Ce ³⁺ ‐doped neodymium phosphate nanostructures: controllable synthesis, influencing factors, and photoluminescence properties

Abstract

Wire-like and flower-like cerium ion (Ce 3+)-doped neodymium phosphate nanostructures (NdPO 4 :Ce 3+ NSs) were synthesised via a direct precipitation process at room temperature. The different reaction conditions such as the phosphate anion source, solvent, and surfactant were carried out to discuss the influence for the morphologies and photoluminescence (PL) properties. Experimental results showed that the surfactants of dodecyl benzene sulphonic acid sodium and dodecyl sulphonic acid sodium play an important role in controlling the flower-like NdPO 4 :Ce 3+ NSs. The flower-like NdPO 4 :Ce 3+ NSs exhibited higher PL property than that of wire-like NdPO 4 :Ce 3+ NSs.

Reducing Grain Size and Enhancing Luminescence of NaYF4:Yb3+, Er3+ Upconversion Materials

“…It is considered that the lower dielectric constant of solvent tends to induce the lower diffusion rate and solubility of the ions in the solution, and thus the smaller size is obtained . The higher viscosity can also slow down the growth rate and tend to limit crystal growth, leading to the smaller grain size . Meanwhile, the lower boiling point of the solvent will give rise to a higher saturated vapor pressure which may suppress the growth of the particles, and thus lead to the decrease of the particle size.…”

“…48 The higher viscosity can also slow down the growth rate and tend to limit crystal growth, leading to the smaller grain size. 49 Meanwhile, the lower boiling point of the solvent will give rise to a higher saturated vapor pressure which may suppress the growth of the particles, and thus lead to the decrease of the particle size. From Table 1, the methanol exhibits the smallest particle because of the lowest boiling point.…”

Synthesis of LaTb x O y :Eu 3+ nanowire arrays and study of performances on fluorescence enhancement and red shift

“…1. Introduction: Recently, rare earth(RE) nanostructured materials have been intensively studied due to their potential applications in many fields such as optical display [1][2][3][4][5], medical imaging [6][7][8][9][10][11], gaseous sensor [12][13][14][15][16], bio-labelling [17][18][19][20][21] etc., all these come from the 4f electronic structure of RE element. It is well known that RE elements possess narrow bandgap between 4f and 5d orbits, and the 4f electrons can easily transfer to 5d orbit, which leads to various oxidation states and plentiful luminescent performances for RE elements.…”