A Host Crystal for the Rare-Earth Ion Dopants: Synthesis of Pure and Ln-Doped Urchinlike BiPO4 Structure and Its Photoluminescence

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• 作者：Mingyun Guan ; Jianhua Sun ; Feifei Tao ; Zheng Xu
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：August 2008
• 年：2008
• 卷：8
• 期：8
• 页码：2694-2697
• 全文大小：280K
• 年卷期：v.8,no.8(August 2008)
• ISSN：1528-7505

文摘

We for the first time report the synthesis of urchinlike BiPO₄ structure composed of nanorods and its photoluminescence properties. Scanning electron microscopy (SEM) images show urchinlike BiPO₄ structure composed of nanorods. The X-ray powder diffraction (XRD) pattern indicates that the crystal structure of the nanorod is monoclinic. The high-resolution transmission electron microscopy (HRTEM) image and Fast-Fourier-transform (FFT) pattern reveal the single-crystalline nature of the nanorod. The formation mechanism was proposed. BiPO₄ displays strong blue emission. Because of the similarities of the crystal structure and lattice constants and the suitable energy level with the rare-earth phosphate, BiPO₄ is a useful host for rare-earth ions. Ln³⁺ is successfully doped in BiPO₄ and an efficient energy transfer from Bi³⁺ to Ln³⁺ takes place, which makes BiPO₄:Ln (Ln = Eu, Tb, Dy) emit strong luminescence in visible region. BiPO₄:Ln will have promising application in high-performance luminescence devices, etc.