Thermal loading induced near-infrared broadband upconversion emission of Sm3+-doped β-NaYbF4 nano-phosphors

Wang, Xiangfu; Yan, Xiaohong; Kan, Caixia

doi:10.1016/j.jlumin.2011.05.028

Cited by 19 publications

(9 citation statements)

References 23 publications

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“…Other upconversion nanoparticles have also been prepared using the hydrothermal method based on a host of lanthanide fluoride hosts, such as NaYF 4 , − NaYbF 4 , NaLuF 4 , NaGdF 4 , LaF 3 , − BaYF 5 , YF 3 , LuF 3 , CaF 2 , , KMnF 3 (Figure d), KMF 3 (M = Mn, Zn, Cd, or Mg), SrF 2 , and lanthanide oxides or oxysalts, such as Y 2 O 3 , Lu 2 O 3 , TiO 2 , YVO 4 , GdVO 4 , LaPO 4 , and PbWO 4 . It is worth noting that, in the hydrothermal process, the crystalline phase and the morphology of the nanocrystals are affected by many experimental parameters, such as the hydrothermal temperature, reaction time, pH, reactant concentration, solvents, as well as the doping ratio of lanthanide ions …”

Section: Synthesis Of Upconversion Luminescent Nanoparticles (Ucnps)mentioning

confidence: 99%

Upconversion Luminescent Materials: Advances and Applications

et al. 2014

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Assessment of TTA-Based UCNPs 441 9. Detection Applications of Lanthanide UCNPs 441 9.1. Lanthanide UCNPs as Nanothermometers 441 9.2. Upconversion Detection Based on the Inner Filter Effect 442 9.2.1. Lanthanide UCNPs as pH Sensors 442 9.2.2. Lanthanide UCNPs as CO 2 or Ammonia Probes 442 9.2.3. Lanthanide UCNPs as a Cr 6+ Probe 442 9.2.4. Lanthanide UCNPs as Probes for Antioxidants 442 9.3. Design Strategy for Upconversion LRET Detection 442 9.4. Upconversion LRET Detection by Alteration of the Spectral Overlap between Donor and Acceptor 444 9.4.1. Lanthanide UCNPs as CN − Probe 444 9.4.2. Lanthanide UCNPs as a NO 2 − Probe 444 9.4.3. Lanthanide UCNPs as a Cu 2+ Probe 444 9.4.4. Lanthanide UCNPs as Hg 2+ and MeHg + Probes 444 9.4.5. Lanthanide UCNPs as an Oxygen Probe 445 9.4.6. Lanthanide UCNPs as a pH Probe 445 9.4.7. Lanthanide UCNPs as a GSH Probe 445 9.5. UC-LRET Detection by Alteration of the Distance between Donor and Acceptor 445 9.5.1. Lanthanide UCNPs for DNA/RNA Detection 445 9.5.2. Lanthanide UCNPs for Immunoassay 446 9.5.3. Lanthanide UCNPs as Luminescent Probes Based on Ligand−Acceptor Interaction 446 9.5.4. Lanthanide UCNPs as Enzyme-Activity Assay 447 9.5.5. Lanthanide UCNPs as an ATP Probe 447 9.5.6. Lanthanide UCNPs as Hg 2+ Probe 447 9.6. Summary of Upconversion Detection Systems 447 10. Upconversion Materials as a Lighting Source 448 10.1. Solid-State TTA-Based Upconversion Film for Lighting 448 10.1.1. Co-doping Both Sensitizer and Annihilator into a Polymer Matrix 448 10.1.2. Doping the Sensitizer in an Emissive Polymer Matrix 448 10.1.3. TTA-Based Upconversion Luminescence in Nanocrystalline ZrO 2 Films 449 10.1.4. TTA-Based Upconversion Luminescence in Nanofibers and Mats 449 10.2. Lanthanide UCNPs for Lighting 449 10.3. TTA-Based Upconversion Materials for Color-Display Devices 449 10.4. Lanthanide UCNPs for Anticounterfeiting Applications 449 10.5. Lanthanide UCNPs for Fingermark Detection 449 10.6. Lanthanide UCNPs s for 3D-Displays 449 11. Upconversion Materials as a Second Excitation Source 450 11.1. Upconversion Materials for Photocurrent Generation 450 11.1.1. Lanthanide UCNPs for Photocurrent Generation 450 11.1.2. TTA-Based Upconversion Materials for Photocurrent Generation 450 11.1.3. Lanthanide UCNPs for Solar Cells 450 11.1.4. TTA-Based Upconversion Materials for Solar Cells 451 11.2. Upconversion Materials for Photocatalysis 451 11.2.1. Lanthanide UCNPs for Photocatalysis 451 11.2.2. TTA-Based Upconversion for Photocatalysis 451 11.3. Upconversion Materials for Solar Fuels 451 11.4. Upconversion Materials for Photoisomerization 451 11.4.1. Lanthanide UCNPs for Photoisomerization of Diarylethenes 451 455 Abbreviations 455 References 456

