Luminescence Properties of YAG：Ce Co-doped with Pr3+ or Sm3+

KONG Li; GAN Shu-cai; HONG Guang-yan; ZHANG Ji-lin

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Luminescence Properties of YAG：Ce Co-doped with Pr³⁺ or Sm³⁺

更新时间：2020-08-11

- Luminescence Properties of YAG：Ce Co-doped with Pr³⁺ or Sm³⁺
- Chinese Journal of Luminescence Vol. 28, Issue 3, Pages: 393-396(2007)
- 作者机构：
  
  1. 中国科学院长春应用化学研究所, 稀土化学与物理开放实验室,吉林长春,130022
  2. 吉林大学, 化学学院,吉林长春,130023
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Published：20 May 2007，
  
  Received：26 October 2006，
  
  Revised：10 December 2006，
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孔丽, 甘树才, 洪广言, 张吉林. Pr3+或Sm3+掺杂YAG：Ce的发光特性及其荧光寿命[J]. 发光学报, 2007,28(3): 393-396

KONG Li, GAN Shu-cai, HONG Guang-yan, ZHANG Ji-lin. Luminescence Properties of YAG：Ce Co-doped with Pr3+ or Sm3+[J]. Chinese Journal of Luminescence, 2007,28(3): 393-396
孔丽, 甘树才, 洪广言, 张吉林. Pr3+或Sm3+掺杂YAG：Ce的发光特性及其荧光寿命[J]. 发光学报, 2007,28(3): 393-396 DOI：

KONG Li, GAN Shu-cai, HONG Guang-yan, ZHANG Ji-lin. Luminescence Properties of YAG：Ce Co-doped with Pr3+ or Sm3+[J]. Chinese Journal of Luminescence, 2007,28(3): 393-396 DOI：

摘要

研究了Pr

掺杂对YAG:Ce发射光谱及其荧光寿命的影响.观察到当掺杂Pr

时

在609nm处出现Pr

的发射峰

而掺杂Sm

时

在616nm处呈现Sm

的发射峰.掺杂Pr

或Sm

增加红光区的发射峰将有利于提高YAG:Ce荧光粉的显色性.实验中测定了(Y

0.95

0.01

0.04

)

、(Y

0.95

0.01

0.04

)

、(Y

0.96

0.04

)

的荧光寿命()

观察到在YAG:Ce中掺入Pr

或Sm

使Ce

的荧光寿命减小.实验结果表明

少量掺杂Pr

或Sm

并未引起基质的结构的变化.

Abstract

Due to a lot of advantages

such as energy saving

high efficiency and long lifetime

white light emitting diode (W-LED) has been widely applied in many areas. The common way to fabricate W-LED is by painting a yellow-emitting phosphor on the blue LED chip. Since blue LED emits from 430nm to 480nm

the absorption energy for a better yellow-emitting phosphor should match that spectral region of LED emission. YAG:Ce

shows a strong broad band absorption around 465nm and emits at about 540nm; therefore it has been used as the main yellow-emitting phosphor in W-LED. However

the weakness of W-LED composed of blue LED and YAG:Ce

is the shortage of its red-emission component. To overcome this weakness

one of the following approaches could be chosen: 1.Adding some red-emitting components into YAG:Ce

phosphor; 2.Doping other cations in YAG:Ce

lattice. Lanthanide ions are the appropriate ones for this doping YAG:Ce

since their ionic radii are very close to that of Y

ion. Many papers have reported the study on lanthanide doping. In this paper

the doping effects of Pr

and Sm

on the luminescence properties and fluorescence lifetime of YAG:Ce were systematically studied in order to understand the rule. Phosphors were synthesized by high-temperature solid-state reaction under reducing atmosphere. The X-ray diffraction patterns presented Pr

and Sm

can partially replace Y

and the lattice phases do not change. The doping effects of Pr

and Sm

on the luminescence properties and fluorescence lifetimes of (Y

0.96-x

0.04

)

(Ln= Pr

) were studied. The emission and excitation spectra of the samples are recorded. In the (Y

0.96-x

0.04

)

system the emission band of Pr

was at about 609nm; and in the (Y0.96-xSmxCe0.04)3Al5O12 system the emission band of Sm

was at about 616nm. So it can increase the color rendering index (CRI) of YAG:Ce phosphors doped by Pr

or Sm

. Fluorescence lifetimes of the Ce

in (Y

0.95

0.01

0.04

)

0.95

0.01

0.04

)

0.96

0.04

)

are measured. The lifetime decreased due to the doping of Pr

or Sm

in YAG:Ce

关键词

白光LEDYAG:Ce发射光谱掺杂

Keywords

W-LEDsYAG：Ceemission spectradoping

references

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