Preparation and Characterization of Ca1-x-yWO4∶xPr3+,yLi+ Deep Red Phosphors for White LEDs Excited by Blue Light

PU Yong; ZHU Da-chuan; HAN Tao

doi:10.3788/fgxb20123301.0012

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Preparation and Characterization of Ca_1-x-yWO₄∶xPr³⁺,yLi⁺ Deep Red Phosphors for White LEDs Excited by Blue Light

paper | 更新时间：2020-08-12

- Preparation and Characterization of Ca_1-x-yWO₄∶xPr³⁺,yLi⁺ Deep Red Phosphors for White LEDs Excited by Blue Light
- Chinese Journal of Luminescence Vol. 33, Issue 1, Pages: 12-16(2012)
- 作者机构：
  
  1. 四川大学材料科学与工程学院, 四川成都 610065
  2. 重庆文理学院材料交叉学科研究中心重庆市高校微纳米材料工程与技术重点实验室, 重庆 402168
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123301.0012
  CLC： O482.31
- Received：30 August 2011，
  
  Revised：27 October 2011，
  
  Published Online：10 January 2012，
  
  Published：10 January 2012
- 稿件说明：
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蒲勇, 朱达川, 韩涛. 蓝光激发白光LED用深红色荧光粉 Ca1-x-yWO4∶xPr3+, yLi+的制备与表征[J]. 发光学报, 2012,33(1): 12-16

PU Yong, ZHU Da-chuan, HAN Tao. Preparation and Characterization of Ca1-x-yWO4∶xPr3+,yLi+ Deep Red Phosphors for White LEDs Excited by Blue Light[J]. 发光学报, 2012,33(1): 12-16
蒲勇, 朱达川, 韩涛. 蓝光激发白光LED用深红色荧光粉 Ca1-x-yWO4∶xPr3+, yLi+的制备与表征[J]. 发光学报, 2012,33(1): 12-16 DOI： 10.3788/fgxb20123301.0012.

PU Yong, ZHU Da-chuan, HAN Tao. Preparation and Characterization of Ca1-x-yWO4∶xPr3+,yLi+ Deep Red Phosphors for White LEDs Excited by Blue Light[J]. 发光学报, 2012,33(1): 12-16 DOI： 10.3788/fgxb20123301.0012.

摘要

用高温固相法合成了用于白光LED的Ca

x-y

∶

红色荧光粉。用XRD、SEM和荧光分光光度计

对试样的晶体结构、表面形貌和发光性能进行表征。所合成的样品为四方晶系。经预先球磨的样品颗粒比较均匀

粒径较小。荧光粉的激发峰位于440~500 nm的宽带内

主要发射峰位于602

620

651 nm

对应于Pr

的

、

和

特征跃迁发射

651 nm处的强度最大。同时还研究了Pr

、Li

的掺杂浓度以及助熔剂的加入对样品性能的影响。实验结果表明

所合成的Ca

x-y

∶

是可用于蓝光芯片激发的白光LED用红色荧光粉。

Abstract

A series of Ca

x-y

∶

deep red phosphors have been synthesized for white LEDs by high temperature solid state reaction. The crystal structure

surface morphology and spectral characteristics of the samples were investigated by the use of X-ray diffraction (XRD)

SEM and fluorescence spectrophotometer. It is found that the synthesized crystalline powders are tetragonal system CaWO

. The particle size of pre-milling sample is more uniform and smaller than the manual grinded sample. The excitation-peaks are between 440 and 500 nm

and the main emission-peaks are located at 602

620

651 nm (Pr

ion of

transition). The peak at 651 nm has the strongest relative luminous intensity. The effects of doping density of Pr

calcining temperature and the addition of flux on the characteristics of luminescence have also been investigated. It shows that the Ca

x-y

∶

can be used as red phosphors for blue light chips based white LEDs.

关键词

Keywords

references

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