Journal Article Research Support, U.S. Gov't, Non-P.H.S. perovskite solar cells Fullerenes Polymers Research Support, Non-U.S. Gov't all‐perovskite tandem solar cells all‐polymer system amphiphilic molecules carbazole crystallization crystallization kinetic crystallization regulation cuffless blood pressure (BP) monitoring cyanine‐like degradation detectivity dielectric effecive bandgap electroabsorption figure‐of‐merits free carrier generation hole-selective layer hybrid Sn‐Pb perovskites in situ optical method indium tin oxide contact ion consumption ion dissociation mixed halide perovskites multiple cation‐composited perovskites