Facile synthesis of Cd1-xZnxSe1-ySy/CdSe/Cd1-xZnxSe1-ySy nanoplatelets with precisely controlled emission wavelength

Abstract

A facile synthetic strategy toward passivating Cd1-xZnxSe1-ySy shell on CdSe core nanoplatelets (NPLs) with a graded chemical composition gradient was introduced via a one-pot synthesis approach by capitalizing on the difference of chemical reactivity between cadmium oleate and zinc oleate precursors. Plain CdSe NPLs were first synthesized and then followed by precise passivation with the graded Cd1-xZnxSe1-ySy shell. The effect of precursor solubility on the morphology of NPLs was corroborated by transmission electron microscopy characterization. The photophysical properties of NPLs were explored using a UV–vis spectrometer and a spectrofluorometer. © 2022 Elsevier B.V.