Controlling the Morphology and Size of GdF₃:RE³⁺ (RE = Dy, Tb, and Sm) by pH Value: Growth Mechanism, Energy Transfer, and Luminescent Properties

Abstract

In this paper, the synthesis of rare earth fluoride GdF3 multiform morphologies via a glutamic acid hydrothermal method has been fulfilled. The size and shape of the products could be tuned just by adjusting the pH values of the initial reaction solutions. The morphologies for the products include spindle-like, peanut-like, submicrometer flowers, and nanoflowers. Additionally, the possible formation mechanism of multiform morphologies was proposed. Furthermore, we systematically investigate the luminescence properties of different lanthanide ions (Dy3+, Tb3+, and Sm3+) in GdF3 host. In the GdF3:Tb3+,Sm3+system, the energy transfer process fromTb3+ to Sm3+ was demonstrated to be resonant type via a dipole–dipole mechanism. Most interestingly, white light and multicolor light have been obtained in Tb3+ and Sm3+ coactivated or Dy3+,Tb3+,Sm3+ tridoped GdF3 phosphors. The results show that the obtained nanophosphors have a promising application in display and lighting fields.

Controllable synthesis of glass ceramics containing YF3:Eu3+ nanocrystals: Well‐preserved Eu and prolonged lifetime

“…Among them, YF 3 NCs with low phonon energy (360 cm −1 ), wide bandgap and comparable ion size of Y with Eu + ion, has aroused considerable attention as host matrix of Eu 3+ . Eu 3+ ‐doped YF 3 fluorescent materials present excellent red emitting and hold the potential to be widely used in display devices, optical data storage, and optical communication . However, the aging issue and short light emitting lifetime caused by the poor thermal stability of fluoride hosts limit their applications in photonic device.…”

“…Eu 3+ -doped YF 3 fluorescent materials present excellent red emitting and hold the potential to be widely used in display devices, optical data storage, and optical communication. [5][6][7][8][9][10] However, the aging issue and short light emitting lifetime caused by the poor thermal stability of fluoride hosts limit their applications in photonic device.…”

Yttrium(iii) coordination polymer micro/nanospheres with single ligand and dual ligands

“…The complexes have various interesting properties such as cytotoxicity and luminescence. Furthermore, the morphology and structure of the lanthanide coordination polymers are affected by several factors, such as the molar ratio of ligand (including vanillin, asparagine) and rare earth, 25,26 reaction temperature, 25,[27][28][29][30] pH, 25,27,28 and reaction time.…”

Multimorphology Mesoporous Silica Nanoparticles for Dye Adsorption and Multicolor Luminescence Applications

“…And as a member of IV oxide, SiO 2 can be easily synthesized by sol–gel method at low temperature . Hence, if phosphors are prepared in this way, one can effectively avoid the harsh experimental conditions of traditional methods, such as prolonged high temperature or high pressure required for solid phase and hydrothermal methods. , Moreover, the network structure of SiO 2 has a good protective effect on the lanthanide ions doped inside . And there is rare report about the relationship between different surface structure and luminescence property.…”