Strong broad green UV-excited photoluminescence in rare earth (RE = Ce, Eu, Dy, Er, Yb) doped barium zirconate

R. Borja-Urby; LA. Diaz-Torres; P. Salas; C. Angeles-Chavez; O. Meza

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Strong broad green UV-excited photoluminescence in rare earth (RE = Ce, Eu, Dy, Er, Yb) doped barium zirconate

机译：稀土（稀土= Ce，Eu，Dy，Er，Yb）掺杂的锆酸钡发出的强烈的绿色紫外激发光致发光

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The wet synthesis hydrothermal method at 100 C was used to elaborate barium zirconate (BaZrO_3) unpurified with 0.5 mol% of different rare earth ions (RE = Yb, Er, Dy, Eu, Ce). Morphological, structural and UV-photoluminescence properties depend on the substituted rare earth ionic radii. While the crystalline structure of RE doped BaZrO_3 remains as a cubic perovskite for all substituted RE ions, its band gap changes between 4.65 and 4.93 eV. Under 267 nm excitation the intrinsic green photoluminescence of the as synthesized BaZrCh: RE samples is considerably improved by the substitution on RE ions. For 1000 C annealed samples, under 267 nm, the photoluminescence is dominated by the intrinsic BZO emission. It is interesting to notice that Dy~(3+), Er~(3*) and Yb~(3+) doped samples present whitish emissions that might be useful for white light generation under 267 nm excitation. C1E color coordinates are reported for all samples.

机译：使用100℃下的湿法合成水热法精制未经0.5摩尔％的不同稀土离子（RE = Yb，Er，Dy，Eu，Ce）纯化的锆酸钡（BaZrO_3）。形态，结构和紫外光致发光特性取决于取代的稀土离子半径。 RE掺杂的BaZrO_3的晶体结构对于所有取代的RE离子仍然是立方钙钛矿，但其带隙在4.65和4.93 eV之间变化。在267 nm激发下，合成的BaZrCh：RE样品的固有绿色光致发光通过在RE离子上的取代得到了显着改善。对于1000 C退火的样品，在267 nm以下，光致发光主要由固有的BZO发射决定。有趣的是，Dy〜（3 +），Er〜（3 *）和Yb〜（3+）掺杂的样品呈现发白光，这可能对在267 nm激发下产生白光有用。报告所有样品的C1E颜色坐标。

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来源
《Materials Science and Engineering》 |2011年第17期|p.1388-1392|共5页
作者
R. Borja-Urby; LA. Diaz-Torres; P. Salas; C. Angeles-Chavez; O. Meza;
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作者单位

Grupo de Espectroscopia de Materiales Avanzadosy Nanoestructurados (EMANA), Centra de Investigations en Optica A. C. Leon, Gto. 37150 Mexico;

Grupo de Espectroscopia de Materiales Avanzadosy Nanoestructurados (EMANA), Centra de Investigations en Optica A. C. Leon, Gto. 37150 Mexico;

Centro de Fisica Aplicada y Tecnologia Avanzada, Universidad National Autonoma de Mexico, A.P. 1-1010, Queretaro, Qro. 76000, Mexico;

Institute Mexicano del Petroleo, Ciudad de Mexico, D. F. 07730, Mexico;

Grupo de Espectroscopia de Materiales Avanzadosy Nanoestructurados (EMANA), Centra de Investigations en Optica A. C. Leon, Gto. 37150 Mexico;

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正文语种 eng
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barium zirconate; photoluminescence; nanocrystals; rare earths;

机译：锆酸钡;光致发光;纳米晶体;稀土;

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Strong broad green UV-excited photoluminescence in rare earth (RE = Ce, Eu, Dy, Er, Yb) doped barium zirconate

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