应用化学 ›› 2023, Vol. 40 ›› Issue (12): 1623-1629.DOI: 10.19894/j.issn.1000-0518.230210

• 稀土 • 上一篇    下一篇

Er3+/Tm3+共掺镱基纳米晶上转换白光调控及应用

安正策, 王丽萍, 周博()   

  1. 华南理工大学材料科学与工程学院,发光材料与器件国家重点实验室,广州 510641
  • 收稿日期:2023-07-21 接受日期:2023-11-29 出版日期:2023-12-01 发布日期:2024-01-03
  • 通讯作者: 周博
  • 基金资助:
    国家自然科学基金(51972119)

White-Light Upconversion and Application of Er3+/Tm3+ Co-Doped Ytterbium-Based Nanoparticles

Zheng-Ce AN, Li-Ping WANG, Bo ZHOU()   

  1. State Key Laboratory of Luminescent Materials and Devices,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China
  • Received:2023-07-21 Accepted:2023-11-29 Published:2023-12-01 Online:2024-01-03
  • Contact: Bo ZHOU
  • About author:zhoubo@scut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51972119)

摘要:

稀土掺杂上转换白光材料在固态照明、液晶显示器和信息防伪等领域具有重要应用前景。 然而,以前的工作主要集中在惰性基质材料体系,难以大幅提升敏化剂掺杂浓度,大大限制了上转换白光发射强度。 为解决这一问题,提出一种基于LiYbF4@LiYF4的核壳纳米结构设计,以敏化剂LiYbF4基质为晶核并掺杂适当浓度的激活剂Er3+和Tm3+,成功实现980 nm激发的上转换白光发射。 进一步设计了LiYbF4∶Er/Tm@LiYbF4@LiYF4∶Nd核壳壳结构,利用Nd3+吸收808 nm激发光,实现了980和808 nm双通道激发的上转换白光发射。 将白光上转换纳米晶结合940 nm近红外芯片封装成发光二极管(LED)器件,施加300 mA电流激发出明亮的白光,展示了其在白光LED方面的应用潜力。

关键词: 上转换发光, 稀土纳米晶, 核壳结构, 白光, 发光二极管

Abstract:

Lanthanide ions doped white-light upconversion materials have important applications in solid state lighting, liquid crystal display and information anti-counterfeiting. However, previous research mainly focus on inert matrix materials, which are difficult to significantly increase the concentration of sensitizer, limiting the emission intensity of white-light upconversion. Herein, a LiYbF4@LiYF4 core-shell nanostructure design is proposed. By using the sensitizing LiYbF4 nanocrystals as host doping with appropriate concentrations of Er3+ and Tm3+ activators, white-light upconversion emission is successfully achieved under 980 nm excitation. The LiYbF4∶Er/Tm@LiYbF4@LiYF4∶Nd core-shell-shell nanostructure is further designed to realize the white-light emission under 980 and 808 nm dual-channel excitation through using additional sensitizer Nd3+. Finally, a package of both white-light upconversion nanoparticles and 940 nm near-infrared chips into LED device contributes to bright white-light emission by applying 300 mA current, showing great potential in white LED.

Key words: Upconversion luminescence, Lanthanide nanocrystals, Core-shell structure, White-light emission, Light-emitting diode

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