Technology News and Headlines

Unraveling Transformation Pathways of Colloidal Semiconductor Perovskite Magic‐Sized Clusters at Sub‐Ambient Temperature

Researchers have mapped three transformation pathways for colloidal semiconductor perovskite magic-sized clusters (MSCs) at sub‑ambient temperatures. They demonstrate a direct thermally‑induced conversion (Pathway 3) and a precursor‑compound‑assisted route (Pathway 1) between binary PbBr₂ MSCs (≈390 nm absorption) and ternary CsPbBr₃ MSCs (≈415 nm absorption). Raising the reaction temperature to 80 °C triggers dissociation of the CsPbBr₃ MSCs (Pathway 2), producing monomers that grow into larger nanocrystals. The study combines experimental spectroscopy with theoretical modeling to elucidate composition and structural changes.