Structural and optical properties of Er~(3+) doped SiO_2-Al_2O_3-GeO_2 compounds prepared by a simple route

Fausto M. Faria Filho; Rogeria R. Goncalves; Sidney J.L. Ribeiro; Lauro J.Q. Maia

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Structural and optical properties of Er~(3+) doped SiO_2-Al_2O_3-GeO_2 compounds prepared by a simple route

机译：通过简单方法制备的掺Er〜（3+）SiO_2-Al_2O_3-GeO_2化合物的结构和光学性质

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Samples of (1-x)[0.70SiO_2 + 0.30Al_2O_3] +xGeO_2 compositions, containing x=0.05, 0.10, 0.20, 0.30, 0.40 and 0.50, and doped with 1 mol% of Er~(3+), were prepared by a mixed route (sol-gel process and Pechini method). Transparent gels were synthesized and homogeneous powders were obtained by heat treatments from 800 ℃ to 1050 ℃. The final powders were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and high-resolution transmission electron microscopy. The optical properties were studied by photoluminescence measurements in the infrared region, and the average lifetime of the metastable state ~4I_(13/2) of Er~(3+) ions and the full-width at half maximum (FWHM) were determined. A silica-rich amorphous phase and nanocrystallites with orthorhombic structure of Al_6Ge_2O_(13) phase were obtained. The samples present a broad emission centered at around 1532nm under excitation at 977 nm, with a FWHM of 53 nm and a lifetime of 5.6 ms. The synthesized compounds by an easy chemical procedure are potentially applicable in integrated optical systems.

机译：制备样品（1-x）[0.70SiO_2 + 0.30Al_2O_3] + xGeO_2组成的样品，该样品含有x = 0.05、0.10、0.20、0.30、0.40和0.50，并掺有1 mol％的Er〜（3+）。混合路线（溶胶-凝胶工艺和Pechini方法）。合成透明凝胶，并通过在800℃至1050℃之间的热处理获得均匀的粉末。最终的粉末通过X射线衍射，傅立叶变换红外光谱和高分辨率透射电子显微镜进行表征。通过在红外区域的光致发光测量研究了光学性质，确定了Er〜（3+）离子的亚稳态〜4I_（13/2）的平均寿命和半峰全宽（FWHM）。获得了富含二氧化硅的非晶态相和具有Al_6Ge_2O_（13）相正交结构的纳米微晶。样品在977 nm激发下呈现出集中在1532 nm附近的宽发射，FWHM为53 nm，寿命为5.6 ms。通过简单的化学方法合成的化合物可能适用于集成光学系统。

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来源
《Materials Science and Engineering》 |2015年第4期|21-26|共6页
作者
Fausto M. Faria Filho; Rogeria R. Goncalves; Sidney J.L. Ribeiro; Lauro J.Q. Maia;
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作者单位

Instituto de Fisica, Universidade Federal de Goias-UFG, Campus Ⅱ, Caixa Postal 131, CEP 74001-970 Goiania, GO, Brazil;

Departamento de Quimica, Faculdade de Filosofia, Ciencias e Letras de Ribeirao Preto, Universidade de Sao Paulo-USP, Av. Bandeirantes, 3900, CEP 14040-901 Ribeirao Preto, SP, Brazil;

Institute of Chemistry, Sao Paulo State University-UNESP, Rua Francisco Degni, 55, CEP 14801-970 Araraquara, SP, Brazil;

Instituto de Fisica, Universidade Federal de Goias-UFG, Campus Ⅱ, Caixa Postal 131, CEP 74001-970 Goiania, GO, Brazil;

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关键词
SiO_2-Al_2O_3-GeO_2 system; Structural properties; Photoluminescence emission; Low cost process;

机译：SiO_2-Al_2O_3-GeO_2体系;结构性质;光致发光发射;低成本流程;

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Structural and optical properties of Er~(3+) doped SiO_2-Al_2O_3-GeO_2 compounds prepared by a simple route

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