绿色合成Li3Na3Ga2F12:Cr3+氟化物宽带近红外荧光材料(特邀)
Li3Na3Ga2F12:Cr3+ Fluoride Wideband Near-Infrared Fluorescence Material Synthesized by Green Method(Invited)
李杨 1禹湘 2安喜梅 2谭巧玲 2刘红嘉 2李振彰 2张绍安1
作者信息
- 1. 广州医科大学生物医学工程学院,广东 广州 511436;宁波大学信息科学与工程学院光+X交叉科学与技术研究院,浙江 宁波 315211
- 2. 广州医科大学生物医学工程学院,广东 广州 511436
- 折叠
摘要
近红外光源对生物组织具有穿透力强、无损检测、信噪比高等特点,广泛应用于成分检测、安防监控、生物医学等领域.但是目前缺乏高效率、便携化的近红外光源,这成为了限制智能检测技术发展的关键.与传统的近红外光源相比,荧光粉转换的近红外LED光源(NIR pc-LED)具有便携、高效的特点.本研究采用工艺简单、绿色环保的水热法合成了Li3Na3Ga2F12∶Cr3+近红外宽带荧光粉,并通过控制保温温度、保温时间等参数,确定了荧光材料的最佳合成方案,研究了氟化物颗粒尺寸、形貌演化,以及Cr3+掺杂浓度对Li3Na3Ga2F12∶Cr3+发光性能的影响.Li3Na3Ga2F12∶Cr3+材料能够实现630～980 nm范围宽带发射,半峰全宽(FWHM)为 110 nm,峰值为 766 nm,其内量子效率高达 74%.结合商用蓝光LED,成功封装了近红外宽带LED光源,其在50 mA驱动电流下的近红外光输出功率是10.32 mW,光电转换效率达到5.1%.最后通过鸡胸肉下的静脉近红外成像以及夜视成像演示,验证了该近红外宽带LED光源在医疗以及食品检测等成像领域中的应用可行性.
Abstract
The near-infrared light source possesses strong penetration,non-destructive testing capabilities,and a high signal-to-noise ratio for biological tissues.It finds extensive applications in component detection,security monitoring,biomedicine,national defense,and the military industry.However,the lack of highly efficient and portable near-infrared light sources has become a key obstacle to the development of intelligent detection technology.In comparison with traditional near-infrared light sources,phosphor-converted near-infrared LED light sources(NIR pc-LEDs)offer advantages such as portability and high efficiency.This study focuses on synthesizing Li3Na3Ga2F12∶Cr3+ broadband phosphors through a simple and environmentally friendly hydrothermal synthesis method.By controlling factors like holding temperature and holding time,an optimal synthesis scheme for fluorescent materials is determined.The influence of fluoride particle size,morphology evolution,and Cr3+ doping concentration on the luminescence properties of Li3Na3Ga2F12∶ Cr3+ is also investigated.The synthesized Li3Na3Ga2F12∶ Cr3+ material exhibits broadband emission ranging from 630 nm to 980 nm with a full width at half maximum(FWHM)of 110 nm and a peak value at 766 nm.Its internal quantum efficiency reaches an impressive 74%.Through successful packaging with commercial blue LED,a NIR wideband LED source is achieved.The output power of NIR light at 50 mA driving current is 10.32 mW,and the photoelectric conversion efficiency reaches 5.1%.Finally,the feasibility of using the NIR broadband LED light source in imaging fields such as medical and food detection is verified by NIR imaging of veins under chicken breast and night vision imaging demonstrations.
关键词
绿色合成/宽带近红外发光/Li3Na3Ga2F12∶Cr3+/LED器件Key words
green synthesis/broadband near-infrared luminescence/Li3Na3Ga2F12∶Cr3+/LED device引用本文复制引用
基金项目
国家自然科学基金(52172083)
广东省国际科技合作计划(2021A0505030078)
广州市重点研发计划(2023B03J1239)
广州市教育系统创新学术团队计划(202235404)
中国博士后科学基金(2022M720919)
出版年
2024
NETL
NSTL
万方数据