Transition from Light-Induced Phase Reconstruction to Halide Segregation in CsPbBr_3-xI_<i>x</i> Nanocrystal Thin Films.

ABSTRACT: Inorganic metal-halide perovskite materials pave the way for many applications ranging from optoelectronics to quantum information due to their low cost, high photoluminescence and energy conversion efficiencies. However, light-induced bandgap instability due to ion migration in mixed-halide perovskites remains a significant challenge to the efficiency of optoelectronic devices. Thus, we combined hyperspectral fluorescence microspectroscopy and computational methods to understand the underlying transition mechanism between phase reconstruction and segregation in CsPbBr_3-xI_x (0 < x < 3) nanocrystal thin films. Our outcomes have shown that samples with x = 1.0 and x = 1.5 exhibit halide migration, favoring Br enrichment locally. In this case, an interplay

SUBMITTER: da Cunha TR 

PROVIDER: S-EPMC11891859 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature