A novel white emitting phosphor Ca₂PO₄Cl:Dy³⁺: luminescence, concentration quenching and thermal stability

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• 作者：Zhijun WANG ((王志军))^a ; Panlai LI ((李盼来))^a ; ^{lipanlai@sohu.com" class="auth_mail" title="E-mail the corresponding author} ; Zhiping YANG ((杨志平))^a ; Qinglin GUO ((郭庆林))^a ; Xu LI ((李 旭))^a ; Feng TENG ((滕 枫))^a ; ^b ; ^{fteng@bjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：luminescence ; phosphors ; Ca2PO4Cl ; Dy3+ ; white light emitting diodes ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：33
• 期：11
• 页码：1137-1141
• 全文大小：903 K

文摘

A novel white emitting phosphor Ca₂PO₄Cl:Dy³⁺ was synthesized by a solid state method. The luminescence, concentration quenching and thermal stability of Ca₂PO₄Cl:Dy³⁺ were investigated. Ca₂PO₄Cl:Dy³⁺ showed three emission peaks, which were located at 483, 575 and 660 nm. Though the ratio of yellow to blue emission intensities showed a similar value, the intensities of yellow and blue peaks were influenced by Dy³⁺ concentration, and the concentration quenching effect was observed. The emission intensity of Ca₂PO₄Cl:Dy³⁺ as a function of temperature was explored and the emission intensity (at 150 °C) of Ca₂PO₄Cl:Dy³⁺ was 90.0% of the value at 25 °C, and activation energy was 0.18 eV. The results indicated that Ca₂PO₄Cl:Dy³⁺ might be conducive to development of white LEDs.