Journal Article

Tunable Emission and Color Temperature of Yb3+/Er3+/Tm3+-Tridoped Y2O3-ZnO Ceramic Nano-Phosphors Using Er3+ Concentration and Excitation Pump Power

Xu, Boxu, Song, Jie, Lin, Shaomin, Chen, Guangxu, Song, Jun, Huang, Rui, Zhang, Yi, Song, Chao, Lin, Zhenxu, Guo, Yanqing

2022

Overview

In this study, a series of well-crystallized Yb3+/Er3+/Tm3+-tridoped Y2O3-ZnO ceramic nano-phosphors were prepared using sol–gel synthesis, and the phosphor structures were studied using X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The phosphors were well crystallized and exhibited a sharp-edged angular crystal structure and mesoporous structure consisting of 270 nm nano-particles. All phosphors generated blue, green, and red emission bands attributed to Tm: 1G4→3H6, Er: 2H11/2 (4S3/2)→4I15/2, and Er: 4F9/2→4I15/2 radiative transitions, respectively. Increasing in luminescent centers, weakening of lattice symmetry, and releasing of dormant rare earth ions can enhance all emissions. Er3+ can obtain energy from Tm3+ to enhance green and red emission. These colors can be tuned by optimizing the doping concentrations of the Er3+ ion. The color coordinates were adjusted by tuning both the Er3+ concentration and excitation laser pump power to shift the color coordinates and correlated color temperature. The findings of this study will broaden the potential practical applications of phosphors.

• Publisher: MDPI AG,MDPI
• Subject: adjustable color / Color / Color temperature / Crystal structure / Crystallization / Emission spectra / Emissions / Erbium / Excitation / High temperature / Lasers / Metal ions / Morphology / nano-phosphor / Nanoparticles / Nanophosphors / Phosphors / Photocatalysis / Scanning electron microscopy / Sol-gel processes / sol–gel synthesis / Spectrum analysis / Thermogravimetric analysis / Thulium / white light / X-ray diffraction / Y2O3 / Ytterbium / Yttrium oxide / Zinc oxide