Uchida, R.等人研究了铯(Cs⁺)和铷(Rb⁺)在多元杂化钙钛矿太阳能电池中的作用。调查结果表明Cs⁺的含量小于10%可以掺入钙钛矿晶格里，Rb⁺因其离子半径过小，无法影响钙钛矿晶格。Rb⁺和过多的铯Cs⁺均会起到负面作用：非辐射复合增加，电池效率降低。

Uchida, R., Binet, S. et al. Insights about the Absence of Rb Cation from the 3D Perovskite Lattice: Effect on the Structural, Morphological, and Photophysical Properties and Photovoltaic Performance. Small.

Doi:10.1002/smll.201802033.

https://doi.org/10.1002/smll.201802033.