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Research Article

Rare-earth single atom based luminescent composite nanomaterials: Tunable full-color single phosphor and applications in WLEDs

Shan Bao1, Haiyue Yu1, Guoyang Gao1, Hongyang Zhu2, Dingsheng Wang3, Peifen Zhu4( ), Guofeng Wang1 ( )
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
School of Physics and Electronic Engineering, Linyi University, Linyi 276005, China
Department of Chemistry, Tsinghua University, Beijing 100084, China
Department of Physics and Engineering Physics, The University of Tulsa, Tulsa, OK 74104, USA
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Graphical Abstract

Rare-earth single atom based NaGdF4:Tb3+/Eu3+@C:N/Eu3+ single phosphor with tunable full-color luminescence was reported, and the results of density functional theory (DFT) calculation prove that C atoms are more favorable for anchoring Eu3+ single atoms. The white light-emitting diode (WLED) device constructed using this single phosphor has a stable and excellent color rendering index and a controllable color temperature, and has broad application possibilities in WLEDs.

Abstract

High-quality single-component white phosphors are instrumental in realizing high-efficiency devices. Rare earth fluorides and carbon quantum dots have great potential in the white light-emitting diode (WLED) field due to their unique advantages. Here, Rare-earth single atom based NaGdF4:Tb3+/Eu3+@C:N/Eu3+ single phosphor with tunable full-color luminescence was reported. The results of density functional theory (DFT) calculation and experimental characterization show that C atoms cannot be replaced by Eu3+, but C atoms are more favorable for anchoring Eu3+ single atoms. The DFT was employed to optimize the structures of the C:N/Eu3+ and NaGdF4:Tb3+/Eu3+, and calculate the work function, optical properties, and charge density difference. The obtained tunable full-color single phosphor can emit stable light from blue to red or even white. The constructed WLED devices also have stable and excellent color performance, that is, a color rendering index of up to 95 and a lower color temperature, and it has broad application possibilities in WLEDs.

Keywords

single atomsluminescencesingle phosphorwhite light-emitting diodes

Electronic Supplementary Material

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Nano Research
Volume 15 Issue 4,
April 2022
Pages 3594-3605
DOI: 10.1007/s12274-021-3886-x
Cite this article:
Bao S, Yu H, Gao G, et al. Rare-earth single atom based luminescent composite nanomaterials: Tunable full-color single phosphor and applications in WLEDs. Nano Research, 2022, 15(4): 3594-3605. https://doi.org/10.1007/s12274-021-3886-x
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Received: 15 August 2021
Revised: 13 September 2021
Accepted: 14 September 2021
Published: 15 October 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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