• By low-temperature aging, superior bromine-free FA_1–xMA_xPbI₃ perovskite film is realized.

• By suppressing lead iodide on the surface of perovskite, no further passivation step or layer is needed. The efficiency of planar perovskite solar cells is improved to 22.41% with robust reproducibility.

中文翻译：

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低温老化可提供22％的高效无溴和无钝化层的平面钙钛矿太阳能电池

• 通过低温老化，可以实现优异的无溴FA ₁ – _x MA _x PbI ₃钙钛矿薄膜。

• 通过抑制钙钛矿表面上的碘化铅，不需要进一步的钝化步骤或钝化层。平面钙钛矿太阳能电池的效率提高到22.41％，再现性强。