Mechanical properties estimation of 2D–3D mixed organic-inorganic perovskites based on methylammonium and phenylethyl-ammonium system using a combined experimental and first-principles approach

Scanning Photocurrent Microscopy in Single Crystal Multidimensional Hybrid Lead Bromide Perovskites

“…We attribute the presence/absence or differences in the symmetry of this peak to experimental conditions related to the contact of the electronic probe. Indeed, the peak at the origin is not present in the 2D–3D crystal, likely due to its fragility compared to the 3D perovskite [ 56 , 57 ].…”

“…We attribute the presence/absence or differences in the symmetry of this peak to experimental conditions related to the contact of the electronic probe. Indeed, the peak at the origin is not present in the 2D-3D crystal, likely due to its fragility compared to the 3D perovskite [56,57]. On the other hand, more complex models with additional parameters were required in the 3D case (Figure 6c,d) because the experimental curves (red lines) display richer profiles.…”

Piezoelectric Charge Coefficient of Halide Perovskites

“…Nanorods of mixed halide composition of the same 2D perovskite [(ATHP)2PbBr 2 Cl 2 ] have shown an even higher g 33 coefficient of 900 mVm/N and a d 33 coefficient of 64.6 pC/N [74]. Using these reported d 33 and g 33 coefficients and the elastic Young's modulus of 2D perovskites as ~15 GPa [75], we estimated the electromechanical coupling coefficient (k 2 = dgY) as high as 0.8 for 2D halide perovskites. Following the same strategy, the estimation of k 2 for 3D halide perovskites (e.g., MAPbBr 3 ) gives a value less than 0.1 by taking the d 33 as 20 pC/N (Table 1), the relative dielectric function as 22 [76], and the elastic modulus as ~20 GPa [75].…”

“…Using these reported d 33 and g 33 coefficients and the elastic Young's modulus of 2D perovskites as ~15 GPa [75], we estimated the electromechanical coupling coefficient (k 2 = dgY) as high as 0.8 for 2D halide perovskites. Following the same strategy, the estimation of k 2 for 3D halide perovskites (e.g., MAPbBr 3 ) gives a value less than 0.1 by taking the d 33 as 20 pC/N (Table 1), the relative dielectric function as 22 [76], and the elastic modulus as ~20 GPa [75]. These calculations show the very promising potential of low-dimension halide perovskites for efficient mechanical energy harvesting.…”

Correction to “Inelastic Deformation in Methylammonium Lead Iodide Perovskite and Mitigation by Additives during Thermal Cycling”

“…Therefore, the inclusion of 5-AVACl increasedrather than decreasedthe biaxial modulus of MAPbI 3 films. While these correctly calculated biaxial moduli were significantly higher than those cited for comparison in the manuscript, they were similar to moduli reported elsewhere. , Importantly, this correction did not affect any figures in the manuscript or Supporting Information nor did it change our initial conclusions that incorporating 5-AVACl into MAPbI 3 films reduced stress relaxation and improved resilience to plastic deformation.…”