溶胶-凝胶法制备BaGd1-xEuxB9O16红色磷光粉的发光

周 岩; 肖林久; 贺明睿; 陈永杰; 谢 颖

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溶胶-凝胶法制备BaGd_1-xEu_xB₉O₁₆红色磷光粉的发光

论文 | 更新时间：2020-08-12

- 溶胶-凝胶法制备BaGd_1-xEu_xB₉O₁₆红色磷光粉的发光
- Structure and Luminescence Properties of BaGdBaGd_1-xEu_xB₉O₁₆ Phosphor Prepared by Sol-gel Method
- 发光学报 2009年30卷第2期页码：189-194
- 作者机构：
  
  1. 沈阳化工学院稀土化学及应用辽宁省高校重点实验室,辽宁沈阳,110142
  2. 东北大学材料冶金学院,辽宁沈阳,110004
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： O482.31
- 纸质出版日期：2009-4-30，
  
  网络出版日期：2009-4-30，
  
  收稿日期：2008-8-25，
  
  修回日期：1900-1-2，
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周岩, 肖林久, 贺明睿, 等. 溶胶-凝胶法制备BaGd_1-xEu_xB₉O₁₆红色磷光粉的发光[J]. 发光学报, 2009,30(2):189-194.

Structure and Luminescence Properties of BaGdBaGd_1-xEu_xB₉O₁₆ Phosphor Prepared by Sol-gel Method[J]. Chinese Journal of Luminescence, 2009,30(2):189-194.
周岩, 肖林久, 贺明睿, 等. 溶胶-凝胶法制备BaGd_1-xEu_xB₉O₁₆红色磷光粉的发光[J]. 发光学报, 2009,30(2):189-194. DOI：

Structure and Luminescence Properties of BaGdBaGd_1-xEu_xB₉O₁₆ Phosphor Prepared by Sol-gel Method[J]. Chinese Journal of Luminescence, 2009,30(2):189-194. DOI：

摘要

采用溶胶-凝胶法制备出BaGd

1-x

红色磷光粉

对过程的物料配比、前驱体处理和晶化温度等制备条件进行了讨论。结果表明

样品在850 ℃下开始晶化

900 ℃时就能够获得较好的晶化产物

结合不同晶化温度下的发光强度比较确定

晶化温度为950 ℃时

BaGd

1-x

磷光粉具有较高的结晶状态和发光强度。当Eu浓度x=0.9时具有最大的发光强度;初始原料配比硼酸须按计量过量15%。所得荧光粉的激发光谱峰值为264

394

465

534 nm等

分别归属于Eu-O电荷迁移带及Eu

的

、

和

跃迁

发射光谱呈Eu

的特征红光

最强的发射峰位于614 nm

归属于

跃迁。进一步研究表明该磷光粉中存在着Gd

对Eu

的能量传递。

Abstract

Rare-earth doped borate phosphor has the advantage of low synthesis temperature

so it is suffered much of recognition in recent decades years. BaLnB9O16 (Ln=La-Lu

Y) is a fine borate host

which can gained different phosphors by doping of different ions (Ce

Mn). For the before time investigation of borate phosphor

solid-state method was used for preparing

the fabrication temperature is about 1 000 ℃

and more the phenomenon of agglomeration is very grave. We synthesized a Eu3+ doped boron-containing phosphor having a formula of BaGd1-xEu<em>xB9O16 by sol-gel method

decreasing the crystallized temperature and avoiding the grave agglomeration. Using Eu2O3

Gd2O3

boracic acid

barium carbonate acid as starting materials and citric acid as complexing agent

sol-gel method was used to prepare BaGd1-xEuxB9O16 red phosphor. The influence of preparing condition was discussed

and their structure and luminescence property were characterized by X-ray diffraction (XRD) analysis and fluorescence spectrometry. The investigation showed that the sample can be crystallized under 850 ℃

and gained better crystallized production at 900 ℃. Considering to the luminescence intensity for the samples prepared at different crystallization temperature

BaGd1-xEuxB9O16 phosphor can get better luminescence intensity and better purity.The investigation showed that there is huge quenching concentration of Eu3+ in BaGd1-xEuxB9O16. Its about 90%. For the borate synthesis

boracic acid can be volatilization at high temperature

so 15% excessive boracic was necessary. The investigation found that the phosphor can be excitated by 264

394

465

534 nm; they are assigned to Eu—O energy transfer

7F0→5L6

7F0-5D2

7F0-5D1 transitions

respectively. The samples can emit out characteristic red light of Eu3+ with the main peak of 614 nm

which is assigned to 5D0-7F2 transition. The energy transfer between Gd3+ and Eu3+ exist in this phosphor. Different from the phosphors prepared by solid-state method

the highest excitation position is not from energy transfer

it comes from f-f transition which located at 394 nm. Thats suitable to white LED that can give the excitation of purple ray.

关键词

红色荧光粉硼酸盐溶胶-凝胶方法

Keywords

red phosphorsboratesol-gel method

references

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