Figure 5: The temperature- and thickness-dependent photoluminescence studies.
From: Size-dependent phase transition in methylammonium lead iodide perovskite microplate crystals
(a) The temperature-dependent P2/P1 ratios for a 17-, 50-, 90- and 150-nm-thick halide perovskite microplates excited by a 488-nm laser with a power of 3.5 μW. (b) The P2/P1 ratios for halide perovskite microplates with various thicknesses at 77 K. (c,d) The temperature-dependent emission energy for tetragonal phase (c) and orthorhombic phase (d). (e,f) The temperature-dependent full-width at half-maximum (FWHM) for tetragonal phase (e) and orthorhombic phase (f).
