Abstract
We describe the growth of single crystals of halide perovskites APbBr3, with varying ratios of Cs to methylammonium (MA) on the A site, by antisolvent vapor-assisted crystallization (AVC), and char...
Highlights
Halide perovskites (HaPs) constitute an intensely investigated group of semiconductors for use in thin polycrystalline films in photovoltaic cells and LEDs and as single crystals in radiation detectors
The crystals were characterized by energydispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), temperature-dependent powder X-ray diffraction, inductively coupled plasma mass spectrometry (ICP-MS), thermogravimetric analysis (TGA), and photoluminescence (PL)
Since ICP-MS is not very sensitive for N analysis, and TGA cannot differentiate between the absolute amount of Cs and Pb, TGA and ICP-MS are complementary techniques for the quantification of the crystal compositions
Summary
Halide perovskites (HaPs) constitute an intensely investigated group of semiconductors for use in thin polycrystalline films in photovoltaic cells and LEDs and as single crystals in radiation detectors. EFAxaPmbpI3l,e1s2,13areFAMPbABPr3b,I132,6a,7n,1d0,1C1 sPMbABrP3b.8B,1r43−,61,811A,12lsoM, cAryPsbtCalsl3,o11f some Sn perovskites have been prepared by solid-state reactions at elevated temperatures.[19] as already mentioned above, the best cells use HaP films which contain mixtures of different A cations and with some iodide replaced by bromide. During preparation, dissolving MABr in DMF, containing partially dissolved CsBr and PbBr2, led to the formation of an orange and white precipitate (described and discussed in section 4 in the Supporting Information). Single crystals of MAPbBr3, CsPbBr3, and (MA,Cs)PbBr3 with varying Cs/Pb ratios were grown at room temperature using the AVC method. The crystals were characterized by energydispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD), temperature-dependent powder X-ray diffraction, inductively coupled plasma mass spectrometry (ICP-MS), thermogravimetric analysis (TGA), and photoluminescence (PL)
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