Double-sided annealing to reverse the crystallization direction for efficient and stable flexible FACs-perovskite solar modules
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The application of methylammonium cations makes flexible perovskite solar modules (f-PSMs) unstable in long term. Here, we report flexible p-i-n structure perovskite modules made of methylammonium-free formamidinium cesium lead iodide (FA1-xCsxPbI3, x ≤ 0.1) ... ...