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Section: Synthesis Of Upconversion Luminescent Nanoparticles (Ucnps)mentioning

confidence: 99%

Upconversion Luminescent Materials: Advances and Applications

et al. 2014

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“…Nd 3+ -doped UCNPs can generate UC emissions via an ESA process. 49,50 With ETU processes, Yb 3+ -Pr 3+ , 51,52 Yb 3+ -Sm 3+ , 53 and Yb 3+ -Dy 3+ pairs 54,55 can generate UC emissions to a great extent. However, the UC emission efficiency is rather low due to prominent non-radiative relaxations within the activators.…”

Section: Activatormentioning

confidence: 99%

Energy transfer in lanthanide upconversion studies for extended optical applications

2015

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Lanthanide pairs, which can upconvert low energy photons into higher energy photons, are promising for efficient upconversion emission. A typical system with Yb(3+) as a sensitizer can convert short NIR into visible/ultraviolet light via energy transfer between lanthanide ions. Such upconverting nanocrystals doped with lanthanide ions have found significant potential in bioimaging, photochemical reactions and energy conversion. This review presents a fundamental understanding of energy transfer in lanthanide-supported photon upconversion. We introduce the emerging progress in excitation selection based on the energy transfer within lanthanide ions or activation from antennae, with an outlook in the development and applications of the lanthanide upconversion emissions.

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“…For UCL of those lanthanides possessing mismatched energy levels with Yb 3+ , such as Sm 3+ , Sm 2+ , Gd 3+ , Tb 3+ , , and Eu 3+ , the CSU mechanism is usually involved. − The first CSU process was demonstrated with an excited Yb 3+ /Yb 3+ pair by NIR light (1000 nm) excitation in 1970 . After that, Yb 3+ dimers have been widely investigated for generating UCL owing to the simple excited state ( 2 F 5/2 ) of Yb 3+ .…”

Section: Lanthanide-sensitized Upconversion Luminescencementioning

confidence: 99%

“…For example, Zou et al revealed the CSU mechanism of temperature-dependent UCL of Tb 3+ in LiYbF 4 :Tb@LiYF 4 NPs . By exciting Yb 3+ from energy levels of 2 F 7/2 to 2 F 5/2 to form an excited dimer state, UCL from Eu 3+ and Sm 2+ can be generated through energy transfer from Yb 3+ dimer to activator ions. , Interestingly, Wang et al discovered that Yb 3+ dimer energy transfer was determined by the activator concentration . When the Sm 3+ concentration was low (e.g., <0.4%), the CSU mechanism of Yb 3+ /Yb 3+ pair → Sm 3+ was dominant due to the presence of cooperative emission at 475 nm, while the ETU process between Yb 3+ and Sm 3+ was leading when the Sm 3+ concentration was high (e.g., >0.4%), because the cooperative emission at 475 nm disappeared.…”

Section: Lanthanide-sensitized Upconversion Luminescencementioning

confidence: 99%

“…In addition to the downshifting photoluminescence like that usually observed in organic dyes (ODs) and quantum dots (QDs), , it is even more fascinating that lanthanide ions (Ln 3+ ) can also generate high-energy upconversion luminescence (UCL) by successive absorption of multiple low-energy (usually near-infrared, NIR) excitation photons realized through the ladder-like energy levels, whose distribution is closely associated with the specific electronic configurations of Ln 3+ . − UCL with tunable emission features, including wavelength, − lifetime, − and relative intensity, − can be readily obtained by choosing suitable Ln 3+ , particularly when combined with hosts possessing different chemical compositions, − crystallographic parameters, − vibrational energies, − and specially designed structures. − This unique nonlinear photon upconversion process has numerous inherent advantages, such as high photostability, nonphotobleaching or photoblinking, large anti-Stokes shift, and widely tunable lifetimes, offering great potentials in a broad range of research areas. − For ...…”

Section: Introductionmentioning

confidence: 99%

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Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence

et al. 2022

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The attractive features of lanthanide-doped upconversion luminescence (UCL), such as high photostability, nonphotobleaching or photoblinking, and large anti-Stokes shift, have shown great potentials in life science, information technology, and energy materials. Therefore, UCL modulation is highly demanded toward expected emission wavelength, lifetime, and relative intensity in order to satisfy stringent requirements raised from a wide variety of areas. Unfortunately, the majority of efforts have been devoted to either simple codoping of multiple activators or variation of hosts, while very little attention has been paid to the critical role that sensitizers have been playing. In fact, different sensitizers possess different excitation wavelengths and different energy transfer pathways (to different activators), which will lead to different UCL features. Thus, rational design of sensitizers shall provide extra opportunities for UCL tuning, particularly from the excitation side. In this review, we specifically focus on advances in sensitizers, including the current status, working mechanisms, design principles, as well as future challenges and endeavor directions.

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Thermal loading induced near-infrared broadband upconversion emission of Sm3+-doped β-NaYbF4 nano-phosphors

Cited by 19 publications

References 23 publications

Upconversion Luminescent Materials: Advances and Applications

Upconversion Luminescent Materials: Advances and Applications

Energy transfer in lanthanide upconversion studies for extended optical applications

Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence

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