Photoluminescence Properties and Device Performance of Cr3+,Yb3+ Co-doped LaSc3(BO3)4 Near Infrared Phosphors

Jin-min WU; De-cai HUANG; Si-si LIANG; Shou-liang XU; Hao-miao ZHU

doi:10.37188/CJL.20210066

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Photoluminescence Properties and Device Performance of Cr³⁺,Yb³⁺ Co-doped LaSc₃(BO₃)₄ Near Infrared Phosphors

Synthesis and Properties of Materials | 更新时间：2021-06-18

- Photoluminescence Properties and Device Performance of Cr³⁺,Yb³⁺ Co-doped LaSc₃(BO₃)₄ Near Infrared Phosphors
- Chinese Journal of Luminescence Vol. 42, Issue 6, Pages: 793-803(2021)
- 作者机构：
  
  1.福建农林大学材料工程学院, 福建福州　 350002
  2.中国科学院福建物质结构研究所中国科学院功能纳米结构设计与组装重点实验室，福建省纳米材料重点实验室, 福建福州　 350002
  3.中国科学院海西研究院厦门稀土材料研究所，厦门市稀土光电功能材料重点实验室, 福建厦门　 361021
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(11904363)
- DOI：10.37188/CJL.20210066
  CLC： O482.31
- Published：01 June 2021，
  
  Received：19 February 2021，
  
  Revised：05 March 2021，
- 稿件说明：
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JIN-MIN WU, DE-CAI HUANG, SI-SI LIANG, et al. Photoluminescence Properties and Device Performance of Cr³⁺,Yb³⁺ Co-doped LaSc₃(BO₃)₄ Near Infrared Phosphors. [J]. Chinese journal of luminescence, 2021, 42(6): 793-803.
DOI：

JIN-MIN WU, DE-CAI HUANG, SI-SI LIANG, et al. Photoluminescence Properties and Device Performance of Cr³⁺,Yb³⁺ Co-doped LaSc₃(BO₃)₄ Near Infrared Phosphors. [J]. Chinese journal of luminescence, 2021, 42(6): 793-803. DOI： 10.37188/CJL.20210066.

摘要

荧光粉转换型宽带发射近红外LED在食品检测、生物医药、安防监控等领域具有重要的应用价值。本工作介绍了一种具有宽带近红外发射的LaSc

(BO

)

∶Cr

(LSB∶Cr

)荧光粉，在460 nm蓝光激发下，其发射覆盖650~1 200 nm范围，半高宽达到170 nm。在此基础上，通过Yb

共掺，有效提升了其发光性能，其中发射峰半高宽拓宽到223 nm，最高发光量子产率由14%提升至35%，发光热稳定性也得到显著提高。基于荧光粉的发光量子产率、荧光寿命和发光热稳定性等数据分析，发现Yb

共掺杂对材料发光热稳定性的改善主要源于Cr

与Yb

之间的高效能量传递，并且Yb

在基质材料中表现出更好的热稳定性。最后，将LSB∶Cr

荧光粉与蓝光LED芯片结合，制备成近红外LED器件，在60 mA驱动电流下，近红外输出功率达16 mW。以上结果表明，LSB∶Cr

荧光粉是一种潜在的近红外LED用发光材料。

Abstract

Near-infrared phosphor-converted LEDs(NIR pc-LEDs)play an important role in the applications of food analysis

biomedicine

security monitoring

etc

. In this study

a broadband near-infrared phosphor LaSc

(BO

)

∶Cr

(LSB∶Cr

) is presented. Under 460 nm excitation

the emission band of LSB∶Cr

covers the spectral range of 650-1 200 nm with a full width at half maximum (FWHM) of 170 nm. Furthermore

the performance of LSB∶Cr

phosphor is improved by Yb

co-doping

leading to the broadened FWHM(up to 223 nm)

increased photoluminescence quantum yield(PL QY

from 14% to 35%) and reduced PL thermal quenching. Based on the analysis of PL spectrum

PL QYs

PL decay curves and PL thermal stability

it is revealed that the improvement of PL thermal stability by Yb

co-doping principally originates from the efficient energy transfer from Cr

to more thermally stable Yb

emitters. Finally

a NIR pc-LED is fabricated by combining the LSB∶Cr

phosphor with blue LED chip

which exhibits a maximum NIR output power of 16 mW at 60 mA drive current. These results suggest that LSB∶Cr

phosphor is a promising luminescent converter for broadband NIR pc-LED.

关键词

近红外荧光粉Cr3+/Yb3+共掺杂能量传递近红外荧光粉转换发光二极管

Keywords

near-infrared phosphorCr3+/Yb3+ co-dopingenergy transfernear-infrared phosphor-converted LED(NIR pc-LED)

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Related Author

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Related Institution

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College of Bioresources Chemical and Materials Engineering， Shaanxi University of Science and Technology

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