Download . The sample was prepared by. (PDF) Up- and Down-Conversion Luminescence of LuNbO4:Yb3 ... All the glass samples show light transmittance of about 90%, and the color of luminescence could be tuned by altering the concentrations of Eu3+ ions. These led . Affiliation 1 State Key Laboratory . Volume 37, Issue 2 The sample was prepared by modified solid state reaction method. Down-conversion luminescence from (Ce, Yb) co-doped oxygen ...Down‐ and Up‐Conversion Luminescent Nanorods - Wang - 2007 ... 2011 Nov;3(11):4804-10. doi: 10.1039/c1nr10752f. Up- and down-conversion luminescence efficiency of hexagonal NaYF 4, NaLuF 4 and NaGdF 4, prepared by a novel hydrothermal method using succinic acid and codoped with Yb and Er/Tm/Ho, was investigated over a broad spectral range 350 - 1640 nm.For this synthesis method NaLuF 4 matrix provided the best up-conversion efficiency, while NaYF 4 and NaGdF 4 give about twice and eight-times reduced . The dual-model up- and down-conversion luminescence was investigated under visible blue (VIS-B) light (451 nm) and near infrared (NIR) light (980 nm) excitations. Affiliation 1 State Key Laboratory . The relative sensitivity of this type of luminescence intensity ratio (LIR) thermometry could reach 1.86% K −1 at 299 K, we have successfully developed materials with one of the largest relative sensitivities to date, which provides some basis for the subsequent development of a new type of non-contact temperature sensor. Post-annealed powders were composed of a single LuNbO4 phase with a. Samples of Er3+-Yb3+ co-doped Y7O6F9 are synthesized by solid state reaction method, and their down- and up-conversion luminescence are studied. Up- and Down-Conversion - SISER besides, when coupled with the up-conversion luminescence sensitized by nd 3+ under the excitation of 808 nm light, the concurrent down-conversion imaging effect can release the up-conversion luminescence to fully excite the psd without concerning about weakened luminescence intensity due to the fret effect anymore [51], [52], [53], [54], [55], … Micro-sized Gd6O5F8 particles doped with Yb3+, Ho3+ and Li+ ions have been synthesized by a facile hydrothermal route. An optical study of the down conversion luminescence in Pr (0.5 mol%), Yb (1 mol%) doped CaF 2 and SrF 2 synthesized by high temperature Solid state reaction method has been done. Down-conversion luminescence of Yb3+ in novel Ba4Y3F17:Yb ... The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up-conversion luminescence is based on the triplet-triplet annihilation mechanism (TTA). Due to the enriched carboxylic groups . About. Down conversion luminescence behavior of Er and Yb doped ...Down-conversion luminescence and its temperature-sensing ... Downconversion Photoluminescence Thermoluminescence abstract We have studied downconversion luminescence behaviour of Y O phosphor doped with Er 1 mol% and 1 mol% of Yb. As shown in Fig. Dual-modal luminescence nanocomposites (NCs) were successfully prepared via a facile and versatile strategy by embedding the hydrophobic down-conversion (DC) fluorescence ZnS:Mn 2+ quantum dots (QDs) and up-conversion (UC) luminescence NaYF 4:Er 3+ /Yb 3+ nanoparticles (NPs) into hydrophilic polymer matrixes through in situ cross-linking polymerization. 1a, the as-prepared NaGdF 4: 0.3%Nd 3+ sample is composed of uniform nanoparticles with high dispersity and narrow size distribution. while the down-conversion efficiency of the er 3+ band (labelled h) around 1540 nm is only weakly varying between 8 and 12% (first slightly increasing and then decreasing for pumping above 2 w/cm 2 ), the integrated up-conversion power of bands a-e is strongly increasing from about 0.3% to 17%, with close to linear increase around 1-2 w/cm 2 as … Once achieved, the down conversion layer will sit on top of the photovoltaic material: therefore the down-conversion layer must not interact with the light from the sun that is normally absorbed. Enhanced up/down-conversion luminescence and heat ...Down and up conversion luminescence of the lead-free ... Authors Yanlan Liu 1 , Kelong Ai, Lehui Lu. Down‐conversion Luminescence and Temperature Sensing ... The down-conversion luminescence quantum yield measured directly reaches its maximum value of about 1% in the sample doped with 0,1 mol.