Multi-color luminescence of uniform CdWO4 nanorods through Eu3+ ion doping
Multi-color luminescence of uniform CdWO4 nanorods through Eu3+ ion doping
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DOI：
10.1039/c4tc02409e
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发表时间：
2015-03
影响因子：
6.4
通讯作者：
Dan Yue;Qing-Feng Li;W. Lu;Qi Wang;Mengnan Wang;Chunyang Li;Lin Jin;Yurong Shi;Zhenling Wang;J. Hao
中科院分区：
文献类型：
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作者：
Dan Yue;Qing-Feng Li;W. Lu;Qi Wang;Mengnan Wang;Chunyang Li;Lin Jin;Yurong Shi;Zhenling Wang;J. Hao
通过简单的水热法制备了均匀的 Eu3+ 掺杂 CdWO4 纳米棒，并通过 X 射线衍射、透射电子显微镜、光致发光 (PL) 光谱和 PL 寿命测量进行了表征。结果表明，所得Eu3+掺杂CdWO4纳米棒具有单斜相结构，且Eu3+掺杂浓度为0.4%~4.0%时，该相结构能够保持。随着掺杂浓度的增加，纳米棒的直径从27 nm减小到15 nm，并且当Eu3+掺杂浓度为6.5%时，形貌变得不规则。在紫外光的激发下，WO42−的蓝绿光发射和Eu3+的红光发射的相对强度可以通过将Eu3+离子掺杂到CdWO4纳米棒中来调节，从而改变WO42−和Eu3+之间的能量转移。因此，只需改变Eu3+的掺杂浓度即可实现同一主体在单一激发波长下的多色发光。这些发光纳米材料可能在显示器、光源、生物成像等方面具有潜在的应用。
Uniform Eu3+ doped CdWO4 nanorods were prepared via a simple hydrothermal method and characterized by X-ray diffraction, transmission electron microscopy, photoluminescence (PL) spectroscopy and PL lifetime measurements. The results indicate that the obtained Eu3+ doped CdWO4 nanorods have monoclinic phase structure, and the phase structure can be retained at Eu3+ doping concentrations of 0.4–4.0%. The diameter of nanorods decreases from 27 to 15 nm with an increase in the doping concentrations, and the morphology becomes irregular at the Eu3+ doping concentration of 6.5%. Under the excitation of ultraviolet light, the relative intensities of blue-green emission ascribed to WO42− and red emission from Eu3+ can be tuned through doping Eu3+ ions into the CdWO4 nanorods and thus altering the energy transfer between WO42− and Eu3+. Hence, the multi-color luminescence in the same host at a single excited wavelength can be realized simply by altering the doping concentration of Eu3+. These luminescent nanomaterials may have potential applications in displays, light sources, bio-imaging and so on.