Photoluminescence Characteristics of Ca4LaNbMo4O20∶Pr3+

YU Chun-shan; TIAN Lian-hua

doi:10.3788/fgxb20123305.0499

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Photoluminescence Characteristics of Ca₄LaNbMo₄O₂₀∶Pr³⁺

paper | 更新时间：2020-08-12

- Photoluminescence Characteristics of Ca₄LaNbMo₄O₂₀∶Pr³⁺
- Chinese Journal of Luminescence Vol. 33, Issue 5, Pages: 499-503(2012)
- 作者机构：
  
  延边大学理学院物理系, 吉林延吉 133002
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123305.0499
  CLC： O482.31
- Received：13 February 2012，
  
  Revised：27 March 2012，
  
  Published Online：10 May 2012，
  
  Published：10 May 2012
- 稿件说明：
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俞淳善, 田莲花. Ca4LaNbMo4O20:Pr3+荧光粉的发光性质[J]. 发光学报, 2012,(5): 499-503

YU Chun-shan, TIAN Lian-hua. Photoluminescence Characteristics of Ca4LaNbMo4O20∶Pr3+[J]. Chinese Journal of Luminescence, 2012,(5): 499-503
俞淳善, 田莲花. Ca4LaNbMo4O20:Pr3+荧光粉的发光性质[J]. 发光学报, 2012,(5): 499-503 DOI： 10.3788/fgxb20123305.0499.

YU Chun-shan, TIAN Lian-hua. Photoluminescence Characteristics of Ca4LaNbMo4O20∶Pr3+[J]. Chinese Journal of Luminescence, 2012,(5): 499-503 DOI： 10.3788/fgxb20123305.0499.

摘要

采用高温固相法成功制备出荧光粉Ca

LaNbMo

:Pr

通过X射线衍射分析了样品的结构

其结构与CaMoO

结构相似。在Ca

LaNbMo

:Pr

的激发光谱中出现了NbO

和MoO

的电荷迁移(CTS)吸收和Pr

离子的4f4f5d激发跃迁

以及Pr

-金属离子的价间电荷迁移(IVCT)吸收;另外在420~520 nm处

还观测到属于Pr

离子的典型f-f激发跃迁。发射光谱中

在452 nm激发下

主要出现绿光和红光两种发射

其峰值位于490 nm和607 nm处

分别是Pr

的

和

的跃迁作用;在紫外287 nm激发下出现NbO

和MoO

发射和Pr

离子的4f5d4f跃迁宽带

以及Pr

离子的4f4f发射峰。

Abstract

The phosphor Ca

LaNbMo

∶Pr

has been prepared by the solid-state method. The photoluminescence (PL) properties have been investigated. The XRD patterns are similar to that of CaMoO

structure. The excitation spectrum of Ca

LaNbMo

exhibits a broad absorption band at 257 nm

which is attributed to the charge transfer states (CTS) of MoO

and NbO

complexes. The excitation spectrum of Ca

LaNbMo

∶Pr

shows an absorption band centered at 287 nm

which is attributed to the 4f4f5d transition of Pr

. The excitation spectrum of Ca

LaNbMo

∶Pr

also shows two weak shoulder absorption bands at about 266 and 320 nm

which are originated the charge transfer states (CTS) of MoO

and NbO

complexes and the intervalence charge transfer (IVCT) transition of Pr-metal

respectively. The 4f-4f transitions of Pr

are also observed in the region of 420~520 nm. As a result

it can efficiently convert the blue pump light of the Ⅲ-N semiconductor LED into visible wavelength bands. The photoluminescence spectrum of Ca

LaNbMo

∶Pr

excited with 452 nm shows the green and red emissions originated of the

(490 nm) and

(607 nm) transitions of Pr

ions

respectively. At excited with an ultraviolet wavelength of 287 nm

the emission spectrum of Ca

LaNbMo

∶Pr

exhibits the broad emission band centered at 490 nm and several sharp emission peaks at 490

536

561

607 nm. The broad band is belonging to the overlap of the host emission and the 4f5d4f transition of Pr

ions. The sharp emission peaks are attributed to the

and

transitions of Pr

ions. It is speculated that the energy transfer occurs from the MoO

and NbO

complexes to Pr

ions. However

the efficiency of energy transfer is very weak.

关键词

Keywords

references

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