Eu-掺杂CeB6纳米晶的合成与光吸收研究

doi:10.15541/jim20150208

摘要/Abstract

摘要：

采用固相反应法成功地将Eu元素掺入CeB₆纳米晶中, 并系统地研究了对其光吸收性能的影响规律。由XRD分析、扫描电镜和透射电镜能谱分析结果充分证明了Eu元素成功地掺入了CeB₆晶格中。光吸收结果表明, 随着Eu掺杂量的增加, CeB₆吸收峰波长从938 nm增加至1718 nm, 产生了“红移”现象。与此同时, 透射光波长也从可见光区域的798 nm 红移至近红外区域的1138 nm。本文揭示了通过Eu掺杂可使CeB₆透射光波长和吸收峰波长连续可调。这一特性对于拓展CeB₆的光学应用具有重要意义。

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关键词: 稀土硼化物, 纳米晶, 光吸收

Abstract:

The Eu-doped CeB₆ nanocrystalline was successfully synthesized by a solid-state reaction and their optical properties were investigated. The XRD and EDS analyses fully confirm that the Eu element has been successfully doped into the lattice of CeB₆. The optical absorption results show that maximum absorption red-shifted from 938 nm to 1718 nm. Meanwhile, it is interestingly found that the maximum transmission also red-shifts from visible region of 798 nm to near-infrared region of 1138 nm, which is for the first time to be obtained tunable optical characteristic CeB₆ by Eu doping. Thus, these interesting findings on CeB₆ nanocrystalline can extend its optical application.

Key words: rare-earth hexaboride, nanocrystalline, optical absorption

中图分类号:

TB34

包黎红, 明明, 特古斯. Eu-掺杂CeB₆纳米晶的合成与光吸收研究[J]. 无机材料学报, 2015, 30(10): 1110-1114.

BAO Li-Hong, MING Ming, O.Tegus. Synthesis and Optical Absorption of Eu-doped CeB₆ Nanocrystalline[J]. Journal of Inorganic Materials, 2015, 30(10): 1110-1114.

图/表 5

Fig. 1 XRD patterns of EuxCe1-xB6 nanocrystalline powder

Fig. 2 FESEM images of EuxCe1-xB6 nanocrystalline with different doping content. (a) x=0.2; (b) x=0.4; (c) x=0.6

Fig. 3 EDS analysis for Eu0.4Ce0.6B6 nanocrystalline mapping (a) and element spectrum (b)

Fig. 4 (a) TEM analyses of Eu0.4Ce0.6B6 nanocrystalline, the HRTEM image with indexing FFT patterns (top right), and (b) the corresponding element spectrum

Fig. 5 Optical absorption spectrum of EuxCe1-xB6 dispersions

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Eu-掺杂CeB₆纳米晶的合成与光吸收研究

Synthesis and Optical Absorption of Eu-doped CeB₆ Nanocrystalline

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