CaLaAl3O7∶Eu3+的凝胶-燃烧法合成及其发光性能

doi:10.3964/j.issn.1000-0593(2008)12-2781-04

摘要
参考文献
相关文章 (15)

全文: PDF (1077 KB)
输出: BibTeX | EndNote (RIS)

摘要：采用柠檬酸凝胶-燃烧法合成了CaLa_1-xAl₃O₇∶xEu³⁺(0.05≤x≤0.8)材料的前驱粉末，在低于700 ℃退火处理时，得到非晶态样品，而高于800 ℃退火处理后为纯相的CaLa_1-xAl₃O₇∶xEu³⁺粉末样品。通过激发光谱和发射光谱研究了Eu³⁺在CaLaAl₃O₇基质中的发光性能及Eu³⁺掺杂量，退火温度和柠檬酸与金属离子的配比等对发光强度的影响。结果显示，非晶态和晶态CaLa_1-xAl₃O₇∶xEu³⁺样品均可发光，非晶态样品的最强激发峰出现在⁷F₀—⁵D₂的465 nm处，而晶相样品的最强激发峰为⁷F₀—⁵L₆跃迁的394 nm。非晶态粉末在465 nm激发下发射光谱由⁵D₀—⁷F₀的578 nm和⁵D₀—⁷F₁的587 nm及⁵D₀—⁷F₂的615 nm组成。而晶态粉末在394 nm激发下的发射光谱与非晶态相比⁵D₀—⁷F₀跃迁消失了，同时⁵D₀—⁷F₁跃迁发生谱线劈裂，出现在587和596 nm两处。随着退火温度的升高，主峰615 nm强度增强了，但⁵D₀—⁷F₁跃迁峰的增强更加明显。

关键词：CaLaAl₃O₇∶Eu³⁺;凝胶-燃烧法;发光性能

Abstract：Using the gel-combustion method the precursors of CaLa_1-xAl₃O₇∶xEu³⁺(0.05≤x≤0.8) were prepared. When annealing temperature was below 700 ℃, the materials were in amorphous state, while as annealing temperature was above 800 ℃, the high purity CaLa_1-xAl₃O₇∶xEu³⁺ crystalline materials were obtained. The luminescence properties of CaLa_1-xAl₃O₇∶xEu³⁺ both in amorphous and crystalline phases were investigated, and the results of excitation spectrum show a similar charge transition band of Eu³⁺—O^2- between 230 nm and 320 nm and a series of f—f transition of Eu³⁺ ion. However, the strongest band of amorphous material was at 465 nm corresponding to ⁷F₀—⁵D₂ transition, and those of the crystalline materials were at 394 nm corresponding to ⁷F₀—⁵L₆ transition of Eu³⁺ ion. In amorphous state materials the emission intensity of excitation wavelength 465 nm was stronger than that of 394 nm, and composition of ⁵D₀—⁷F₀ transition at 578 nm, ⁵D₀—⁷F₁ transition at 587 nm and ⁵D₀—⁷F₂ transition at 615 nm. In crystalline material, the emission intensity of excitation wavelength of 394 nm was stronger than that of 465 nm, the ⁵D₀—⁷F₀ transition disappeared, and the ⁵D₀—⁷F₁ transition split into 587 nm and 596 nm. With the increase in temperature, the strongest band at 615 nm increased, and what is more, the ⁵D₀—⁷F₁ transition increased remarkably. In CaLa_1-xAl₃O₇∶xEu³⁺, when x=0.2 for the co-doping Eu³⁺ ion and the mol proportion of citric acid and metal ion (C/M) was 1.2, the luminescence intensity was the highest.

Key words：CaLaAl₃O₇∶ Eu³⁺;Gel-combustion method;Luminescence properties

收稿日期: 2007-05-10 修订日期: 2007-08-20

中图分类号:

TG146.4

通讯作者: 莎仁 E-mail: sr@imnu.edu.cn

引用本文:

莎仁,王喜贵,吴红英,李霞. CaLaAl₃O₇∶Eu³⁺的凝胶-燃烧法合成及其发光性能 [J]. 光谱学与光谱分析, 2008, 28(12): 2781-2784.
SHA Ren, WANG Xi-gui, WU Hong-ying, LI Xia. Synthesis of CaLaAl₃O₇∶Eu³⁺ by Gel-Combustion Method and Its Luminescence Properties. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(12): 2781-2784.

链接本文:

https://www.gpxygpfx.com/CN/10.3964/j.issn.1000-0593(2008)12-2781-04 或 https://www.gpxygpfx.com/CN/Y2008/V28/I12/2781

[1] Song H W, Chen B J, Peng H S. Appl. Phys. Lett., 2002，81：1776.
[2] Dorenbos P. J. Lumin., 2005，111：89.
[3] YU Hua，SUN Jian，LIU Bao-rong，et al(余华，孙健，刘宝荣, 等). Acta Phys. Sin.(物理学报)，2006，55(11)：6152.
[4] Lammers M J J, Blasse G. Mater. Chem. Phys.，1986，15：537.
[5] Ryba-Romanowski W. Golab S, Pisarski W A. Spectrochimica Acta Pt. A，1998, 54：2071.
[6] Shun-ichi K, Makoto I, Hisanori Y. J. Alloys Comp .，1999，283：95.
[7] Park J C, Moon H K, Kim D K, et al. Appl. Phys. Lett.，2000，77: 2162.
[8] WANG Xi-gui，WU Hong-ying，XIE Da-tao，et al(王喜贵，吴红英，谢大, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2002, 22(2)：270.
[9] GU Mu，QIU Long-qing，LIU Xiao-lin，et al(顾牡，邱隆清，刘小林，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005, 25(8)：1190.
[10] WANG Xi-gui，WU Hong-ying，WENG Shi-fu，et al(王喜贵，吴红英，翁诗甫，等). Acta Phys.-Chim. Sin.(物理化学学报)，2003，19(5): 398.
[11] CHANG Jian-jun，HUANG Shi-hua，PENG Hong-shang，et al(常建军，黄世华，彭洪尚, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2006, 26(2): 231.
[12] PENG Zhi-wei，WANG Ling-ling，LIU Huang-qing，et al(彭智伟，王玲玲，刘晃清, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2007, 27(3)：427.
[13] Phan T L，Phan M H，et al. Physica States Solid A，2004，201(9)：2170.
[14] YAO Jiang，SUN Ling-dong，QIAN Cheng，et al(姚疆，孙伶东，钱程，等). Chinese J. of Rare Earth Soc.(中国稀土学报)，2001，19(5)：426.
[15] WANG De-yin，WANG Yu-hua(王得印，王育华). Rare Metal Materials and Engineering(稀有金属材料与工程)，2006，35(12)：1936.
[16] WANG Ji-ye，SHI Shi-kao(王继业，石士考). J. Inorg. Mater.(无机材料学报)，2003，18(1): 246.