Plasmonic enhanced upconversion luminescence of β-NaYF4:Yb3+/Er3+ with Ag@SiO2 core–shell nanoparticles

Ding, Yanli; Zhang, Xiaodan; Gao, Han; Xu, Shengzhi; Wei, Changchun; Zhao, Ying

doi:10.1016/j.jlumin.2013.10.062

Cited by 37 publications

(15 citation statements)

References 21 publications

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“…Also, there are three-photon upconversion processes, resulting in blue emission and also contributing to the green and red emission20. However, our PL spectra show that the three-photon processes make much smaller contributions than the two-photon processes and are therefore omitted in our analysis253233.…”

Section: Resultsmentioning

confidence: 94%

Experimental demonstration of plasmon enhanced energy transfer rate in NaYF4:Yb3+,Er3+ upconversion nanoparticles

Mao

Cho

et al. 2016

Sci Rep

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Energy transfer upconversion (ETU) is known to be the most efficient frequency upconversion mechanism. Surface plasmon can further enhance the upconversion process, opening doors to many applications. However, ETU is a complex process involving competing transitions between multiple energy levels and it has been difficult to precisely determine the enhancement mechanisms. In this paper, we report a systematic study on the dynamics of the ETU process in NaYF4:Yb3+,Er3+ nanoparticles deposited on plasmonic nanograting structure. From the transient near-infrared photoluminescence under various excitation power densities, we observed faster energy transfer rates under stronger excitation conditions until it reached saturation where the highest internal upconversion efficiency was achieved. The experimental data were analyzed using the complete set of rate equations. The internal upconversion efficiency was found to be 56% and 36%, respectively, with and without the plasmonic nanograting. We also analyzed the transient green emission and found that it is determined by the infrared transition rate. To our knowledge, this is the first report of experimentally measured internal upconversion efficiency in plasmon enhanced upconversion material. Our work decouples the internal upconversion efficiency from the overall upconverted luminescence efficiency, allowing more targeted engineering for efficiency improvement.

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Section: Resultsmentioning

confidence: 94%

Experimental demonstration of plasmon enhanced energy transfer rate in NaYF4:Yb3+,Er3+ upconversion nanoparticles

Mao

Cho

et al. 2016

Sci Rep

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“…After absorbing positively charged PAH on the surface by self‐assembly, the negative gold NPs were attached on the surface or used as seeds for further formation of the gold nanoshell. The UC luminescence intensity was enhanced 2.6 folds by attaching with gold NPs owing to local field enhancement and surface plasmon‐coupled emission effects . In comparison, the formation of a gold shell can significantly suppress the emission because of considerable scattering of excitation irradiation.…”

Section: Effects Of Polymers In Synthesis and Surface Modification Ofmentioning

confidence: 99%

Synthesis and Application of Nanohybrids Based on Upconverting Nanoparticles and Polymers

Cheng

Lin

2015

Macromol. Rapid Commun.

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Lanthanide-doped upconversion nanoparticles (UCNPs) have been an emerging and exciting research field in recent years due to their unique luminescent properties of converting near-infrared light to shorter wavelength radiation. UCNPs offer excellent prospects in luminescent labeling, displays, bioimaging, bioassays, drug delivery, sensors, and anticounterfeiting applications. Along with the abundant studies and rapid progress in this area, UCNPs are promising to be a new class of luminescent probe owing to their special advantages over the conventional organic dyes and quantum dots. Among them, polymers play an important role to improve properties or endow new function of UCNPs such as for matrix materials, water solubility, linking active targeting molecules, biocompatibility, and stimuli-responsive behavior. This article briefly reviews the compositions, optical mechanisms, architectures of upconversion nanocrystals and highlights the works on various functional UCNPs/polymer nanohybrids as well as many new interesting fruits in applications.

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“…The radius of the inner silica core, silver shell, and outer silica shell were r 1 , r 2 , and r 3 , respectively. Gain materials such as dye molecules [5], quantum dots [12], rare-earth ions [20], and semiconductors [25] can be chosen to amplify the SP via stimulated emission under optical pumping. The refractive indices of the silica core and outer silica shell are set at n silica = Fig.…”

Section: Structures and Principlesmentioning

confidence: 99%

“…As a matter of fact, the symmetric core-shell nanoparticles (NPs) can be easily synthesized than asymmetric core-shell NPs. For instance, silver core-shell NPs [19,20] and gold core-shell NPs [21] have been synthesized by pure chemical method, respectively. Furthermore, the silver core-shell NPs have demonstrated their distinct optoelectronic properties and realized some important applications, such as biosensors [1] and biological detection [22].…”

Section: Introductionmentioning

confidence: 99%

Quadrupole Plasmon Lasers with a Super Low Threshold Based on an Active Three-Layer Nanoshell Structure

Song

Niu

et al. 2015

Plasmonics

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An active three-layer silica-silver-silica nanoshellbased plasmon laser with a super low threshold is proposed. Using the finite element method, the optical cross-sections of the core-shell nanoparticle with different gain levels were calculated and the gain thresholds of the nanoparticle-based plasmon lasers fueled by different plasmon modes were determined. The calculation results indicated that when quadrupole plasmon oscillations excited in nanoshell structures were used as the lasing mode, the gain threshold of the plasmonic laser dropped by 87 % compared with that of a conventional plasmon laser with a dipole mode. By optimizing the structural parameters of the layered nanoshell, an extremely low threshold (~0.0133) over a wider resonant range of wavelength tunings was obtained. The underlying physics of low-threshold surface plasmon amplification was explained by investigating the Q factor, the mode volume, the Purcell factor, and the optical field confinement and enhancement associated with the lasing mode.

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Plasmonic enhanced upconversion luminescence of β-NaYF4:Yb3+/Er3+ with Ag@SiO2 core–shell nanoparticles

Cited by 37 publications

References 21 publications

Experimental demonstration of plasmon enhanced energy transfer rate in NaYF4:Yb3+,Er3+ upconversion nanoparticles

Experimental demonstration of plasmon enhanced energy transfer rate in NaYF4:Yb3+,Er3+ upconversion nanoparticles

Synthesis and Application of Nanohybrids Based on Upconverting Nanoparticles and Polymers

Quadrupole Plasmon Lasers with a Super Low Threshold Based on an Active Three-Layer Nanoshell Structure

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