摘要
近红外荧光粉转换发光二极管(pc-LEDs)具有体积小、效率高等优点,在无损检测和生物成像等领域具有广泛应用前景。本研究通过高温固相法成功合成了Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):Cr^(3+)(CNGG:Cr^(3+))荧光粉,在460 nm蓝光激发下,可以产生650~1000 nm宽带近红外发射,峰值波长为770 nm。对材料的晶体结构和光谱数据进行了系统分析,计算了Cr^(3+)在CNGG基质中的晶体场强度等参数。通过引入Zn^(2+),显著提高了荧光粉的发光热稳定性,并分析了可能的原因。将CNGG∶Cr^(3+)荧光粉与460 nm蓝光芯片结合,封装成近红外pc-LED,并展示了其在夜视和血管成像领域的应用。
Near-infrared phosphor-converted light-emitting diodes(pc-LEDs)are characterized by their compact size and high efficiency,making them a promising solution for various applications in non-destructive testing and biological imaging.In this paper,we successfully synthesized Ca_(3)Nb_(1.6875)Ga_(3.1875)O_(12):Cr^(3+)(CNGG:Cr^(3+))phosphor through the high-temperature solid-state method.This phosphor displays broadband near-infrared emission ranging from 650 nm to 1000 nm,with a peak wavelength of 770 nm when excited by 460 nm blue light.The crystal structure and spectral data of the material were systematically analyzed,and parameters such as the crystal field strength of Cr^(3+)in CNGG matrix were calculated.The thermal stability of phosphorescence was significantly improved by introducing Zn^(2+),and the possible reasons were analyzed.The combination of CNGG∶Cr^(3+)with a blue light chip was encapsulated into a near-infrared pc-LED,leading to its successful application in the realm of biological tissue imaging.
作者
楼哲
何坤
梁思思
刘乐
吴会杰
朱浩淼
LOU Zhe;HE Kun;LIANG Sisi;LIU Le;WU Huijie;ZHU Haomiao(Fujian Key Laboratory of Nanomaterials,CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Research Center of Rare Earth Materials,Haixi Institute,Chinese Academy of Sciences,Xiamen 361021,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2024年第6期932-942,共11页
Chinese Journal of Luminescence
基金
国家重点研发计划项目(2021YFB3500401)
福建省自然科学基金面上项目(2023J01214)
中国科学院海西研究院自主部署项目(CXZX-2022-GH11)。
关键词
近红外荧光粉
宽带发射
近红外荧光粉转换发光二极管
near infrared phosphor
broadband emission
near-infrared phosphor-convered light-emitting diodes(pc-LEDs)
