~2 碌m Luminescence properties and nonradiative processes of Tm³⁺ in silicate glass

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• 作者：Xueqiang Liu^a ; ^b ; Ming Li^a ; ^b ; Xin Wang^a ; ^b ; Feifei Huang^a ; ^b ; Yaoyao Ma^a ; ^b ; Junjie Zhang^c ; Lili Hu^a ; Danping Chen^a ; ^{dpchen2008@aliyun.com" class="auth_mail}
• 关键词：Tm3+ ; Silicate glass ; Fluoride ; Emission cross sections ; Quantum efficiency
• 刊名：Journal of Luminescence
• 出版年：June, 2014
• 年：2014
• 卷：150
• 期：Complete
• 页码：40-45
• 全文大小：966 K

文摘

Two novel Tm³⁺-doped silicate glasses (one with fluoride addition) with good thermal stability were prepared in this work. Luminescence properties of these two samples were compared. After the addition of fluoride, the luminescence intensity of 1.8 碌m was much improved whereas that of 1.47 碌m was reduced. The rates of nonradiative processes populating and depopulating ³F₄ were calculated quantitatively and a new method of calculating the quenching rate of hydroxyls was proposed. It was found that multiphonon relaxation rate of ³F₄鈫?sup>3H₆ was really low and could be neglected in both samples. The addition of fluoride in glass could reduce the quenching rate of hydroxyls but raised the cross-relaxation (³H₆+³H₄鈫?sup>3F₄+³F₄) rate. Thus the quantum efficiency of 1.8 碌m luminescence was improved after the introduction of fluoride.