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

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 NaGdF 4 :Tb 3+ /Eu...

Full description

Saved in:
Bibliographic Details
Published in:Nano research 2022-04, Vol.15 (4), p.3594-3605
Main Authors: Bao, Shan, Yu, Haiyue, Gao, Guoyang, Zhu, Hongyang, Wang, Dingsheng, Zhu, Peifen, Wang, Guofeng
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Charge density
Chemistry and Materials Science
Color
Color temperature
Condensed Matter Physics
Density functional theory
Earth
Europium
Fluorides
Light emitting diodes
Materials Science
Mathematical analysis
Nanomaterials
Nanotechnology
Optical properties
Phosphors
Quantum dots
Rare earth elements
Research Article
Terbium
White light
Work functions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 NaGdF 4 :Tb 3+ /Eu 3+ @C:N/Eu 3+ 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 Eu 3+ , but C atoms are more favorable for anchoring Eu 3+ single atoms. The DFT was employed to optimize the structures of the C:N/Eu 3+ and NaGdF 4 :Tb 3+ /Eu 3+ , 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.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-021-3886-x