根据Shockley-Queisser极限，1.2-1.3 eV带隙的（Pb，Sn）混合钙钛矿是单结太阳能电池的理想选择。然而，Sn（II）的不稳定性导致电池性能较差。Zong, Y.等人采用SnF2·3FACl添加剂，制备出晶粒大且均一的钙钛矿薄膜。并利用SnF2稳定钙钛矿的晶界，电池性能有大幅提升。
Zong, Y., Zhou, Z., Chen, M., Padture, N. P. & Zhou, Y. Lewis-Adduct Mediated Grain-Boundary Functionalization for Efficient Ideal-Bandgap Perovskite Solar Cells with Superior Stability. Adv. Energy Mater.
Doi:10.1002/aenm.201800997.
https://doi.org/10.1002/aenm.201800997.
