多晶Lu2SiO5：Ce发光粉体中Ce价态的 XANES表征及其VUV光谱特性

范灵聪; 张瑜瑜; 张园; 施鹰; 谢建军; 雷芳

doi:10.3788/fgxb20143509.1027

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多晶Lu₂SiO₅：Ce发光粉体中Ce价态的 XANES表征及其VUV光谱特性

材料合成及性能 | 更新时间：2020-08-12

- 多晶Lu₂SiO₅：Ce发光粉体中Ce价态的 XANES表征及其VUV光谱特性
- XANES Characterization of Ce Valence State in Polycrystalline Lu₂SiO₅：Ce Powders and Its VUV Spectroscopic Properties
- 发光学报 2014年35卷第9期页码：1027-1033
- 作者机构：
  
  上海大学材料科学与工程学院上海,200444
- 作者简介：
- 基金信息：
  
  国家自然科学基金（51172139）资助项目()
- DOI：10.3788/fgxb20143509.1027
  中图分类号： O482.31
- 收稿日期：2014-05-26，
  
  修回日期：2014-06-15，
  
  纸质出版日期：2014-09-03
- 稿件说明：
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范灵聪, 张瑜瑜, 张园等. 多晶Lu2SiO5：Ce发光粉体中Ce价态的 XANES表征及其VUV光谱特性[J]. 发光学报, 2014,35(9): 1027-1033

FAN Ling-cong, ZHANG Yu-yu, ZHNAG Yuan etc. XANES Characterization of Ce Valence State in Polycrystalline Lu2SiO5：Ce Powders and Its VUV Spectroscopic Properties[J]. Chinese Journal of Luminescence, 2014,35(9): 1027-1033
范灵聪, 张瑜瑜, 张园等. 多晶Lu2SiO5：Ce发光粉体中Ce价态的 XANES表征及其VUV光谱特性[J]. 发光学报, 2014,35(9): 1027-1033 DOI： 10.3788/fgxb20143509.1027.

FAN Ling-cong, ZHANG Yu-yu, ZHNAG Yuan etc. XANES Characterization of Ce Valence State in Polycrystalline Lu2SiO5：Ce Powders and Its VUV Spectroscopic Properties[J]. Chinese Journal of Luminescence, 2014,35(9): 1027-1033 DOI： 10.3788/fgxb20143509.1027.

摘要

采用X射线吸收近边结构（XANES）谱对多晶Lu

SiO

：Ce（LSO：Ce）发光粉体中Ce元素的化合价状态进行了表征，结果表明：在空气下煅烧后得到的不同Ce掺杂浓度的LSO：Ce粉体中，Ce

在总掺杂Ce中的含量仅为18%~39%；而经1 000 ℃/2 h的氢气气氛下退火后，LSO：0.5%Ce粉体中Ce

的相对含量由39%大幅提高到83%。真空紫外（VUV）激发发射光谱表明：当Ce的掺杂摩尔分数为0.25%~1%时， Ce

的摩尔分数与LSO：Ce粉体的发光强度具有很好的关联性。氢气退火处理可以使LSO：Ce粉体的发光强度提高近40%。LSO：Ce粉体在变温条件（50~250 K）下的发射强度表现出良好的稳定性，未观察到热猝灭现象发生。

Abstract

The valence state of Ce in the polycrystalline Lu

SiO

:Ce(LSO:Ce) luminescent powders was characterized by X-ray absorption near edge structure (XANES) spectra. The result demonstrates that Ce

contents relative to Ce in the LSO:Ce powders with different Ce-doped concentration are only 18%~39%. Annealed at 1 000 ℃ for 2 h in a flowing hydrogen atmosphere

the relative Ce

content of LSO:0.5%Ce powder increases significantly to 83% from 39%. The emission spectra excited by vacuum ultra violet (VUV) suggest that the luminescence intensity of LSO:Ce with Ce mole fraction from 0.25% to 1% is correlated closely with Ce

content in the powders. The luminescence intensity of LSO:0.5%Ce increases about 40% by annealing in a flowing hydrogen atmosphere. The emission intensity is very stable at different temperatures (50~250 K) without thermal quenching effect observing.

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