Dimensionality-dependent electronic and vibrational dynamics in low-dimensional organic-inorganic tin halides.

ABSTRACT: Photo-induced dynamics of electronic processes are driven by the coupling between electronic and nuclear degrees of freedom. Here, we construct one- and two-dimensional organic-inorganic tin halides to investigate how dimensionality controls exciton-phonon coupling and exciton self-trapping. The results show that a one-dimensional system has strong exciton-phonon coupling leading to excitation-independent self-trapped exciton emission, whereas a two-dimensional system exhibits over ten times weaker coupling resulting in free exciton emission. The difference originates from enhanced Anderson localization in a one-dimensional system. Femtosecond transient absorption experiments directly resolve room-temperature vibrational wavepackets in a one-dimensional system, some of which propagate alon

SUBMITTER: He Y 

PROVIDER: S-EPMC12820188 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature