The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites
Anna Osherov (Massachusetts Institute of Technology)
Eline M. Hutter (TU Delft - ChemE/Opto-electronic Materials)
Krzysztof Galkowski (Laboratoire National des Champs Magnétiques Intenses (LNCMI), University of Warsaw)
Roberto Brenes (Massachusetts Institute of Technology)
Duncan K. Maude (Laboratoire National des Champs Magnétiques Intenses (LNCMI))
Robin J. Nicholas (University of Oxford)
Paulina Plochocka (Laboratoire National des Champs Magnétiques Intenses (LNCMI))
Vladimir Bulović (Massachusetts Institute of Technology)
Tom J. Savenije (TU Delft - ChemE/Opto-electronic Materials)
Samuel D. Stranks (Massachusetts Institute of Technology, Cavendish Laboratory)
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Abstract
The extent to which the soft structural properties of metal halide perovskites affect their optoelectronic properties is unclear. X-ray diffraction and micro-photoluminescence measurements are used to show that there is a coexistence of both tetragonal and orthorhombic phases through the low-temperature phase transition, and that cycling through this transition can lead to structural changes and enhanced optoelectronic properties.