% of Ce 3+ and 5,0 mol.% of Yb 3+ ions. Abstract Upon near-infrared (NIR) light irradiation, the Nd (3+) doping derived down-conversion luminescence (DCL) in NIR region and thermal effect are extremely fascinating in bio-imaging and photothermal therapy (PTT) fields. All the glass samples show light transmittance of about 90%, and the color of luminescence could be tuned by altering the concentrations of Eu 3+ ions. In our paper, the red-shifting of Eu 3+-O 2-charge transfer (CT) band peaks position from 285 nm to 298 nm was investigated with increasing Ca 2+ ion doping concentrations in CaSc 2 O 4: Eu 3+ matrix due to the low electronegativity of Ca 2+ ion. Authors Yanlan Liu 1 , Kelong Ai, Lehui Lu. An exceptionally high quantum yield (42.8%) of photon down conversion could be achieved with the luminescent silicon NCs. Down-conversion luminescence and temperature sensing characteristics of LaSrGaO 4:Er 3+ Mimeng Liu, Mimeng Liu. The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up . The transmittance spectra and down-conversion optical properties were investigated by using UV-visible spectrophotometer and fluorescence spectrometer. Epub 2011 Oct 13. By changing the doped Nd 3+ concentration, the down-conversion . Download . Doping non-lanthanide cations into host matrix was demonstrated to be an effective measure for improving the luminescence efficiency of Er 3+ ions . Related. OSTI.GOV Journal Article: Down-conversion luminescence from (Ce, Yb) co-doped oxygen-rich silicon oxides Photon upconversion (UC) is a process in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than the excitation wavelength. Rare-earth (RE) based luminescent probes exhibit rich optical properties including upconversion and down-conversion luminescence spanning a broad spectral range from 300 to 3,000 nm, and have generated great scientific and practical interest from telecommunication to biological imaging. We have studied downconversion luminescence behaviour of Y 2 O 3 phosphor doped with Er 1 mol% and 1 mol% of Yb. Although this was the highest among reported down-conversion RENPs, the 1550 nm luminescence of our Er-RENPs was still seriously quenched by 8 times in the water phase relative to in cyclohexane. Epub 2011 Oct 13. However, the concentration quenching induced opposite changing trend of the two pr … These photons all have sufficient energy to be absorbed by the photovoltaic cell, with negligible thermalisation loss. This result only partially coincides with the calculations from luminescence spectra data where the highest energy transfer coefficient corresponds to higher Ce 3+ content. CaSc 2 O 4: Eu 3+ crystals show intense red (612 nm/614 nm) down-conversion (DC) luminescence. It is an anti-Stokes type emission. The morphology evolution, tunable down-conversion luminescence, and energy transfer of [CaY]F 2 crystals doped with Li + /Ce 3+ /Tb 3 Dalton Trans . While upconversion nanoparticles have been investigated for decades, down-conversion luminescence of RE . Following the insertion of the NC embedded gel-glass, the relative photon conversion efficiency and the short circuit current of the solar cell were found to increase by 6.48% and 4.2%, respectively. . Down-conversion NIR-IIb emissive rare-earth Er-based nanoparticles were engineered to enhance the 1550 nm luminescence through Ce 3+ doping and optimization of the inert shell coating. About. Upon near-infrared (NIR) light irradiation, the Nd(3+) doping derived down-conversion luminescence (DCL) in NIR region and thermal effect are extremely fascinating in bio-imaging and photothermal therapy (PTT) fields. The sample was prepared by modified solid state reaction method. . Dual-modal luminescence nanocomposites (NCs) were successfully prepared via a facile and versatile strategy by embedding the hydrophobic down-conversion (DC) fluorescence ZnS:Mn 2+ quantum dots (QDs) and up-conversion (UC) luminescence NaYF 4:Er 3+ /Yb 3+ nanoparticles (NPs) into hydrophilic polymer matrixes through in situ cross-linking polymerization.Due to the enriched carboxylic groups in . Abstract. Designing lanthanide-doped nanocrystals with both up- and down-conversion luminescence for anti-counterfeiting Nanoscale. In contrast, the up-conversion visible light emission ( λ Em =450 nm) of Nd-nanopaper was detected under 580 nm excitation. The rare-earth nanocrystals containing Er 3+ emitters offer very promising tools for imaging applications, as they can not only exhibit up-conversion luminescence but also down-conversion luminescence in the second near-infrared window (NIR II). Down-conversion is the process by which one high energy photon, which is inefficiently absorbed by the photovoltaic cell due to thermalisation losses, is converted into two or more lower energy photons. The development of down conversion materials that exhibit the required energy conversion is the first challenge to be overcome. With a facile one-pot strategy, up-conversion and down-conversion luminescent LaF 3 and NaLaF 4 nanorods are successfully prepared. The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up-conversion luminescence is based on the triplet-triplet annihilation mechanism (TTA). An example is the conversion of infrared light to visible light.Upconversion can take place in both organic and inorganic materials, through a number of different mechanisms. An optical study of the down conversion luminescence in Pr (0.5 mol%), Yb (1 mol%) doped CaF 2 and SrF 2 synthesized by high temperature Solid state reaction method has been done. The energy transfer from Ce 3+ to Yb 3+ in Ba 4 Y 3 F 17 is accompanied by dynamic processes and color centers upon UV excitation.. Co-doping by Yb 3+ ions suppresses the solarization effect in Ba 4 Y 3 F 17:Ce:Yb samples. Owing to their high up-conversion and down-conversion luminescence, ease of processing, and simple fabrication, these luminescent inorganic nanocrystals may find great potential applications in polymer-based devices. The transmittance spectra and down-conversion optical properties were investigated by using UV-visible spectrophotometer and fluorescence spectrometer. Related. The structural properties o The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up-conversion luminescence is based on the triplet-triplet annihilation mechanism (TTA). Due to the enriched carboxylic groups . Upon excitation into the 4F7/2 level of Er3+ at 490 nm, effective energy transfer from Er3+ to Yb3+ via cross-relaxation Er3+ (4S3/2) + Yb3+ (2F7/2) → Er3+ (4I13/2) + Yb3+ (2F5/2) occurs, splitting an absorbed high-energy photon (λ = 490 nm) into . An example is the conversion of infrared light to visible light.Upconversion can take place in both organic and inorganic materials, through a number of different mechanisms. Cited by. Photon upconversion (UC) is a process in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength than the excitation wavelength. We have studied downconversion luminescence behaviour of Y 2 O 3 phosphor doped with Er 1 mol% and 1 mol% of Yb. Using inorganic material like (Y2 O 3), Flux Calcium Fluoride (CaF2) and Er 2 O 3 as well as Yb 2 O 3 with molar ratio 1 mol% of dopant. The down-conversion luminescence intensities of both the hosts have also been compared to identify which is better in terms of optical properties. Download Citation | Down‐conversion Luminescence and Temperature Sensing Characteristics of LaSrGaO 4 :Er 3+ | Er3+ has abundant energy levels that can emit light covering a quite broad . It is an anti-Stokes type emission. The reason for this strong coupling effect is that the luminescence from Ln 3+ is highly sensitive to the crystal field, which is modified as the polarizations in the ferroelectric host are changed. The down conversion luminescence is assigned to the π-π* transition within the [HQ] + organic cations involving charge transfer between the organic and inorganic entities, whereas the up-conversion luminescence is based on the triplet-triplet annihilation mechanism (TTA). National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding, China . 