Discontinuous Layered Lead-Bromide Perovskite

Instead of continuous Pb–Br sheets, the structure consists of isolated linear Pb₃Br₁₄ octahedral islands. The anisotropic in-plane arrangement of the structure is confirmed by angle-resolved polarized Raman spectroscopy which reveals directional vibrational modes aligned with the octahedral island orientation.

Despite the discontinuous lattice, transient photoluminescence microscopy demonstrates efficient in-plane exciton transport. Exciton diffusion is over three times faster along the c-axis (0.149 cm²/s) than along the a-axis (0.042 cm²/s), attributed to preferential near-field resonant energy transfer between aligned transition dipoles The full dataset consists of three complimentary datasets: Transient photluminescence microsocopy data (folder 'data_*/anisotropic_diffusion/' and 'data_*/diffusion/').