Properties of Ce³⁺-Doped Y₃Al₅O₁₂Phosphor Nanoparticles Formed by Laser Ablation in Liquid

Abstract

Y 3 Al 5 O 12 : Ce 3+ (YAG: Ce) nanoparticles were generated by the laser ablation from the micron-size YAG: Ce particles suspended in deionized water as a target suspension. The mean diameter of nanoparticles observed by a scanning electron microscopy were about 15-300 nm, and the morphology showed a dependence on an average energy density of Nd: YAG laser. The photoluminescence spectra exhibited peaks at 510 and 560 nm which are attributed to the 5d→4f transition of the Ce 3+ activator. The luminescence intensity for the nanoparticles generated by the suspension increased with increasing the average energy density of Nd: YAG laser, and the intensity of 510 nm peak also exhibited higher than that for the nanoparticles generated by the micron-size particles precipitated on a bottom of vial. It was found that the laser ablation in liquid using the suspension was effective to generate the YAG: Ce phosphor nanoparticles.

Nanolayer Growth on 3-Dimensional Micro-Objects by Pulsed Laser Deposition

“…This effect has been previously observed in the emission of YAG:Ce nanoparticles [35] and it was attributed to the reduced local field of the Ce + ion and the induced decrease in the 4f-state splitting. Similar effects have also been observed in the spectra of YAG:Ce nanoparticles produced by laser ablation in liquid [36]. This latter evidence verifies the presence of active phosphor nanoparticles embedded in the grown matrix and validates the suitability of PLD in the fabrication of hybrid functional nanolayers on 3D surfaces.…”

Аэрозольный синтез высокодисперсного люминофора Y-=SUB=-3-=/SUB=-Al-=SUB=-5-=/SUB=-O-=SUB=-12-=/SUB=- : Ce-=SUP=-3+-=/SUP=- с интенсивной фотолюминесценцией

“…Чтобы преодолеть вышеуказанные недостатки, разрабатываются различные методы для производства чистых и гомогенных высокодисперсных люминофоров YAG : Ce 3+ , такие, как метод контролируемой кристаллизации стекла [5], пламенный пиролиз [6], золь-гель процесс [7], [8], лазерная абляция [9], гидротермальный метод с использованием микроволнового излучения [10], соосаждение из растворов соответствующих солей [11], метод пиролиза аэрозоля [12].…”