双面钙钛矿太阳能电池:不局限于反射利用的通用组件

Bifacial perovskite solar cells:a universal component that goes beyond albedo utilization

双面钙钛矿太阳能电池能够充分利用环境的反射和散射光,从而提高光伏电站的能量产量,并为建筑-光伏一体化提供更出色的美学设计,然而,双面电池的潜力不仅限于这些传统应用,它还可以作为子组件用于构建叠层电池,或与光子工程材料相结合,实现单结电池的全光谱能量利用.本综述从双面钙钛矿太阳能电池的结构入手,主要介绍了其在反射利用、半透明电池和叠层电池等方面的潜在应用,同时指出了目前面临的一些挑战,如稳定性、大面积制备、背电极载流子复合和铅毒性等问题.此外,通过详细介绍双面钙钛矿太阳能电池的设计策略和应用场景,本综述展示了光伏器件采用双面结构后所带来的巨大优势,引领了通过双面结构来提升单结性能的研究方向,为钙钛矿光伏产业化开辟了新的发展路径.

Perovskite solar cells(PSCs)have achieved remarkable progress in the past decade and become the most powerful challenger of traditional silicon photovoltaics.Among the many designs,bifacial PSCs have received widespread attention these days due to their ability to fully utilize environmental reflection and scattering light to enhance energy yield.They also can provide better aesthetic design for building-integrated photovoltaics(BIPVs).However,the potential of bifacial PSCs is not limited to these traditional applications.Importantly,such architecture also serves as a universal component for multijunction cells and photon engineering,which are both critical for further efficiency improvement.In this review,the requirements of different functional layers under various applications are described in detail,starting from the structure of bifacial PSCs.The application developments are introduced,including albedo utilization,semitransparent PSCs(ST-PSCs),TSCs.The present issues(such as stability,large area,recombination of carriers at the back electrode and toxicity etc.)and the extra challenges of bifacial PSCs are highlighted.It is hoped that this review can provide new ideas for the future development and further improve the competitiveness of PSCs.