Excitation Spectrum Properties of GdVO4：Eu3+

ZHANG Qing-li; GUO Chang-xin; SHI Chao-shu

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Excitation Spectrum Properties of GdVO₄：Eu³⁺

更新时间：2020-08-11

- Excitation Spectrum Properties of GdVO₄：Eu³⁺
- Chinese Journal of Luminescence Vol. 21, Issue 4, Pages: 353-358(2000)
- 作者机构：
  
  中国科学技术大学物理系
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：15 October 1999，
  
  Revised：2000-7-11，
  
  Published：30 November 2000
- 稿件说明：
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张庆礼, 郭常新, 施朝淑. GdVO4：Eu3+的激发光谱特性研究[J]. 发光学报, 2000,21(4): 353-358

ZHANG Qing-li, GUO Chang-xin, SHI Chao-shu. Excitation Spectrum Properties of GdVO4：Eu3+[J]. Chinese Journal of Luminescence, 2000,21(4): 353-358
张庆礼, 郭常新, 施朝淑. GdVO4：Eu3+的激发光谱特性研究[J]. 发光学报, 2000,21(4): 353-358 DOI：

ZHANG Qing-li, GUO Chang-xin, SHI Chao-shu. Excitation Spectrum Properties of GdVO4：Eu3+[J]. Chinese Journal of Luminescence, 2000,21(4): 353-358 DOI：

摘要

测量了GdVO

:Eu

在室温下的光致发光光谱;研究了不同掺杂方式和烧结气氛对多晶GdVO

:Eu

发光性质的影响

探讨了GdVO

:Eu

的激发光谱在200～350nm范围内激发带的来源和GdVO

:Eu

中的能量传递。在200～350nm范围内的激发带可解释为来自于钒酸根团的配体O到V的电荷迁移跃迁吸收;硝酸溶液使部分正GdVO

形成多钒酸盐

还原气氛使GdVO

产生O空位和部分V变价

影响了钒酸根团间的电荷迁移跃迁吸收和钒酸根团间、钒酸根团与Eu

间的能量传递

产生激发谱带蓝移和激发带间强度比例变化。GdVO

中VO

的轨道能使得VO

和稀土离子(Gd

、Eu

)的电子波函数有效地重叠

从而VO

和稀土离子可通过交换作用有效地传递能量。GdVO

:Eu

在200nm处的吸收很弱

在此位置也没有Gd

或Eu

的4f

-1

5d的吸收和明显的4f

高能级吸收

而激发却十分有效

可解释为由于存在VO

与Gd

或Eu

的4f

高能级间有效的能量传递所致;由于Gd

的特征发射恰好在基质的强激发带

且Gd

的特征发射没有出现

可存在Gd

的能量传递。Gd

的

、

能级间隔与Eu

的

、

能级间隔相近

处于

态的Gd

可通过共振能量传递激发Eu

到

态

这可导致Gd

离子的能量传递。

Abstract

The excitation and diffusion reflection spectra of GdVO

:Eu

were measured at room temperature. The influences of the doping method and sintering atmosphere on the excitation spectrum of GdVO

:Eu

were studied. The blue shift and intensity proportion change of the excitation bands

which are due to the effects of acid and deduced sintering atmosphere

are interpreted

the source of the bands at 200～350nm and the possible energy transfer of GdVO

:Eu

were discussed. The polycrystalline GdVO

:Eu

was prepared by the high-temperature solid reaction. Using X-ray diffraction (XRD) data

the lattice parameters

=7.22 and

=6.38 were calculated by the least square method

calculation gives the estimation density

of XRD and

=5.34 (g/cm

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