Luminescence properties of Ce-activated YAG optical ceramic scintillator materials

Zych, Eugeniusz; Brecher, C.; Wojtowicz, A.J.; Lingertat, H.

doi:10.1016/s0022-2313(97)00103-8

Cited by 192 publications

(96 citation statements)

References 14 publications

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“…It concerns the samples doped with cerium as well as the samples doped with cerium and magnesium. The obtained decay constant being equal to 65 ns is characteristic of the Ce 3 + luminescence [3,4]. The measured decays are presented in Fig.…”

Section: Resultsmentioning

confidence: 82%

Photoluminescence Kinetics of YAG Crystals Activated with Ce, and Ce and Mg

Barzowska¹,

Kubicki²,

Grinberg

et al. 1999

Acta Phys. Pol. A

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A basic spectroscopic measurements of luminescence, absorption, luminescence excitation spectra and emission kinetic measurements on YAG crystals activated with cerium and magnesium are presented. We report that the Ce3+ luminescence decay constant, at 65 ns, is independent of Ce concentrations (from 0.05 to 0.2%) and that it does not change with the presence or absence of the Mg co-dopant. Nevertheless, we find that under pulsed laser excitation at 290 nm the rise time in Ce luminescence time profiles is effectively shorter in the Mg co-doped samples.

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Section: Resultsmentioning

confidence: 82%

Photoluminescence Kinetics of YAG Crystals Activated with Ce, and Ce and Mg

Barzowska¹,

Kubicki²,

Grinberg

et al. 1999

Acta Phys. Pol. A

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“…YAG:Ce 3+ was initially introduced by Blasse and Bril as phosphor for flying-spot cathode ray tubes, due to its short decay time [132] and for similar reasons also studied as scintillation phosphor [83].…”

Section: +mentioning

confidence: 99%

Selecting Conversion Phosphors for White Light-Emitting Diodes

Smet

Parmentier

Poelman

2011

J. Electrochem. Soc.

703

501

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Light emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu AbstractLight emitting diodes (LEDs) are on the verge of a breakthrough in general lighting, due to their rapidly improving efficiency. Currently, white LEDs with high color rendering are mainly based on wavelength conversion by one or more phosphor materials. This Review first describes how to quantify the quality of a light source, discussing the color rendering index (CRI) and alternative color quality indices. Then, six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs. These criteria deal with the shape and position of the emission and the excitation spectra, the thermal quenching behavior, the quantum efficiency, the chemical and thermal stability and finally with the occurrence of saturation effects. Based on these criteria, the most common dopant ions (broad-band emitting Eu

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“…Usually OC are obtained from initial row powders with small grain size [1,2] or from sintered YAG-based nanopowders [3,4] previously prepared by sol-gel methods [4][5][6]. The main differences of the properties of YAG-based OC in comparison with SC can be the relatively lower temperature of preparation of OC (about 1700-1750 1C) [1][2][3][4][5][6] than that for YAG:Ce SC obtained by melting at high (1970 1C) temperature by the Czochralski or modified Bridgman methods [7]. Therefore, OC can possess, in principle, lower concentration of Y Al antisite defects (AD), which are typical for melt-grown YAG-based SC [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%