Tunable luminescence of Ce³⁺/Li⁺, Eu²⁺ co-doped Ca₄(PO₄)₂O phosphor for white light emitting diodes

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• 作者：Yinqun LI ((李银群))^a ; Hongping MA ((马红萍))^b ; Youjie HUA ((华有杰))^a ; Qinghua YANG ((杨清华))^a ; Chenxia LI ((李晨霞))^a ; Degang DENG ((邓德刚))^a ; Shiqing XU ((徐时清))^a ; ^{sxucjlu@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：luminescence ; phosphors ; phosphate ; tunable ; white LED ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：34
• 期：1
• 页码：7-11
• 全文大小：905 K

文摘

Phosphors Ca₄(PO₄)₂O:Ce³⁺/Li⁺, Eu²⁺ were prepared by solid state reaction successfully, and characterized by X-ray diffraction, UV-Vis spectrometer and photoluminescence spectrometry. The as-prepared phosphors exhibited strong absorption in the UV-visible region and dual-emission bands centered at approximately 460 and 630 nm. Energy transfer from Ce³⁺ to Eu²⁺ was also observed. By varying the excitation wavelength, these new phosphors exhibited tunable emissions from blue to white and then to yellow, making them potential candidates as UV-convertible phosphors for white light emitting diodes.