Photoluminescence properties of YVO₄:Eu³⁺,Ba²⁺ nanoparticles prepared by an ion exchange method

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• 作者：Yucheng Zhan ; Guoping Du ; ^{guopingdu@ncu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Nan Chen ; Yingyi Li ; Bingfa Liu ; Guihua Liu
• 关键词：Lanthanide doped YVO4 nanoparticle ; Ion exchange ; Photoluminescence
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：41
• 期：Complete
• 页码：233-239
• 全文大小：2347 K

文摘

YVO₄:Ba²⁺ nanoparticles with a Ba²⁺ doping concentration x=0%, 1%, 3%, 5%, 7% and 9% were synthesized by a solvothermal method and then they were codoped with Eu³⁺ ions by an ion exchange method to form the YVO₄:Eu³⁺,Ba²⁺ nanoparticles. It was found that the photoluminescence intensity of the as-prepared YVO₄:Eu³⁺,Ba²⁺ nanoparticles steadily increased with x until x=7%, and then decreased for higher x. Thermal annealing resulted in considerable enhancement in their photoluminescence, and higher annealing temperature led to stronger photoluminescence enhancement. The emission intensity of the YVO₄:Eu³⁺,Ba²⁺ (x=7%) nanoparticles annealed at 500 °C was about 205% stronger than the sample without Ba²⁺ doping. Thermal annealing of the ion-exchanged YVO₄:Eu³⁺,Ba²⁺ nanoparticles at 500 °C and 700 °C resulted in photoluminescence enhancement of about 14 times and 27 times, respectively. The asymmetric ratio of Eu³⁺ in the ion-exchanged YVO₄:Eu³⁺,Ba²⁺ nanoparticles was found to increase after annealing.