Tunable multicolor and bright white emission in PEG modified β-NaGdF₄ nanocrystals by systematic introduction of Ce³⁺ and Mn²⁺/Ln³⁺

Abstract

Effective multicolor and strong white light emission were realized in NaGdF4:Ce NPs by precisely adjusted the doping amounts of Dy3+ and Eu3+.

Dual-mode luminescence anti-counterfeiting and white light emission of NaGdF4:Ce,Eu,Tb/carbon dot hydrophilic nanocomposite ink

“…It is proved that there is an energy conversion between Ce 3+ and Tb 3+ ions. 4,23 Fig. 6(d) shows the emission spectra of nanocrystals excited at 254 nm.…”

“…1,2 Because of the excellent physical and chemical properties such as low phonon energy, high chemical stability and easy modication of surface structure, rare earth-doped uoride has attracted much attention in the eld of luminescent anti-counterfeiting materials. [3][4][5] Hu et al prepared multicolor luminescent NaGdF 4 nanocrystals based on Ce/Yb/Ho triple doping with temperature responses. 6 The core nanocrystals can be directly used to manufacture anti-counterfeit inks without further processing, which provides a new idea for anti-counterfeiting technology.…”