蓝光LED激发Cr^(3+)掺杂宽带近红外荧光粉研究进展  

Research Progress on Blue LED Excited Cr^(3+) Doped Phosphors with Broad-band Near-infrared Luminescence

作　　者：王长建 乔旭升[1] 樊先平[1] WANG Chang-jian;QIAO Xu-sheng;FAN Xian-ping(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310027

出　　处：《发光学报》2022年第12期1855-1870,共16页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51872255)资助项目。

摘　　要：宽带近红外光源可广泛应用于非侵入式探测、军事侦查、食品检测、医疗成像等领域。采用近红外(NIR)荧光粉和蓝光LED芯片组合成荧光转换发光二级管,作为NIR光源,具有技术成熟、结构紧凑、成本低等优点。本文综述了蓝光LED激发Cr^(3+)掺杂宽带近红外荧光粉研究进展。首先,回顾了Cr^(3+)发光的晶体场理论,并根据材料体系梳理了近来报道的Cr^(3+)掺杂近红外荧光粉;其次,鉴于近红外荧光粉在光谱范围、耐温性、输出功率、电光转化效率等方面依旧存在不足,总结了在机理上优化光谱学性能、改善热猝灭性能和电光转换效率的研究工作;最后,较全面地总结了Cr^(3+)掺杂NIR荧光粉的器件化应用研究进展。Broad-spectrum near-infrared light sources have a wide range of applications in non-invasive detection,military surveillance,food inspection,medical imaging,etc.In practical applications,a near-infrared(NIR)phosphor and a blue LED chip are used to form a fluorescent conversion light-emitting diode.As a NIR light source,it has the advantages of mature technology,compact structure and low cost.In this paper,the research progress of Cr^(3+)doped near-infrared phosphors excited by blue LEDs is reviewed.First,the crystal field theory of Cr^(3+)luminescence is briefly introduced,and the recently reported Cr^(3+)doped near-infrared phosphors are sorted out according to the material system.Secondly,in view of the shortcomings of near-infrared phosphors in terms of spectral range,temperature resistance,output power,electro-optical conversion efficiency,etc.,the existing research work from related mechanisms to optimize spectral performance,improve thermal quenching performance and electro-optical conversion efficiency is summarized.Finally,the researches on the device application of NIR light source are comprehensively summarized and compared.

关 键 词：Cr^(3+)离子 近红外荧光粉 蓝光激发 发光量子效率 电光转化效率 

分 类 号：O482.31[理学—固体物理]