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High Color-Purity Red, Green, and Blue-Emissive Core–Shell Upconversion Nanoparticles Using Ternary Near-Infrared Quadrature Excitations

机译:使用三元近红外正交激发的高色纯度红色,绿色和蓝色发光核心壳上变化纳米粒子

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摘要

Development of multicolor-emitting upconversion nanoparticles (UCNPs) is of significant importance for applications in optical encoding, anti-counterfeiting, display, and bioimaging. However, realizing the orthogonal three-primary color (TPC) upconversion luminescence in a single nanoparticle remains a huge challenge. Herein, we have rationally designed core–multishell-structured NaYF_(4) UCNPs through regulating the dopant concentration, composition of luminescent layers, and shell position and thickness, which are capable of emitting red, green, and blue luminescence with high color purity in response to ternary near-infrared quadrature excitations (1560/808/980 nm). Moreover, their high color purity is well retained with varying excitation power densities. This orthogonal TPC emissions property of such UCNPs endows them with great promise in the field of security. As a proof-of-concept, we have demonstrated the feasibility of combining such UCNPs with MnO_(2) nanosheets for information encryption and decryption. This work not only offers a new way to achieve TPC upconversion luminescence at a single nanoparticle level but also broadens the scope of application for security protection.
机译:多色发光上转换纳米颗粒(UCNP)的开发对于光学编码、防伪、显示和生物成像等领域的应用具有重要意义。然而,在单个纳米颗粒中实现正交三原色(TPC)上转换发光仍然是一个巨大的挑战。在此,我们通过调节掺杂剂浓度、发光层组成、壳层位置和厚度,合理设计了核-多壳层结构的NaYF_4UCNP,能够在三元近红外正交激发(1560/808/980 nm)下发射高色纯度的红色、绿色和蓝色发光。此外,在不同的激发功率密度下,它们的高颜色纯度得到了很好的保留。这种UCNP的正交TPC排放特性赋予了它们在安全领域的巨大前景。作为概念证明,我们已经证明了将这种UCNP与MnO_2纳米片结合用于信息加密和解密的可行性。这项工作不仅为在单个纳米颗粒水平上实现TPC上转换发光提供了新的途径,而且拓宽了安全保护的应用范围。

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  • 作者单位

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

    State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    NIR quadrature excitations; upconversion luminescence; TPC emissions; core?multishell; encryption and decryption;

    机译:近红外正交激发;上转换发光;TPC排放;果心多壳;加密和解密;
  • 入库时间 2022-08-20 20:23:41

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