Pressure-Induced Detrapping from Self-Trapped Excitons to Free Excitons toward Enhanced Emission and Piezochromism in Ruddlesden-Popper (110)-Oriented Perovskites.

ABSTRACT: Two-dimensional (2D) lead halide perovskites are emerging as excellent materials for optoelectronic applications including light-emitting diodes, photovoltaics, and photodetectors, owing to their efficient excitonic emission originating from both self-trapped excitons (STEs) and free excitons (FEs). Recently, many efforts have been focused on enhancing the emission intensity, modulating the dominant emission mechanism, and establishing direct correlations between optical properties and underlying structural motifs. Across the hybrid organic-inorganic layers in 2D perovskites, the nanorange modulation of the density, stiffness, strain, and ionicity can be efficiently tuned by external stimuli, including the substrate-film strain. Here, we report a pressure-induced narrowing of the band gap

SUBMITTER: Maczka M 

PROVIDER: S-EPMC12557188 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature