Mixed-cation MAxFA1-xPbI3 perovskite crystals host multiple electron and hole spin subensembles with T1 times up to 2 ms at cryogenic temperatures, limited by nuclear Overhauser fields.
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Millisecond spin relaxation times of distinct electron and hole subensembles in MA$_x$FA$_{1-x}$PbI$_3$ perovskite crystals
Mixed-cation MAxFA1-xPbI3 perovskite crystals host multiple electron and hole spin subensembles with T1 times up to 2 ms at cryogenic temperatures, limited by nuclear Overhauser fields.