Abstract Crystalline silicon bifacial photovoltaic modules (BFPVs), which simultaneously harvest the front- and rear-incident light, are suitable for building-integrated energy harvesting system due to their high power output and transparency. However, the lack of a rear reflector in semi-transparent BFPVs lowers their efficiency. In this study, we proposed a selective reflector (SR) with a dielectric/metal/dielectric structure to increase the power output of BFPVs and ensure a clear view through the BFPV windows. The SRs exhibit a high transmittance in the visible-light region and a high reflectance in the near-infrared (NIR)-light region. By recycling unabsorbed photons by SR, the power output of the SR-incorporated BFPVs is 13.2% higher than that of the BFPVs with bare glass. Moreover, the SR prevents the heating of the interior of buildings by reflecting the NIR light. Hence, the SR can contribute to energy efficiency of buildings.

中文翻译：

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用于提高建筑集成双面 c-Si 光伏模块的能源效率的电介质/金属/电介质选择性反射器

摘要 晶体硅双面光伏组件（BFPVs）可同时收集前后入射光，由于其高功率输出和透明性，适用于建筑集成能量收集系统。然而，半透明 BFPV 缺少后反射器会降低其效率。在这项研究中，我们提出了一种具有电介质/金属/电介质结构的选择性反射器 (SR)，以增加 BFPV 的功率输出并确保通过 BFPV 窗口获得清晰的视野。SR 在可见光区域表现出高透射率，在近红外 (NIR) 光区域表现出高反射率。通过 SR 回收未吸收的光子，掺入 SR 的 BFPV 的功率输出比使用裸玻璃的 BFPV 高 13.2%。而且，SR 通过反射 NIR 光来防止建筑物内部升温。因此，SR 可以为建筑物的能源效率做出贡献。