It is generally agreed that the phosphorescence of Eu²⁺ in most of hosts is believed to be caused by the 4f-5d transitions, and the peak positions in the mission spectra depend strongly on the nature of the Eu²⁺ surroundings in host lattices. Alkaline earth silicates are useful luminescent hosts with stability, and therefore, a great deal of work has been done on rare earth ion activation of these hosts. Ca₃MgSi₂O₈ and Eu²⁺ ion have been attracted as a host material and an activator for phosphor, respectively. In Ca₃MgSi₂O₈ crystal structure, there are two kinds of coordination number for Ca²⁺, and so the corresponding r is 0.112 nm (n=8) and 0.118 nm (n=9), respectively. And r is 0.065 nm for Mg²⁺ with the coordination number 6. Ca₃MgSi₂O₈ thin films have been grown on various substrates using a pulsed laser deposition technique. The substrate was Al₂O₃ (0001). Thin films were grown under the various oxygen pressures and various substrate temperatures. The crystalline structure, surface morphology characteristics, chemical states, and photoluminescence properties of the Eu-doped Ca₃MgSi₂O₈ films were analyzed using X-ray diffraction (XRD), scanning electron microscope (SEM), and atomic force microscopy (AFM), respectively. The films grown at various deposition conditions show the different crystallinity, surface morphology, and luminescent properties. The room temperature photoluminescence spectra were dominated by the emission peak at 477 nm radiated from the transition of 4f-5d within Eu²⁺ ions. We found that the luminescence spectra of the films are highly dependent on the crystallinity and surface roughness of the films. And the surface roughness and luminescence intensity of the films showed similar behavior grown on various deposition condition.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/11393 must be provided.

1. Low temperature Synthesis of nanoparticle GdVO₄:Eu³⁺ by solvothermal method
2. Solvo-thermal synthesis of Zn_1-xLi_xO (x = 0.0 ~ 0.20) nano-particles