Energy structure and fluorescence of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in ZnS:Eu nanoparticles

Chen, Wei; Malm, Jan‐Olle; Zwiller, Valéry; Huang, Yining; Liu, Shuman; Wallenberg, L. Reine; Bovin, Jan‐Olov; Samuelson, Lars

doi:10.1103/physrevb.61.11021

Cited by 170 publications

(106 citation statements)

References 10 publications

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“…Recently, strenuous efforts have been made to solve this problem by doping RE ions in semiconductor particles such as ZnS, CdS and TiO 2 , through sol-gel processing or the co-precipitation method. [3][4][5][6][7][8] The characteristic emission of RE ions has been observed from some of the doped semiconductors. However, Bol, Beek, and Meijerink reported 8 that RE ions are mostly adsorbed at the particle surface in these doped semiconductors and the characteristic emission of RE ions is not due to the energy absorbed by the host but RE ions themselves.…”

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confidence: 99%

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Xin

Wang

et al. 2004

Applied Physics Letters

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Fluorescent semiconductor materials doped with rare earth ions have been synthesized by flocculation of colloidal titania nanosheets, Ti0.91O2, with Eu3+ or Tb3+ ions. The composites had a lamellar structure with a gallery height of 1.06nm, accommodating rare earth ions between the nanosheets with a doping concentration as high as 10±1mol%. The composite with Eu3+ exhibited intense characteristic emission from Eu3+ either by exciting the Ti0.91O2 host with UV light (λ<350nm) or by directly exciting Eu3+ at a longer wavelength where there was no absorption by Ti0.91O2. This indicates that nonradiative energy transfer from the Ti0.91O2 host to Eu3+ can take place in this system. In contrast, no energy transfer was observed in the composite with Tb3+.

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confidence: 99%

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Xin

Wang

et al. 2004

Applied Physics Letters

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“…Nano-structured optical materials have attracted great attention due to their potential applications in high-performance photonic and bio-photonic fields [1][2][3]. Among these materials, rare earth (RE) doped nanomaterials are widely investigated due to excellent luminescence characteristics arising from 4f-4f transitions [2], giving rise to long luminescence lifetimes and low absorptions, which have clear advantages in applications of lasers, optical amplifiers and phosphors [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Among these materials, rare earth (RE) doped nanomaterials are widely investigated due to excellent luminescence characteristics arising from 4f-4f transitions [2], giving rise to long luminescence lifetimes and low absorptions, which have clear advantages in applications of lasers, optical amplifiers and phosphors [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Upconverting Ho–Yb doped titanate nanotubes

et al. 2012

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The synthesis of Ho 3 + -Yb 3 + codoped titanate nanotubes was carried out successfully via a hydrothermal treatment method from a precursor powder. These novel nanotubes treated at RT, 100°C and 280°C were studied with the aim of determining their structural and optical properties. As the thermal treatment was increased, their upconversion emission becomes stronger. This behavior was related to reduction of hydroxyl groups and the water on the surface, which resulted in changes in the interlayer distances of the nanotubes.

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“…12, various dopants result in different emission bands such as the orange luminescence in ZnS:Mn nanoparticles attributed to 4 T 1 -6 A 1 transition of Mn 2+ ions, and the green emission from the characteristic 4f 6 5d 1 -4f 7 transition of Eu 2+ in ZnS:Eu QDs. 9,13,14 Quantum confinement can affect the band structure of doped QDs and the relative energy levels of the dopants. The excited states of Eu 2+ can be moved into the band gap of ZnS by quantum confinement effect.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of Eu2+ and Eu3+ doped ZnS quantum dots and their photovoltaic and magnetic properties

et al. 2016

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Eu-doped ZnS quantum dots (QDs) have been synthesized by wet-chemical method and found to form in zinc blende (cubic) structure. Both Eu2+ and Eu3+ doped ZnS can be controllably synthesized. The Eu2+ doped ZnS QDs show broad photoluminescence emission peak around 512 nm, which is from the Eu2+ intra-ion transition of 4f6d1 – 4f7, while the Eu3+ doped samples exhibit narrow emission lines characteristic of transitions between the 4f levels. The investigation of the magnetic properties shows that the Eu3+ doped samples exhibit signs of ferromagnetism, on the other hand, Eu2+ doped samples are paramagnetic of Curie-Weiss type. The incident photon to electron conversion efficiency is increased with the Eu doping, which suggests the QD solar cell efficiency can be enhanced by Eu doping due to widened absorption windows. This is an attractive approach to utilize benign and environmentally friendly wide band gap ZnS QDs in solar cell technology.

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Energy structure and fluorescence ofEu2+in ZnS:Eu nanoparticles

Cited by 170 publications

References 10 publications

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Photoluminescence properties of lamellar aggregates of titania nanosheets accommodating rare earth ions

Upconverting Ho–Yb doped titanate nanotubes

Controlled synthesis of Eu2+ and Eu3+ doped ZnS quantum dots and their photovoltaic and magnetic properties

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