化学学报 ›› 2022, Vol. 80 ›› Issue (4): 453-459.DOI: 10.6023/A21120598 上一篇    下一篇

所属专题: 中国科学院青年创新促进会合辑

研究论文

In2BP3O12:Cr3+宽带近红外荧光粉的发光性能及应用研究

张景荣a,b,c, 黄得财b,c,*(), 黄聪聪b,c, 梁思思b,c, 朱浩淼a,b,c,d,*()   

  1. a 福建师范大学 化学与材料学院 福州 350003
    b 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 福州 350002
    c 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 厦门 361021
    d 中国科学院 赣江创新研究院 赣州 341000
  • 投稿日期:2021-12-30 发布日期:2022-04-28
  • 通讯作者: 黄得财, 朱浩淼
  • 作者简介:
    庆祝中国科学院青年创新促进会十年华诞.
  • 基金资助:
    国家重点研发计划项目(2021YFB3500400); 国家自然科学基金(11904363); 以及中科院重点部署项目(ZDRW-CN-2021-3)

Investigation on the Luminescent Property and Application of In2BP3O12:Cr3+ Broadband Near-Infrared Phosphor

Jingrong Zhanga,b,c, Decai Huangb,c(), Congcong Huangb,c, Sisi Liangb,c, Haomiao Zhua,b,c,d()   

  1. a College of Chemistry and Materials, Fujian Normal University, Fuzhou 350003, China
    b CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
    c Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Xiamen 361021, China
    d Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
  • Received:2021-12-30 Published:2022-04-28
  • Contact: Decai Huang, Haomiao Zhu
  • About author:
    Dedicated to the 10th anniversary of the Youth Innovation Promotion Association, CAS.
  • Supported by:
    National Key R&D Program of China(2021YFB3500400); National Natural Science Foundation of China(11904363); Key Research Program of the Chinese Academy of Sciences(ZDRW-CN-2021-3)

近红外光谱技术在安防监控、食品检测、生物成像、农业等领域具有重要应用价值, 而开发出紧凑高效的近红外光源是其大规模商业应用的前提. 荧光粉转换型近红外发光二极管(light emitting diodes, LED)光源具有结构紧凑、成本低、使用寿命长、发射光谱可调等优点, 因此近些年受到广泛关注, 其关键就在于开发出能被蓝光有效激发的高性能近红外荧光粉. 本工作利用高温固相法制备了一种新型宽带近红外荧光粉In2BP3O12:Cr3+, 在480 nm激发下, 荧光粉发射峰值位于950 nm, 光谱覆盖了750~1350 nm范围, 半峰宽达到210 nm. 采用该荧光粉与商用蓝光InGaN LED芯片封装, 获得了具有宽带发射的近红外LED光源, 在60 mA的驱动电流下, 近红外光辐射功率为5 mW. 当采用该光源照射人的手掌, 用近红外电感耦合器(charge coupled device, CCD)相机能够对手掌中的血管进行清晰的成像. 上述结果表明该近红外荧光粉可用于制备基于蓝光芯片的宽带近红外LED光源, 并在生物医学等领域具有潜在应用前景.

关键词: 近红外荧光粉, In2BP3O12, LEDs, 发光材料, 宽带发射

Near-infrared (NIR) spectroscopy technique plays an important role in night-vision surveillance, food analysis, bioimaging and agriculture fields, and the development of compact and efficient NIR light source is a precondition for their massive commercial applications. Phosphor-converted light emitting diodes (pc-LED) have the advantages of compactness, low-cost, and long operating lifetime, thus have attracted considerable attentions in recent years. The key point is to exploit high performance NIR phosphors which can be excited efficiently by blue diode chips. A number of Cr3+-activated phosphors have been investigated aiming at NIR pc-LED applications. Nevertheless, most of the NIR phosphors show relatively short peak wavelength and narrow full width at half maximum (FWHM), resulting in spectral deficiency in the range 900~1100 nm. The phosphors with ultrabroad bandwidth are more desirable for spectroscopic applications. In this work, a novel broadband NIR light emitting phosphor In2BP3O12:Cr3+ is synthesized by solid state reaction method. The structure, concentration and temperature dependent luminescence properties, electron-phonon coupling as well as the NIR LED performances and applications of the In2BP3O12:Cr3+ have been investigated. Upon 480 nm excitation, the In2BP3O12:Cr3+ phosphor shows a broad emission band peaked at 950 nm and covering 750~1350 nm (bandwidth of ~210 nm), which is owing to the 4T24A2 transition of Cr3+ ions. It is found that the emission intensity of the phosphor at 373 K keep 40% of that at room temperature. A NIR pc-LED is packaged by combining the In2BP3O12:Cr3+ phosphor and a commercial blue InGaN chip, which generates broad NIR light emissions with an output power of ~5 mW at 60 mA drive current. When this NIR pc-LED is used to illuminate the human palm, the blood vessels in the palm are clearly imaged by a NIR charge coupled device (CCD) camera. These results suggest that the In2BP3O12:Cr3+ is a promising phosphor for fabricating NIR pc-LEDs, which are potential for non-destructive analysis in the fields of biology and medicine.

Key words: near infrared phosphor, In2BP3O12, LEDs, luminescent materials, broadband emission