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Abstract Pb‐free Cs 2 SnI 6 perovskite nanoparticles with different morphologies are synthesized using hot injection process and precise control of ligand chemistry. Size dependent band gap variation is studied to evaluate quantum‐confinement effect in the system. Stable and fast photodetector with high current gain is fabricated by using the nanoparticles as colloidal ink.
Ghosh et al. (Wed,) studied this question.