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Abstract Multicomponent nanocomposite colloidal spheres were synthesized with NaYF4:Yb,Er upconversion nanoparticle and CdSe quantum dots for tailoring visible emission. The CdSe/NaYF4:Yb,Er colloidal spheres were synthesized by improved emulsion-based self-assembly approach.… Click to show full abstract
Abstract Multicomponent nanocomposite colloidal spheres were synthesized with NaYF4:Yb,Er upconversion nanoparticle and CdSe quantum dots for tailoring visible emission. The CdSe/NaYF4:Yb,Er colloidal spheres were synthesized by improved emulsion-based self-assembly approach. They are well-dispersed in the colloidal sphere by electron diffraction X-ray mapping patterns. The colloidal spheres exhibited near-infrared photoresponse property. The intensity of short-wavelength emission at 408 nm was drastically weakened, and a red emission at 655 nm is substantially increased. Both the mechanism and multi-photon process of upconversion photoresponse was determined. It offers facile strategy to assemble multicomponent nanocomposite colloidal spheres for tuning visible emission.
Journal Title: Scripta Materialia
Year Published: 2019
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