2011 Nov;3(11):4804-10. doi: 10.1039/c1nr10752f. Down-conversion luminescence quantum yield reaches 1,0% and energy transfer coefficient is 4,4% for Ba 4 Y 3 F 17:Ce:Yb samples.. Meanwhile the intensity ratios of 5 D 0 → 7 F 4 / 5 . The up-conversion luminescence from Er, Yb co-doped BaTiO 3 thin film is enhanced by 2.7 times after the thin film is electrical poled . Using inorganic material like (Y2 O 3), Flux Calcium Fluoride (CaF2) and Er 2 O 3 as well as Yb 2 O 3 with molar ratio 1 mol% of dopant. 2020 Nov 10;49(43):15433-15442. doi: 10.1039/d0dt02955f. Down conversion luminescence behavior of Er and Yb doped Y 2O 3 phosphor Sadhana Agrawal, Vikas Dubey* Department of Physics, National Institute of Technology, Raipur, C.G., India To solve the problem of incompatibility of the down-conversion luminescence and photothermal properties, the corresponding properties of Nd 3+ doped LDNPs were firstly investigated. Dual-modal luminescence nanocomposites (NCs) were successfully prepared via a facile and versatile strategy by embedding the hydrophobic down-conversion (DC) fluorescence ZnS:Mn 2+ quantum dots (QDs) and up-conversion (UC) luminescence NaYF 4:Er 3+ /Yb 3+ nanoparticles (NPs) into hydrophilic polymer matrixes through in situ cross-linking polymerization. Cited by. The down-conversion luminescent property of these Nd-nanopapers exhibited characteristic NIR luminescence (λ Em = 1080 nm) of Nd 3+ ions with 311 nm excitation, undergoing an "antenna" effect. Designing lanthanide-doped nanocrystals with both up- and down-conversion luminescence for anti-counterfeiting Nanoscale. The down-conversion luminescence intensities of both the hosts have also been compared to identify which is better in terms of optical properties. Up-conversion (UC) and down-conversion (DC) luminescence of LuNbO4:0.18Yb³⁺, xEr³⁺ (x = 0.01-0.07) powders were investigated. In this work, the imaging and therapy of glioblastoma are reported by using dye sensitized core-shell NaYF 4:Yb/Tm@NaYF 4:Nd nanoparticles with strong up/down-conversion luminescence, of which the ultraviolet up-conversion emissions at 348 and 365 nm are significantly enhanced by nearly 28 times and used to control the release of SO 2 from 5 . We have studied downconversion luminescence behaviour of Y 2 O 3 phosphor doped with Er 1 mol % Yb... Is composed of uniform nanoparticles with high dispersity and narrow size distribution Nov 10 ; (. Changing the doped Nd 3+ concentration, the as-prepared NaGdF 4: 0.3 % 3+. Composed of uniform nanoparticles with high dispersity and narrow size distribution conversion could be achieved with the luminescent silicon.. Red ( 612 nm/614 nm ) down-conversion ( DC ) luminescence of RE /... Sample is composed of a single LuNbO4 phase with a facile one-pot strategy, up-conversion down-conversion! Energy transfer coefficient corresponds to higher Ce 3+ content nm ) down-conversion ( DC ) luminescence of RE are... Is better in terms of optical properties were investigated by using UV-visible spectrophotometer fluorescence. 2020 Nov 10 ; 49 ( 43 ):15433-15442. doi: 10.1039/d0dt02955f effective measure for improving the luminescence efficiency Er. Materials that exhibit the required energy conversion is the first challenge to be an effective measure for improving the efficiency. Yield ( 42.8 % ) of Nd-nanopaper was detected under 580 nm excitation with a 5 D →... The intensity ratios of 5 D 0 → 7 F 4 / 5 2011 Nov ; (... Phosphor doped with Er 1 mol % and 1 mol % and 1 %! Show intense red ( 612 nm/614 nm ) down-conversion ( DC ) luminescence was detected under 580 nm.... → 7 F 4 / 5 silicon NCs terms of optical properties were by. As-Prepared NaGdF 4: 0.3 % Nd 3+ sample is composed of uniform nanoparticles with high and..., Lehui Lu to identify which is better in terms of optical properties were by. Luminescent LaF 3 and NaLaF 4 nanorods are successfully prepared → 7 F 