Enhancement of up-conversion luminescence in Zn2SiO4:Yb3+, Er3+ by co-doping with Li+ or Bi3+

Jiang, Liang; Xiao, Siguo; Yang, Xiaoliang; Ding, Jian; Dong, Kai

doi:10.1007/s00340-012-4986-9

Cited by 44 publications

(29 citation statements)

References 40 publications

(37 reference statements)

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“…289,290 Hao and co-workers reported another intriguing manner to tailor the local symmetry of Ln 3+ in ferroelectric BaTiO 3 :Yb,Er, where Er 3+ ions are noncentrosymmetric in the lattice ( Figure 17b). 291 When applying an external electric field along the direction of spontaneous polarization, the lattice elongated and promoted the asymmetry of the BaTiO 3 host, leading to lower symmetry around Er 3+ ions.…”

Section: Efficiency Enhancement Of Upconversion Emissionsmentioning

confidence: 96%

Lanthanide Nanoparticles: From Design toward Bioimaging and Therapy

et al. 2015

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Section: Efficiency Enhancement Of Upconversion Emissionsmentioning

confidence: 96%

Lanthanide Nanoparticles: From Design toward Bioimaging and Therapy

et al. 2015

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“…Similar strategy is also frequently reported for UC nanoparticles. For example, a small amount of Bi 3+ (1–4 mol%) in β‐NaYF 4 :Yb 3+ ,Ln 3+ (Ln 3+ = Er 3+ , Tm 3+ and Ho 3+ ) nanocrystals results in significantly enhanced (≈10–36‐fold) UC emission intensity …”

Section: Tailoring Up‐conversion Intensitymentioning

confidence: 99%

Up‐Conversion Fluorescent Labels for Plastic Recycling: A Review

Gao

Turshatov

Howard

et al. 2017

Advanced Sustainable Systems

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The world's plastic production reached 269 million tons p.a. in 2015. The EU fraction of this was 50 million tons, with 40% of this attributed to product packaging. [1] Even though packaging exhibits the highest recycling rate for any plastic product, this recycling rate in the EU is less than 40%. [1,2] Overall, 29.7% of the plastic within the EU was recycled, with the remainder either burnt for energy recovery (39.5%) or dumped in landfills (30.8%). Recently adopted EU legislative proposals on waste management put pressure on the industry to find solutionsThe demand for more efficient and complete sorting techniques for plastic waste is growing, and one possible solution isbased on fluorescent labeling. Novel fluorescent labels based on trivalent lanthanide (Ln 3+ ) activated inorganic up-conversion (UC) materials offer a promising technological solution for plastic recycling. UC is a nonlinear, anti-Stokes process of combining two or more low energy near-infrared (NIR) photons to obtain the emission of a single higher energy photon. While Ln 3+ based UC materials possess one key disadvantage -low quantum yield, they also exhibit many unique features, such as high signal/noise ratio, tailored emission color, long photoluminescent lifetime, and low toxicity. These unique features endear them for a diverse range of applications and offer many new opportunities. Herein, we review the recent advances in the Ln 3+ activated inorganic micro-sized UC materials from the perspective of tailoring UC emission color and intensity for plastic recycling applications.

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“…However, compared with conventional luminescence materials, weak luminescence intensity of UC nano/micro-crystals is still the main limitation for their practical applications. In recent years, various methods have been developed to improve the luminescence intensity, such as surface plasmon of metal nanoparticles, crystal surface coating and core/shell synthesis [8][9][10][11]. However, it is still a challenge for researchers to obtain nano/micro-crystals with high UC luminescence intensity.…”

Section: Introductionmentioning

confidence: 99%