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Simple method for simultaneously achieving red and green up-conversion luminescence

机译：同时实现红色和绿色上转换发光的简单方法

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摘要

The simultaneous emission of red and green light with high brightness and color purity was obtained from Er3+-doped NaYbF4-based up-conversion nanoparticles excited by 980 and 1550 nm excitation. The 2F5/2 level of Yb3+ showed high absorption efficiency at 980 nm. The I-4(13/2) level of Er3+, an excellent UC intermediate with high energy and a long lifetime (milliseconds), absorbed more energy in the cross section (6.0 x 10(-20) cm(2)) than did the Yb3+ F-2(5/2) level (1.2 x 10(-20) cm(2)) and was efficiently and directly pumped by light with a wavelength of similar to 1500 nm. In contrast to particles resulting from other methods using complex coating for achieving multi-color emission in a single sample, the as-prepared luminescent NaYbF4: 25% Er3+ up-conversion nanoparticles were designed to be single-layered and spherical and showed excellent dispersibility and uniform sizes. Nanoparticles prepared by this method exhibit a great advantage based on the simple preparation process and small particle size. On this basis, we expect to easily achieve the emission of three primary colors by these reasonably designed core-shell particles.
机译：从980和1550nm激发激发的基于ER3 + - 掺杂的Naybf4的上转化纳米颗粒，获得具有高亮度和颜色纯度的红色和绿光的同时排放。 YB3 +的2F5 / 2水平显示出高980nm的高吸收效率。 ER3 +的I-4（13/2）水平，具有高能量和长寿命（毫秒）的优异的UC中间体（毫秒），在横截面中吸收更多的能量（6.0×10（220）cm（2）） YB3 + F-2（5/2）水平（1.2×10（-20）cm（2）），并有效地通过光的光泵送，波长类似于1500nm。与使用复合涂层的其他方法产生的颗粒相反，用于在单个样品中实现多色发射，设计为25％ER3 +上转化纳米颗粒以单层和球形，并显示出优异的分散性和均匀尺寸。通过该方法制备的纳米颗粒基于简单的制备方法和小粒径表现出很大的优势。在此基础上，我们希望通过这些合理设计的核心壳颗粒轻松实现三种原色的排放。

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  • 来源
    《RSC Advances》 |2017年第79期|共5页
  • 作者

    Yin Xiumei; Wang Hong; Xing Mingming; Fu Yao; Tian Ying; Luo Xixian;

  • 作者单位

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

    Dalian Maritime Univ Phys Dept Dalian 116026 Liaoning Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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