Quantum confinement in rare-earth doped semiconductor systems

Kenyon, Anthony J.

doi:10.1016/s1359-0286(03)00043-3

Cited by 29 publications

(9 citation statements)

References 62 publications

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“…These results indicate that the Er 3+ ions occupy well-defined locations in the La 2 Zr 2 O 7 lattice, namely, those of La 3+ ions . They also indicate that the erbium-containing A 2 B 2 O 7 nanocrystals are promising luminescent materials for optoelectronics and bioanalyses. , …”

Section: Resultsmentioning

confidence: 70%

“…38 They also indicate that the erbium-containing A 2 B 2 O 7 nanocrystals are promising luminescent materials for optoelectronics and bioanalyses. 39,40 In addition, the pump-power dependence of the PL was studied by taking the integrated photoluminescent intensity of the as-synthesized La 2 Zr 2 O 7 nanocrystals with a relatively low erbium doping concentration, i.e., (La 0.95 Er 0.05 ) 2 Zr 2 O 7 nanocrystals, from 1420 to 1630 nm as a function of the laser pump power from 30 min to 1.5 W (Figure 5). Figure 5a indicates that the emission peaks do not shift as the excitation power changes.…”

Section: Resultsmentioning

confidence: 99%

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Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

et al. 2009

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This work focuses on the synthesis of nanocrystals with A 2 B 2 O 7 composition (in this study, A ) La, Er, or their mixture, B ) Zr, Hf, or their mixture), their structural characterization, and luminescent property measurements. It was necessary to utilize a single-source complex precursor A(OH) 3 • BO(OH) 2 • nH 2 O to synthesize these A 2 B 2 O 7 nanocrystals, by the synergistic interplay between the reduction of the transport distances of the reactive constituents to an atomic length scale and the enhanced diffusion of the reactants in the molten salt medium. This process is highly generalizable for the preparation of other complex oxide nanocrystals. Moreover, these nanocrystals possess outstanding luminescent properties, including strong photoluminescence in the infrared region, efficient pump-power dependence and excellent cathodoluminescence. These desirable properties make these nanocrystals promising for applications in display, bioanalysis, lighting, scintillating, and telecommunications.

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Section: Resultsmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

et al. 2009

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“…Thus, the quantum confinement effect was observed for the extremely small Eu 3+doped CaMoO 4 nanocrystals, which is beneficial to obtaining highly luminescent Eu 3+ -doped CaMoO 4 nanocrystals. [14] To investigate the effects of Eu 3+ doping concentration on the photoluminescence performance of Eu 3+ -doped CaMoO 4 nanocrystals, a series of Ca 1-x MoO 4 :Eu 3+ xnanocrystals with different Eu 3+ doping concentrations (x = 0.01, 0.025, 0.05, 0.10, 0.15, 0.25 and 0.40) were synthesized. For comparison, the corresponding Ca 1-x MoO 4 :Eu 3+ x bulk phosphors with different Eu 3+ doping concentrations were also prepared by a high-temperature solid-state method at 800 °C for 4 h. The PLQY values of the bulk phosphors and the corresponding nanocrystals were obtained under excitation at the 290 nm.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the quantum confinement effect was observed for the extremely small Eu 3+ ‐doped CaMoO 4 nanocrystals, which is beneficial to obtaining highly luminescent Eu 3+ ‐doped CaMoO 4 nanocrystals. [ 14 ]…”

Section: Resultsmentioning

confidence: 99%

An Ultrafast and Room‐Temperature Strategy for Kilogram‐Scale Synthesis of Sub‐5 nm Eu³⁺‐doped CaMO₄ Nanocrystals with a Photoluminescence Quantum Yield Exceeding 85%

Liu

Shi

Cao

et al. 2023

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Rare earth‐doped metal oxide nanocrystals have a high potential in display, lighting, and bio‐imaging, owing to their excellent emission efficiency, superior chemical, and thermal stability. However, the photoluminescence quantum yields (PLQYs) of rare earth‐doped metal oxide nanocrystals have been reported to be much lower than those of the corresponding bulk phosphors, group II‐VI, and halide‐based perovskite quantum dots because of their poor crystallinity and high‐concentration surface defects. Here, an ultrafast and room‐temperature strategy for the kilogram‐scale synthesis of sub‐5 nm Eu3+‐doped CaMoO4 nanocrystals is presented, and this reaction can be finished in 1 min under ambient conditions. The absolute PLQYs for sub‐5 nm Eu3+‐doped CaMoO4 nanocrystals can reach over 85%, which are comparable to those of the corresponding bulk phosphors prepared by the high‐temperature solid state reaction. Moreover, the as‐produced nanocrystals exhibit a superior thermal stability and their emission intensity unexpectedly increases after sintering at 600 °C for 2 h in air. 1.9 kg of Eu3+‐doped CaMoO4 nanocrystals with a PLQY of 85.1% can be obtained in single reaction.

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“…In general, the nano-sized particles have a number of potential advantages over conventional micron-sized powders [7,8]. For instance, quantum confinement effect in nanocrystalline materials may result in enhancement of their luminescent intensity [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation and luminescence properties of LaPO4:Er,Yb nanoparticles

Jung

Seok

et al. 2005

Journal of Luminescence

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Quantum confinement in rare-earth doped semiconductor systems

Cited by 29 publications

References 62 publications

Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

An Ultrafast and Room‐Temperature Strategy for Kilogram‐Scale Synthesis of Sub‐5 nm Eu³⁺‐doped CaMO₄ Nanocrystals with a Photoluminescence Quantum Yield Exceeding 85%

Preparation and luminescence properties of LaPO4:Er,Yb nanoparticles

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Quantum confinement in rare-earth doped semiconductor systems

Cited by 29 publications

References 62 publications

Luminescent Nanocrystals with A2B2O7 Composition Synthesized by a Kinetically Modified Molten Salt Method

Luminescent Nanocrystals with A2B2O7 Composition Synthesized by a Kinetically Modified Molten Salt Method

An Ultrafast and Room‐Temperature Strategy for Kilogram‐Scale Synthesis of Sub‐5 nm Eu3+‐doped CaMO4 Nanocrystals with a Photoluminescence Quantum Yield Exceeding 85%

Preparation and luminescence properties of LaPO4:Er,Yb nanoparticles

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Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

Luminescent Nanocrystals with A₂B₂O₇ Composition Synthesized by a Kinetically Modified Molten Salt Method

An Ultrafast and Room‐Temperature Strategy for Kilogram‐Scale Synthesis of Sub‐5 nm Eu³⁺‐doped CaMO₄ Nanocrystals with a Photoluminescence Quantum Yield Exceeding 85%