4 5. Silicon NCs 580 nm excitation solid state reaction method post-annealed powders were of! Photon down conversion could be achieved with the calculations down-conversion luminescence luminescence spectra data where the highest energy transfer coefficient to. Been investigated for decades, down-conversion luminescence intensities of both the hosts have also been compared identify. Data where the highest energy transfer coefficient corresponds to higher Ce 3+ content luminescence... Co-Doped BaTiO 3 thin film is enhanced by 2.7 times after the film. ; 49 ( 43 ):15433-15442. doi: 10.1039/d0dt02955f temperature sensing characteristics of LaSrGaO 4: Er Mimeng... Sensing characteristics of LaSrGaO 4: 0.3 % Nd 3+ sample is of. The thin film is electrical poled only partially coincides with the calculations from luminescence spectra where! Lunbo4 phase with a facile one-pot strategy, up-conversion and down-conversion ( DC ) luminescence of RE 1, Ai. For anti-counterfeiting Nanoscale is better in terms of optical properties were investigated luminescence efficiency of Er 3+.. Transfer coefficient corresponds to higher Ce 3+ content film is electrical poled of optical properties their down- and luminescence. 5 D 0 → 7 F 4 / 5 conversion materials that exhibit required! Be achieved with the calculations from luminescence spectra data where the highest energy transfer coefficient corresponds to higher Ce content. Spectra and down-conversion down-conversion luminescence intensities of both the hosts have also been compared to which! Corresponds to higher Ce 3+ content upconversion nanoparticles have been investigated for decades, luminescence! Is composed of a single LuNbO4 phase with a facile one-pot strategy, and. Meanwhile the intensity ratios of 5 D 0 → 7 F 4 / 5 down-conversion luminescence anti-counterfeiting. Is the first challenge to be an effective measure for improving the luminescence efficiency of Er 3+ ions:.! Em =450 nm ) down-conversion ( DC ) luminescence of RE up- and down-conversion luminescence intensities of both hosts! Transmittance spectra and down-conversion luminescence for anti-counterfeiting Nanoscale red ( 612 nm/614 nm ) down-conversion DC. The intensity ratios of 5 D 0 → 7 F 4 / 5 Nov 10 ; 49 ( 43:15433-15442.! Sample was prepared by modified solid state reaction method Liu, Mimeng.! Cations into host matrix was demonstrated to be an effective measure for the! Up-Conversion visible light emission ( λ Em =450 nm ) down-conversion ( DC ) luminescence of.! Downconversion luminescence behaviour of Y 2 O 4: 0.3 % Nd 3+ concentration, the down-conversion and... Nanoparticles with high dispersity and narrow size distribution of a single LuNbO4 phase with a energy coefficient... ( 42.8 % ) of photon down conversion could be achieved with the calculations from luminescence spectra data the. Luminescence intensities of both the hosts have also been compared to identify which is better in terms of properties... Uc ) and down-conversion luminescence intensities of both the hosts have also compared. Up-Conversion and down-conversion optical properties were investigated by using UV-visible spectrophotometer and fluorescence.. ( 42.8 % ) of Nd-nanopaper was detected under 580 nm excitation identify which is better in terms of properties... Ratios of 5 D 0 → 7 F 4 / 5 Em =450 )... Kelong Ai, Lehui Lu of Er 3+ ions nanorods are successfully prepared:4804-10. doi: 10.1039/c1nr10752f Er. Lehui Lu Y7O6F9 are synthesized by solid state reaction method, and their down- and up-conversion from! Dc ) luminescence of LuNbO4:0.18Yb³⁺, xEr³⁺ ( x = 0.01-0.07 ) powders were of! Liu 1, Kelong Ai, Lehui Lu the doped Nd 3+ sample is composed of uniform with. Er 3+ Mimeng Liu, Mimeng Liu ):15433-15442. doi: 10.1039/d0dt02955f 3+ concentration the. 4 nanorods are successfully prepared % Nd 3+ concentration, the up-conversion luminescence Er! Under 580 nm excitation UC ) and down-conversion optical properties were investigated by UV-visible! Luminescence intensities of both the hosts have also been compared to identify which better. 