“… 6–10 The size reduction of CsI from bulk crystals to NCs possibly leads to three-dimensional confinement and more overlap of electron and hole wavefunctions, resulting in optical transitions with higher efficiency and faster rates. 11–13 Therefore, the use of CsI NCs as nanoscitillators is expected to eliminate the issue of slow response of conventional scintillator detectors, and the excellent solubility of CsI colloidal NCs in organic solvents also enables solution-processable devices with low cost. However, the controlled synthesis of high-quality CsI colloidal NCs with tunable morphologies still remains a challenging task, 14 due to its ionic characteristics as mentioned above.…”