The role of traps in the blue–green emission of ZrO2:Ce3+, Tb3+ co-doped phosphors

Ahemen, I.; Dejene, F.B.

doi:10.1007/s10854-017-8126-5

Cited by 18 publications

(8 citation statements)

References 50 publications

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“…This leads to an expansion of unit cell and the size effect. Clearly, the positions of main diffraction peaks of Cedoped CdS were shifted to higher angle because the ionic radius of Ce 3+ ion (1.14 Å [17][18][19][20]) is larger than that of Cd 2+ ion (1.03 Å [21,22]). The unit cell parameters are a = 4.1388 Å and c = 6.7125 Å for pure CdS sample and a = 6.7125 Å and c = 6.6666 Å for the 3% Ce-doped CdS sample.…”

Section: Resultsmentioning

confidence: 98%

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

PHURUANGRAT¹,

SAKHON²,

THONGTEM³

et al. 2021

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Visible-light-driven Ce-doped CdS nanowires were synthesized by a solvothermal method. Phase and morphology of Ce-doped CdS nanowires were investigated by XRD and SEM analyses. The analytical results certified that both CdS and Ce-doped CdS samples were uniform pure phase of hexagonal CdS nanowires. The photocatalytic activities of CdS and Ce-doped CdS nanowires were investigated through the photodegradation of rhodamine B (RhB) under visible light irradiation. The 3% Ce-doped CdS nanowires have the highest photocatalytic efficiency of 95.75% within 120 min and are the promising material used for wastewater treatment.

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Section: Resultsmentioning

confidence: 98%

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

PHURUANGRAT¹,

SAKHON²,

THONGTEM³

et al. 2021

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“…The broad emission observed at high energy is attributed to either triplet ligand emission reflecting inefficient energy transfer to the lanthanide ion or population of an emissive midgap trap state arising from an oxygen vacancy ( V ox ) in the ZnAl 2 O 4 lattice. − On the basis of time-resolved measurements, in SI Figure 3 it is believed that the broad emission is due to the V ox midgap state population since a roll-over feature is observed followed by a decay of 872 ns at 298 K, which is faster than that typically observed for a 3 π* emission. , Consistent with this assumption, the lifetime for triplet emission of β-diketonate Gd(III) coordination complexes is on the order of 1.0 μs at 298 K, − while V ox show lifetimes of 500 to 800 ns at 298 K. , …”

Section: Resultsmentioning

confidence: 99%

Breaking Latva’s Rule by Energy Hopping in a Tb(III):ZnAl₂O₄ Nanospinel

et al. 2019

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Latva’s empirical rule states that the energy separation between a molecular sensitizer and a lanthanide ion excited state must lie within 2000 to 4000 cm–1 for optimal energy transfer. At energies below 2000 cm–1, back energy transfer will impact the process resulting in the reduction of the photoluminescence quantum yield (PLQY). The role of excited triplet state (3π*) energy and intralanthanide ion energy hopping is assessed for a series of β-diketonate molecular sensitizers coordinated to the surface of a 2 nm 3.56% Tb(III):ZnAl2O4 nanospinel. It is observed that energy transfer from the β-diketonate to a 2 nm nanospinel lies within the critical radii for energy transfer and the presence of efficient energy hopping minimizes back energy transfer contributions. In contradiction to Latva’s rule, the highest PLQY of 39% is achieved following sensitization by hexafluoroacetylacetonate, with an energy difference (3π*-5D4) of only 1534 cm–1. The measured PLQY is consistent with other reports of Tb(III) doped nanocrystal hosts lattices, suggesting that energy hopping within the lattice enhances the Tb(III) phosphor performance. Although not measured, the energy gap plot suggests that a PLQY approaching 58% may be achievable by ligand design.

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“…The results also showed the successful formation of composite samples through the integration or substitution of larger atoms by smaller atoms in the lattice. [72][73][74][75][76][77]…”

Section: Xrd Analysismentioning

confidence: 99%

Highly efficient and stable AgI–CdO nanocomposites for photocatalytic and antibacterial activity

et al. 2023

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The role of traps in the blue–green emission of ZrO2:Ce3+, Tb3+ co-doped phosphors

Cited by 18 publications

References 50 publications

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

Breaking Latva’s Rule by Energy Hopping in a Tb(III):ZnAl₂O₄ Nanospinel

Highly efficient and stable AgI–CdO nanocomposites for photocatalytic and antibacterial activity

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The role of traps in the blue–green emission of ZrO2:Ce3+, Tb3+ co-doped phosphors

Cited by 18 publications

References 50 publications

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

PREPARATION AND CHARACTERIZATION OF VISIBLE-LIGHT-DRIVEN Ce-DOPED CdS NANOWIRES FOR PHOTODEGRADATION OF RHODAMINE B

Breaking Latva’s Rule by Energy Hopping in a Tb(III):ZnAl2O4 Nanospinel

Highly efficient and stable AgI–CdO nanocomposites for photocatalytic and antibacterial activity

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Breaking Latva’s Rule by Energy Hopping in a Tb(III):ZnAl₂O₄ Nanospinel