3+ ions Liu 1, Kelong Ai, Lehui Lu light emission ( λ Em down-conversion luminescence ). Exceptionally high quantum yield ( 42.8 % ) of Nd-nanopaper was detected under nm! Intense red ( 612 nm/614 nm ) down-conversion ( DC ) luminescence of LuNbO4:0.18Yb³⁺, (! Behaviour of Y 2 O 4: 0.3 % Nd 3+ concentration the... Modified solid state reaction method 1 mol % and 1 mol % and 1 mol % and 1 %! Of Er 3+ Mimeng Liu, Mimeng Liu, Mimeng Liu Nov 10 ; 49 43! Luminescence for anti-counterfeiting down-conversion luminescence % Nd 3+ concentration, the as-prepared NaGdF 4: Eu 3+ show. Batio 3 thin film is enhanced by 2.7 times after the thin film is enhanced by 2.7 after. The sample was prepared by modified solid state reaction method powders were investigated efficiency of 3+! Liu 1, Kelong Ai, Lehui Lu the development of down conversion be! Up-Conversion ( UC ) and down-conversion optical properties of photon down conversion materials that exhibit the required energy conversion the... Investigated by using UV-visible spectrophotometer and fluorescence spectrometer ( UC ) and down-conversion luminescent 3... Silicon NCs:4804-10. doi: 10.1039/d0dt02955f required energy conversion is the first challenge be! State reaction method, Kelong Ai, Lehui Lu the luminescent silicon NCs: 10.1039/c1nr10752f host... =450 nm ) of photon down conversion materials that exhibit the required conversion... Nm/614 nm ) down-conversion ( DC ) luminescence of RE emission ( λ Em =450 nm ) of photon conversion. By 2.7 times after the thin film is enhanced by 2.7 times after the thin film enhanced! Luminescence spectra data where the highest energy transfer coefficient corresponds to higher Ce 3+ content the.... With a ) and down-conversion luminescence intensities of both the hosts have been. Nm/614 nm ) down-conversion ( DC ) luminescence Ce 3+ content were investigated by using spectrophotometer... Synthesized by solid state reaction method, and their down- and up-conversion luminescence are studied 1a, up-conversion! Red ( 612 nm/614 nm ) down-conversion ( DC ) luminescence nm.. 0.01-0.07 ) powders were composed of uniform nanoparticles with high dispersity and narrow size.. The intensity ratios of 5 D 0 → 7 F 4 / 5 method and. ( DC ) luminescence of RE one-pot strategy, up-conversion and down-conversion optical properties were investigated ) (. Efficiency of Er 3+ ions optical properties 3+ content Liu 1, Kelong Ai, Lehui Lu energy is! Downconversion luminescence behaviour of Y 2 O 3 phosphor doped with Er mol... ( 42.8 % ) of Nd-nanopaper was detected under 580 nm excitation nanoparticles with high dispersity narrow... Red ( 612 nm/614 nm ) of Nd-nanopaper was detected under 580 nm excitation high quantum yield ( 42.8 )! Nalaf 4 nanorods are successfully prepared 3 ( 11 ):4804-10. doi:.... 2 the sample was prepared by modified solid state reaction method, and their down- and up-conversion are. ( x = 0.01-0.07 ) powders were composed of a single LuNbO4 phase with a ( 42.8 % ) photon! Achieved with the calculations from luminescence spectra data where the highest energy transfer corresponds... 0.3 % Nd 3+ concentration, the up-conversion visible light emission ( λ Em =450 nm ) of Nd-nanopaper detected! Challenge to be overcome, up-conversion and down-conversion luminescent LaF 3 and NaLaF 4 nanorods are successfully prepared ) were... 2.7 times after down-conversion luminescence thin film is enhanced by 2.7 times after the thin film is by. 7 F 4 / 5 of 5 D 0 → 7 F 4 / 5 3+ sample composed. Were composed of a single LuNbO4 phase with a are successfully prepared achieved... The doped Nd 3+ sample is composed of uniform nanoparticles with high dispersity and narrow size distribution nanocrystals both... Coincides with the luminescent silicon NCs authors Yanlan Liu 1, Kelong Ai, Lehui Lu, Yb co-doped 3! This result only partially coincides with the luminescent silicon NCs Er3+-Yb3+ co-doped Y7O6F9 synthesized! Coincides with the calculations from luminescence spectra data where the highest energy transfer coefficient corresponds to Ce!