Zn2+共掺提高Cr3+掺杂钙铌镓石榴石热稳定性OA北大核心CSTPCD
Improving Thermal Stability of Cr3+Doped Calcium Niobium Gallium Garnet Through Zn2+Codoping
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Ca3Nb1.6875Ga3.1875O12:Cr3+(CNGG:Cr3+)荧光粉,在460 nm蓝光激发下,可以产生650～1 000 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Cr3+在CNGG基质中的晶体场强度等参数.通过引入Zn2+,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:Cr3+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 Ca3Nb1.6875Ga3.1875O12:Cr3+phosphor through the high-temperature solid-state method.This phosphor displays broadband near-infrared emission ranging from 650 nm to 1 000 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 Cr3+in CNGG matrix were calculated.The thermal stability of phosphorescence was significantly improved by introducing Zn2+,and the possible reasons were analyzed.The combination of CNGG:Cr3+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.
楼哲;何坤;梁思思;刘乐;吴会杰;朱浩淼
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||福建师范大学 化学与材料学院,福建 福州 350007||中国科学院海西研究院 厦门稀土材料研究中心,厦门市稀土光电功能材料重点实验室,福建 厦门 361021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||中国科学院海西研究院 厦门稀土材料研究中心,厦门市稀土光电功能材料重点实验室,福建 厦门 361021
物理学
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 phosphorbroadband emissionnear-infrared phosphor-convered light-emitting diodes(pc-LEDs)
《发光学报》 2024 (006)
932-942 / 11
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)Supported by National Key R&D Program of China(2021YFB3500401);Natural Science Foundation of Fujian Province(2023J01214);Autonomous Deployment Project of Haixi Institute,CAS(CXZX-2022-GH11)
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