Ferroelastic domain walls in CsPbBr3 show reduced cathodoluminescence intensity, a slight redshift, and localized second-order Raman modes, suggesting electron-phonon coupling drives charge separation.
(b-f) shows the Raman maps of the five PCA components across the sample region
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Ferroelastic Domain Induced Electronic Modulation in Halide Perovskites
Ferroelastic domain walls in CsPbBr3 show reduced cathodoluminescence intensity, a slight redshift, and localized second-order Raman modes, suggesting electron-phonon coupling drives charge separation.