Hydrothermal synthesis of water-soluble Mn- and Cu-doped CdSe quantum dots with multi-shell structures and their photoluminescence properties
Hisaaki Nishimura, Kazushi Enomoto, Yong‐Jin Pu, DaeGwi Kim
Abstract
; therefore, the QD size and doping level could be controlled independently and interference from the self-purifying effect could be avoided. When CdSe cores with diameters less than 1.9 nm were used, Mn-related photoluminescence (PL) was observed as the main PL band, whereas the band-edge PL was mainly observed when larger CdSe cores were used. Furthermore, using ZnS:Cu as the doping shell layer, CdSe/ZnS:Cu/ZnS and ZnSe/ZnS:Cu/ZnS nanoparticles were successfully synthesized, and Cu-related PL was clearly observed. These results indicate that the core/shell/shell QD structure with doping in the shell layer is a versatile method for synthesizing doped QDs.
Topics & Concepts
PhotoluminescenceQuantum dotHydrothermal circulationDopingShell (structure)Materials scienceHydrothermal synthesisNanotechnologyChemical engineeringOptoelectronicsComposite materialEngineeringQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsAdvanced Photocatalysis Techniques