Abstract：
Light management (LM) is the key to the encapsulation of high-performance silicon (Si) photovoltaic devices (PVs). In this work, simulation analyses provide meaningful insights into optical losses and guide the improvement of the PV performance of the encapsulated silicon solar cells (Encap-Si SCs). An antireflective layer, textured polydimethylsiloxane (PDMS), is designed to reduce reflection losses, especially at a lower illumination intensity, thereby achieving an improvement of 10.89% in the short-current density (JSC) and hence 12.67% in the power conversion efficiency (PCE) when illuminated at an incident angle of 60°. Subsequently, a luminescence down-shifting material, lead-free Cs2AgxNa1-xBiyIn1-yCl6 (CANBIC) double perovskite phosphor, is incorporated into the PDMS film to further enhance the energy yield in the ultraviolet (UV) region. The textured PDMS film with an optimized CANBIC content ultimately achieves a significant improvement in PCE from 21.770 to 23.136%. This enhancement is attributed to the increase in JSC by 2.381 mA/cm2 due to the reduced reflection losses (by antireflective PDMS) and down-converted UV energy (by CANBIC), providing a remarkable advance in LM toward highly efficient encapsulated PVs.
摘要：
光管理(LM)是封装高性能硅(Si)光伏器件(PV)的关键。在这项工作中,模拟分析提供了有意义的见解，光损耗和指导光伏性能的提高封装硅太阳能电池（Encap-SiSC）。抗反射层，纹理聚二甲基硅氧烷（PDMS），旨在减少反射损失，尤其是在较低的照明强度下，由此,以60°的入射角照射时,短电流密度(JSC)提高10.89%,功率转换效率(PCE)提高12.67%。随后，发光下移材料，无铅Cs2AgxNa1-xBiyIn1-yCl6(CANBIC)双钙钛矿荧光粉，结合到PDMS膜中以进一步提高紫外(UV)区域的能量产量。具有优化CANBIC含量的纹理化PDMS膜最终实现PCE从21.770到23.136%的显著改善。这种增强归因于JSC增加了2.381mA/cm2，这是由于减少了反射损耗（通过抗反射PDMS）和下转换的UV能量（通过CANBIC）。为LM向高效包封的PV提供了显著的进步。
