KMnF3:Yb3+,Er3+@KMnF3:Yb3+ active-core–active-shell nanoparticles with enhanced red up-conversion fluorescence for polymer-based waveguide amplifiers operating at 650 nm

Zhang, Yongling; Wang, Fei; Lang, Yanbo; Yin, Jiao; Zhang, Meiling; Liu, Xiaohui; Zhang, Daming; Zhao, Dan; Qin, Guanshi; Qin, Weiping

doi:10.1039/c5tc01838b

Cited by 39 publications

(18 citation statements)

References 37 publications

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“…Figure 4(d) displays the CIE color coordinates of the corresponding NPs excited by 980 nm. In the fluorescence spectra of KMnF 3 :18%Yb 3+ ,1%Er 3+ NPs, an emission peak at~653 nm can be clearly seen as a result of 4 F 9/2 ⟶ 4 I 15/2 radiation transition, which is due to the existence of efficient energy transfer between Er 3+ and Mn 2+ : 2 H 11/2 , 4 S 3/2 + 6 A 1 ⟶ 4 I 15/2 + 4 T 1 , 2 H 9/2 + 6 A 1 ⟶ 4 I 13/2 + 4 T 1 , and 4 I 15/2 + 4 T 1 ⟶ 4 F 9/2 + 6 A 1 [14,15] (the energy-level diagram of KMnF 3 :Yb 3+ ,Er 3+ NPs excited with a 980 nm laser is shown in Figure S1). Therefore, KMnF 3 :Yb 3+ ,Er 3+ NPs can emit red fluorescence, which can be demonstrated by digital photos and the CIE color coordinates of KMnF 3 :Yb 3+ ,Er 3+ NPs.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Application in Anticounterfeiting of RGB Upconversion Nanoparticles

Zhang

Qin

2019

Journal of Nanomaterials

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In this paper, we synthesized ~105±15 nm cubic phase KMnF3:Yb3+,Er3+ NPs, ~195±10 nm hexagonal phase NaYF4:Yb3+,Tm3+ NPs, and ~200±10 nm hexagonal phase NaYF4:Yb3+,Er3+ NPs. Under the excitation of 980 nm, the strong red upconversion luminescence (4F9/2⟶4I15/2, the peak is located at ~653 nm) of Er3+ ions of KMnF3:Yb3+,Er3+ NPs can be seen, the strong blue upconversion luminescence (1D2⟶3F4, 1G4⟶3H6; the peaks are located at ~451 nm and ~477 nm, respectively) of Tm3+ ions of NaYF4:Yb3+,Tm3+ NPs can be observed, and the strong green upconversion luminescence (4I11/2⟶4I15/2, 4S3/2⟶4I15/2; the peaks are located at ~524 nm and ~541 nm, respectively) of Er3+ ions of NaYF4:Yb3+,Er3+ NPs can be found. The mixed white upconversion luminescent materials can be obtained by adjusting the doping ratio of the above NPs. Cyclohexane solution of red, blue, green, and the mixed white NPs can be used as ink, and “JLNU” is written on paper with a pen. Without 980 nm radiation, nothing could be seen. Under 980 nm irradiation, the colored letters “JLNU” can be seen. Red, blue, green, and the mixed white upconversion NPs can be used in security anticounterfeiting.

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Section: Resultsmentioning

confidence: 99%

“…Finally, all the solutions in the beaker were placed in the hydrothermal reactor and kept at 200 degrees for 12 hours. The reaction product was centrifugally washed with a mixture of ethanol and cyclohexane [14,15].…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Application in Anticounterfeiting of RGB Upconversion Nanoparticles

