Journal
NANO RESEARCH
Volume 15, Issue 4, Pages 3594-3605Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3886-x
Keywords
single atoms; luminescence; single phosphor; white light-emitting diodes
Categories
Funding
- National Natural Science Foundation of China [21871079, 11774128]
- Natural Science Foundation of Shandong Province [ZR2018JL003, 2019KJJ003]
- National Science Foundation [1945558]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1945558] Funding Source: National Science Foundation
Ask authors/readers for more resources
Rare earth fluorides and carbon quantum dots show great potential in the WLED field with the ability to achieve tunable full-color luminescence. Through DFT calculation and experimental characterization, it was found that C atoms are more favorable for anchoring Eu3+ single atoms, which provides possibilities for constructing stable and excellent color performance in WLED devices.
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available