Synthesis and luminescent properties of LaPO_4: Eu~(3+) microspheres

Yuguo Yang

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Synthesis and luminescent properties of LaPO_4: Eu~(3+) microspheres

机译：LaPO_4：Eu〜（3+）微球的合成及发光性能

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LaPO_4:Eu~(3+) microspheres were synthesized, using LaCl_3, LaCl_3 and (NH_4)_2HPO_4 as starting materials. The morphology, formation mechanism, and luminescent property of samples were systemically studied. X-ray diffraction (XRD) and infrared spectroscopy (1R) show that LaPO_4:Eu~(3+) microspheres have a pure monoclinic phase. Cetyltrimethyl ammonium bromide (CTAB) usually forms spherical micelles above a critical micelle concentration, which plays an important role in the formation of LaPO_4:Eu~(3+) micro-spheres. The excitation spectrum of LaPO_4:Eu~(3+) microspheres consists of several sharp lines due to the direct excitation of the Eu~(3+) cations from the ground state to higher levels of the 4f-manifold. The emission intensity of microspheres is higher than irregular particles because of the lowlier surface area. The lifetimes of Eu~(3+) ions in the LaPO_4:Eu~(3+) microspheres are determined to be 2.41 ms.

机译：以LaCl_3，LaCl_3和（NH_4）_2HPO_4为起始原料合成了LaPO_4：Eu〜（3+）微球。系统地研究了样品的形貌，形成机理和发光性能。 X射线衍射（XRD）和红外光谱（1R）表明LaPO_4：Eu〜（3+）微球具有纯单斜相。十六烷基三甲基溴化铵（CTAB）通常在临界胶束浓度以上形成球形胶束，这在LaPO_4：Eu〜（3+）微球的形成中起重要作用。 LaPO_4：Eu〜（3+）微球的激发光谱由几条清晰的线组成，这是由于Eu〜（3+）阳离子从基态直接激发到更高水平的4f流形。由于较低的表面积，微球的发射强度高于不规则颗粒。确定LaPO_4：Eu〜（3+）微球中Eu〜（3+）离子的寿命为2.41 ms。

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《Materials Science and Engineering》 |2013年第11期|807-810|共4页
作者
Yuguo Yang;
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作者单位

New Materials Research Institute of Shandong Academy of Sciences, Jinan 250014, People's Republic of China;

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正文语种 eng
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关键词
LaPO_4:Eu~(3+); Microsphere; Photoluminescence;

机译：LaPO_4：Eu〜（3+）;微球;光致发光;

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Synthesis and luminescent properties of LaPO_4: Eu~(3+) microspheres

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