Zhang

Qin

2019

Journal of Nanomaterials

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“…For example, the introduction of transition metals (Mn 2+ , etc.) into Yb/Er co-doped nanomaterials can enhance the R/G (650-to-545 nm) ratio and achieve single-red-band emission because of the strongly ET process between Er 3+ and Mn 2+ [20–24].…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Enhanced Red Upconversion Emission from a Single β-NaYF4:Yb/Er Microcrystal By Doping with Mn2+ Ions

et al. 2019

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The presence of manganese ions (Mn2+) in Yb/Er-co-doped nanomaterials results in suppressing green (545 nm) and enhancing red (650 nm) upconversion (UC) emission, which can achieve single-red-band emission to enable applications in bioimaging and drug delivery. Here, we revisit the tunable multicolor UC emission in a single Mn2+-doped β-NaYF4:Yb/Er microcrystal which is synthesized by a simple one-pot hydrothermal method. Excited by a 980 nm continuous wave (CW) laser, the color of the single β-NaYF4:Yb/Er/Mn microrod can be tuned from green to red as the doping Mn2+ ions increase from 0 to 30 mol%. Notably, under a relatively high excitation intensity, a newly emerged emission band at 560 nm (2H9/2 → 4I13/2) becomes significant and further exceeds the traditional green (545 nm) emission. Therefore, the red-to-green (R/G) emission intensity ratio is subdivided into traditional (650 to 545 nm) and new (650 to 560 nm) R/G ones. As the doped Mn2+ ions increase, these two R/G ratios are in lockstep with the same tunable trends at low excitation intensity, but the tunable regions become different at high excitation intensity. Moreover, we demonstrate that the energy transfer (ET) between Mn2+ and Er3+ contributes to the adjustment of R/G ratio and leads to tunable multicolor of the single microrod. The spectroscopic properties and tunable color from the single microrod can be potentially utilized in color display and micro-optoelectronic devices.

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“…To the best of our knowledge, the most used way for the enhancement is based on the fabrication of the core/shell structure, or the increase of the NPs size. [10][11] Herein, we propose a simple way to improve the single red band UC luminescence intensity of KMnF3:Yb 3+ /Er 3+ by introducing Mg 2+ ions into the initial reaction solution. The experimental results of the UC luminescence intensity spectrum and the UC luminescence decay curves show the upconversion fluorescence intensity changes along with the variation of the doping concentration of Mg 2+ ions.…”

Section: Introductionmentioning

confidence: 99%

Enhancing single red band upconversion luminescence of KMnF3:Yb3+/Er3+ nanocrystals by Mg2+ doping

Huang

Gao

et al. 2017

Journal of Alloys and Compounds

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In this work, monodisperse Mg 2+ doped KMnF3:Yb 3+ /Er 3+ nanoparticles (NPs) are prepared via a fast solvothermal method. With the excitation of 980 nm laser diode, a brightly single red upconversion (UC) luminescence can be observed from KMnF3:Yb 3+ /Er 3+ NPs, which is further improved by introducing Mg 2+ ions. Moreover, the single red UC fluorescence intensity of the KMnF3:Yb 3+ /Er 3+ NPs co-doped with 30 mol% Mg 2+ ions is enhanced by 20.8 times compared to that of Mg 2+ ions-absent sample. Besides, the TEM measurement of the 30 mol% Mg 2+ doped KMnF3:Yb 3+ /Er 3+ NPs shows a biocompatible ultra-small crystal size (about 10 nm). All results indicate that Mg 2+-doped is an effective method to significantly improve the UC single-red light of KMnF3:Yb 3+ /Er 3+ , which shows great potential application in vivo bioimaging.

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KMnF₃:Yb³⁺,Er³⁺@KMnF₃:Yb³⁺ active-core–active-shell nanoparticles with enhanced red up-conversion fluorescence for polymer-based waveguide amplifiers operating at 650 nm

Abstract: We demonstrated optical amplification at 650 nm in KMnF3:Yb3+,Er3+@KMnF3:Yb3+ nanoparticles doped polymer waveguides for the first time.

Cited by 39 publications

References 37 publications

Synthesis and Application in Anticounterfeiting of RGB Upconversion Nanoparticles

Synthesis and Application in Anticounterfeiting of RGB Upconversion Nanoparticles

Revisiting the Enhanced Red Upconversion Emission from a Single β-NaYF4:Yb/Er Microcrystal By Doping with Mn2+ Ions

Enhancing single red band upconversion luminescence of KMnF3:Yb3+/Er3+ nanocrystals by Mg2+ doping

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