提高SCs的短路电流密度和UC层的光场强度。与平面SCs相比，结构SCs的短路电流密度提高了16.48%，UC层的光场强度提高了2.65倍。此外，还研究了 UC 对 SC 功率转换效率的影响。