Fig. 1: Characterizations of CsFAGA single crystals. | Nature Photonics

Fig. 1: Characterizations of CsFAGA single crystals.

From: Synergistic strain engineering of perovskite single crystals for highly stable and sensitive X-ray detectors with low-bias imaging and monitoring

Fig. 1

a, Goldschmidt tolerance factor of APbI3 perovskites with different A-site cations. The bottom-right inset shows the crystal structure of CsFA. The Pb atoms are depicted with green balls; Br, red; I, pink; Cs, yellow; C, black; N, blue. The top-left inset shows the structural model for APbI3 with a large organic cation, such as dimethylammonium (DMA) and GA, where a 3D perovskite structure cannot be maintained. b, XRD patterns of grounded powders obtained from Cs0.1FA0.9–zGAzPb(I0.9Br0.1)3 (z = 0, 0.03, 0.05, 0.08) precursor solution; for convenience, they are simplified as pristine (CsFA) and GAz (z = 0.03, 0.05, 0.08) crystals, respectively. c, Enlarged powder XRD spectra of the (100) plane of CsFA and CsFAGA (referring to Cs0.1FA0.85GA0.05Pb(I0.9Br0.1)3). d, X-ray 2θ scan on the top facet of CsFA and CsFAGA single crystals and a photograph (inset) of the CsFAGA single crystal. e, High-resolution XRD rocking curve of the (110) diffraction of CsFA and CsFAGA crystals. The insets in c and e show the schematic of the macrostrain and microstrain after GA incorporation, respectively.

Back to article page