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Updated: Feb 11, 2026

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
Published on: October 1, 2019
Synthesis of Lead-free CsGeI3 Perovskite Colloidal Nanocrystals and Electron Beam-induced Transformations
Xiaotong Wu1,2, Weidong Song1, Qian Li1
1Department of Chemistry, Southern University of Science and Technology, SUSTech, Shenzhen, Guangdong, 518055, P. R. China.
Abstract:
Colloidal nanocrystals (NCs) of metal halide perovskite have recently aroused great research interest, due to their remarkable optical and electronic properties. We report a solution synthesis of a new member in this category, that is, all-inorganic lead-free cesium germanium iodine (CsGeI3 ) perovskite NCs. These CsGeI3 colloidal NCs are confirmed to adopt a rhombohedral structure. Moreover, the electron beam-induced transformations of these lead-free perovskite NCs have been investigated for the first time. The fracture of single-crystalline CsGeI3 nanocubes occurs first, followed by the emergence and growth of cesium iodine (CsI) single crystals and the final fragmentation into small debris with random orientations. Notably, the electron-reduced Ge species in CsGeI3 nanocubes exhibit a distinctive transformation path, compared to heavier Pb atoms in lead halide perovskite NCs.
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