The Impact of Phase Retention on the Structural and Optoelectronic Properties of Metal Halide Perovskites.

Osherov, Anna; Hutter, Eline M; Galkowski, Krzysztof; Brenes, Roberto; Maude, Duncan K; Nicholas, Robin J; Plochocka, Paulina; Bulović, Vladimir et al. · Adv Mater · 2016

basic_science · Level V

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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.