Journal Article10.1088/0957-4484/22/17/175702
Luminescence enhancement and quenching by codopant ions in lanthanide doped fluoride nanocrystals
TL;DR: It is found that the modification of the local environment induced by dopant ions can result in LE if the non-radiative relaxation probability can be ignored and the low local point symmetry effect of the matrix is proposed.
read more
Abstract: Luminescence enhancement (LE) and quenching for lanthanide (Ln) doped nanocrystals is obtained by a second Ln3 + ion doping method. Singly or doubly doped LaOF, LaF3 and NaYF4 nanocrystals are studied in detail under selective or two-color excitations. The underlying reason for LE by codoping is explored, and a mechanism of the enhancement based on the low local point symmetry effect of the matrix is proposed. It is found that the modification of the local environment induced by dopant ions can result in LE if the non-radiative relaxation probability can be ignored. The observations reported here should be useful for improving the quality of Ln3 + doped nanomaterials.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Microwave Synthesis, Photoluminescence, and Photocatalytic Activity of PVA-Functionalized Eu3+-Doped BiOX (X = Cl, Br, I) Nanoflakes
TL;DR: A facile microwave-assisted green synthetic route for colloidal poly(vinyl alcohol) (PVA)-coated europium (Eu(3+))-doped luminescent heavy metal bismuth oxyhalide (BiOX) nanoflakes at low temperature is reported and their structural, optical, and photocatalytic characteristics are examined.
148
Enhanced red upconversion luminescence by codoping Ce3+ in β-NaY(Gd0.4)F4:Yb3+/Ho3+ nanocrystals
TL;DR: In this paper, the upconversion emission tuning from green to red in NaY(Gd0.4)F4:Yb3+/Ho3+ nanocrystals was successfully achieved by replacing Y3+ ions in the nanocrystal structure with Ce3+ ion under 980 nm excitation.
108
Europium-activated luminescent nanoprobes: From fundamentals to bioapplications
TL;DR: In this article, the authors highlight the latest progress in the electronic structures, optical properties and emerging bio applications of Eu3+-activated nanoprobes, which covers from spectroscopic site symmetry, excited-state dynamics, downshifting/upconversion luminescence enhancement strategies, and luminescent biosensing, with an emphasis on their heterogeneous/homogeneous biodetection as well as in vitro and in vivo bioimaging.
75
Advancement in upconversion nanoparticles based NIR-driven photocatalysts
Anees A. Ansari,Mika Sillanpää +1 more
TL;DR: In this article, a comprehensive overview of upconversion nanoparticles (UCNPs) based NIR-driven photocatalysts is presented, and various issues on how to improve the emission efficiency as well as the photocatalysis performance of the as-designed photocATalysts are emphasized.
70
Synthesis of NaYF4 microcrystals with different morphologies and enhanced up-conversion luminescence properties
TL;DR: A systematic study on the UC emissions of Yb(3+)/Tm(3+) codoped NaYF4 samples with microsphere, hexagonal prism, microtube and octahedron shapes has shown that the optical properties of these phosphors are strongly dependent on their morphologies and sizes.
42
References
Semiconductor Clusters, Nanocrystals, and Quantum Dots
TL;DR: In this article, the authors focus on the properties of quantum dots and their ability to join the dots into complex assemblies creates many opportunities for scientific discovery, such as the ability of joining the dots to complex assemblies.
11.6K
Optical absorption intensities of rare-earth ions
TL;DR: In this paper, an expression for the oscillator strength of a transition between two states of the ground configuration $4{f}^{N}, on the assumption that the levels of each excited configuration of the type $4 {f} n{n}^{\ensuremath{'n}d$ or $4
•Book
Handbook on the Physics and Chemistry of Rare Earths
Collectif
- 01 Jan 2015
TL;DR: Handbook on the Physics and Chemistry of Rare Earths as discussed by the authors is a series of books covering all aspects of rare earth science, including chemistry, life sciences, materials science, and physics.
6.2K
Upconversion and Anti-Stokes Processes with f and d Ions in Solids
TL;DR: Before the 1960s, all anti-Stokes emissions, which were known to exist, involved emission energies in excess of excitation energies by only a few kT and were linked to thermal population of energy states above excitation states by such an energy amount.
4.7K
Lanthanide luminescence for functional materials and bio-sciences
TL;DR: This critical review describes the latest developments in the sensitization of near-infrared luminescence, "soft" luminescent materials (liquid crystals, ionic liquids, ionogels), electroluminescentmaterials for organic light emitting diodes, with emphasis on white light generation, and applications in luminecent bio-sensing and bio-imaging based on time-resolved detection and multiphoton excitation.