Effect of temperature on luminescence and VUV to visible conversion in the YAl3(BO3)4:Dy3+ (YAB:Dy) crystal

Dominiak‐Dzik, G.; Ryba‐Romanowski, W.; Kovács, László; Береги, Э.

doi:10.1016/j.radmeas.2004.03.015

Cited by 32 publications

(15 citation statements)

References 7 publications

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“…The decay-time of Dy 3þ emission is fast ð84 msÞ and this of the Tb 3þ emission is longer (4.5 ms). The fluorescence lifetime of the 4 F 9=2 emitting level of Dy 3þ is shorter than the usual value found in literature which is in the order of several hundreds of microseconds [9]. This is in agreement with a Dy 3þ !…”

Section: Vacuum Ultravioletsupporting

confidence: 87%

Energy transfers between dysprosium and terbium in

Beauzamy

Moine

Gredin

2007

Journal of Luminescence

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Section: Vacuum Ultravioletsupporting

confidence: 87%

Energy transfers between dysprosium and terbium in

Beauzamy

Moine

Gredin

2007

Journal of Luminescence

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“…This is quite unique in rare earth doped materials, as so-called temperature quenching was expected to be observed. However, observed tendency is similar to the reported for Dy:YAB [11]. The authors note that there seems to be a specific behavior for dysprosium doped materials and explain the phenomenon by significantly different values of the rates of transitions from Stark components of 4 F 9∕2 level.…”

supporting

confidence: 82%

Blue emissions in Dy^3+ doped Y_4Al_2O_9 crystals for temperature sensing

Boruc¹,

Kaczkan²,

Fetliński³

et al. 2012

Opt. Lett.

118

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Temperature dependent emission spectra and decay times of trivalent dysprosium (Dy3) activated Y4Al2O9 (YAM) crystals have been studied for the first time (to our knowledge). The ratio of emission lines intensity can be used in temperature measurements, as it is not dependent on the variability of absolute intensity. The Boltzmann model was applied for modeling the temperature variation of the 4I15/2 and 4F9/2 states emissions relative intensities 455 and 481 nm, respectively. The calculated approximation gives highest sensor sensitivity of about 3×10(-3)°C-1 for the 600°C-800°C range, which allows for an expectation of usefulness of Dy3+:YAM in high-temperature luminescence thermometry. Also, the measured decay times are suitable for temperature sensing.

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“…The values vary from 2.0-2.5 ms. The values are comparatively long compared to lifetimes observed for YF 3 :Dy (1.0 ms, [32] ), YAB:Dy (0.5 ms, [33] ), PbX 2 :Dy (0.4 ms, X = Br, Cl, F, [24] ) or fluorogermanate glasses (0.3 ms, [34] ). Longer lifetimes for nanocrystalline luminescent materials compared to the bulk materials have been observed before and represent one of the main size-induced properties in insulating compounds.…”

Section: Excited-state Lifetimesmentioning

confidence: 71%

Ionic Liquid‐Assisted Route to Nanocrystalline Single‐Phase Phosphors for White Light‐Emitting Diodes

Lorbeer

Mudring

2013

ChemSusChem

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White light-emitting diodes represent the future generation of domestic and public lighting, substituting the currently favored (compact) fluorescent lamps. Research on improving the performance and costs leads to a focus on processing constraints. The optimization of the grain size is judged to be an important tool for minimizing the necessary amount of (expensive rare-earth containing) phosphors. Using only one type of phosphor that emits white light instead of a mixture of three phosphors (one for blue, green, and red, respectively) will significantly improve the characteristics of future light-emitting diodes. Small, 6-8 nm-sized particles emit intense white light observable by the naked eye. The emission color has been studied by varying the dopant ion concentrations as well as the excitation wavelengths, yielding white light close to standard daylight.

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Effect of temperature on luminescence and VUV to visible conversion in the YAl3(BO3)4:Dy3+ (YAB:Dy) crystal

Cited by 32 publications

References 7 publications

Energy transfers between dysprosium and terbium in

Energy transfers between dysprosium and terbium in

Blue emissions in Dy^3+ doped Y_4Al_2O_9 crystals for temperature sensing

Ionic Liquid‐Assisted Route to Nanocrystalline Single‐Phase Phosphors for White Light‐Emitting Diodes

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