高性能、光冲击稳定的钙钛矿室内光伏器件

Perovskite solar cells offer great potential as a sustainable power source for distributed electronic devices that operate indoors.However,the impact of advanced lighting technology,especially the widely used pulse width modulation(PWM)technology,on perovskite photovoltaics has been ignored.Herein,for the first time in photovoltaics,we find that the light impact emitted by the PWM lighting system caused dynamic strain in perovskite thin films,induced phase separation,and accelerated the generation of metallic lead(Pb^(0))defects,leading to irreversible degradation of the cell performance after 27 h(T_(80)).To address this issue,formamidinium triiodide(FAI_(3))is chosen to treat the surface of the perovskite and release residual stress,resulting in reduced lattice deformation during dynamic strain processes.Meanwhile,it suppresses harmful Pb0 defects and reduces Voc loss at low light intensity.The champion device achieves impressive power conversion efficiency(PCE)of 35.14%and retains 99.5%of the initial PCE after continuous strobe light soaking for 2160 h.

双面钙钛矿太阳能电池:不局限于反射利用的通用组件

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.