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Luminescent lanthanide coordination polymer crystals (LCPCs) represent an area of growing interest in materials chemistry owing to their unique and tailorable functional properties. The LCPCs provide a high level of structural tunability, including size- and morphology-dependent properties; therefore, they are promising materials for next-generation phosphors in a wide range of applications such as light emitting diodes. Here, by controlling the morphology of thermostable europium coordination polymer crystals, [Eu(hfa)3(dpbp)]n, hfa: hexafluoroacetylacetonate and dpbp:4,4’-bis(diphenyl　phosphoryl) biphenyl), we realized a novel red phosphor with narrow linewidth emission (FWHM= 7.8 nm). The obtained luminescent LCPCs with unique structures were characterized by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), dynamic light scattering (DLS) and thermogravimetric analysis. Among, them, size tunable crystalline polymer spheres were found to have high internal quantum efficiency (ex., IQE = 79%) and highly thermostability (>300°C), and to exhibit dispersibility in PMMA media. The obtained results on the structural tunability of these materials can be used for the development of synthesis techniques for nanoscale materials based on crystalline lanthanide-based coordination phosphors.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: lanthanide, luminescence

Date published: 2023-12-31

Publisher: Informa UK Limited

Journal:

• Science and Technology of Advanced Materials (ISSN: 14686996) vol. 24 issue. 1 2183711

Funding:

• JSPS Kaken Grant-in-Aid for Scientific Researc Grant-in-Aid for Grant Number 21H02031
• JSPS Kaken Grant-in-Aid for Early-Career Scientist Grant-in-Aid for Grant Number 17H04873

Manuscript type: Publisher's version (Version of record)

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First published URL: https://doi.org/10.1080/14686996.2023.2183711

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Updated at: 2024-06-28 08:30:19 +0900

Published on MDR: 2024-06-28 08:30:19 +0900