Effect of annealing temperature on luminescence properties of ZnWO4 :Eu3+ nanophosphor. (1st May 2019)

• Record Type: Journal Article
• Authors: Li, Chunyang; Du, Xiaodi; Shi, Yurong; Wang, Zhenling
• Is Part Of: Micro & nano letters. Volume 14:Number 5(2019)
• Page Start: 496
• Page End: 500
• Publication Date: 2019-05-01
• Subjects: crystal morphology -- nanofabrication -- visible spectra -- zinc compounds -- photoluminescence -- X‐ray diffraction -- ultraviolet spectra -- phosphors -- scanning electron microscopy -- precipitation (physical chemistry) -- annealing -- europium -- field emission scanning electron microscopy -- nanostructured materials; annealing temperature -- luminescence properties -- zinc tungstate -- self‐activating phosphor -- broad band blue‐green emission -- ultraviolet excitation -- liquid precipitation method -- X‐ray diffraction -- transmission electron microscopy -- field emission scanning electron microscopy -- photoluminescence spectra -- luminescent properties -- emission colour -- morphology -- crystallinity -- crystal defects -- temperature 900.0 degC -- ZnWO4:Eu3+; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2018.5651
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : Zinc tungstate (ZnWO4 ) is a self‐activating phosphor and exhibits a broad band blue‐green emission under ultraviolet excitation. When doped with Eu 3+ ions, ZnWO4 may emit white light due to the fact that WO4 2− could effectively transfer energy to Eu 3+ ion. In this work, ZnWO4 :Eu 3+ phosphors were fabricated by the liquid precipitation method, and then X‐ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, and photoluminescence spectra were used to investigate the morphology, structure, and luminescent properties. The emission colour of synthesised ZnWO4 :Eu 3+ phosphors can be tuned from pink to white with increasing the annealing temperature, which may be attributed to the change of the crystallinity and the crystal defects in ZnWO4 :Eu 3+ phosphors. What is more, ZnWO4 :Eu 3+ phosphors emit an idea white light with the Commission International de L'Eclairage coordinates (0.32, 0.32) after annealing at 900°C.