Semi-transparent solar cells can be used for spectral beam splitting (SBS) in which short-wavelength photons are converted to electricity and long-wavelength photons are transmitted to thermal absorbers. However, these thermal absorbers can only produce low-grade thermal energy because the semi-transparent solar cell cannot concentrate long-wavelength photons. In this study, based on the idea of regulating the radiation field to match the energy conversion on-demand, the strategy to use a single piece of photovoltaic (PV) to regulate the photon capture of the full solar spectrum for realizing the co-generation of electricity and high-grade thermal energy is proposed. A semi-transparent solar cell with a serrated groove structure at the bottom is designed and fabricated. The cell can convert 400–800 nm wavelength photons to electricity, and focus 800–2500 nm wavelength photons to a small spot to produce high-temperature thermal energy. A novel α-Si thin-film semi-transparent solar cell-based SBS hybrid photovoltaic/concentrated solar thermal system is established. The feasibility of the system is validated through indoor and outdoor experiments. The utilization efficiency of the full-spectrum solar energy can reach 77%. The high average concentrated irradiance of up to 4.31 KW/m² transmitted through the semi-transparent solar cells is sufficient for high-temperature thermal utilization.

半透明太阳能电池可用于光谱分束（SBS），其中短波长光子转换为电能，长波长光子传输到热吸收器。然而，这些吸热器只能产生低等级的热能，因为半透明太阳能电池不能集中长波长光子。在本研究中，基于调节辐射场以匹配按需能量转换的思想，采用单片光伏（PV）调节全太阳光谱的光子捕获实现热电联产的策略。提出了电力和高品位热能。设计并制作了底部具有锯齿状凹槽结构的半透明太阳能电池。该电池可以将 400-800 nm 波长的光子转化为电能，并将 800-2500 nm 波长的光子聚焦到一个小点上以产生高温热能。建立了一种新型的基于α-Si薄膜半透明太阳能电池的SBS混合光伏/聚光太阳能热系统。通过室内外实验验证了系统的可行性。全光谱太阳能的利用效率可达77%。高达 4.31 KW/m 的高平均集中辐照度²透过半透明太阳能电池足以进行高温热利用。