Polyspectral white light emission from Eu3+, Tb3+, Dy3+, Tm3+ co-doped GdAl3(BO3)4 phosphors obtained by combustion synthesis

Fuchs, Elmar; Sommer, Christian; Wenzl, Franz P.; Bitschnau, Brigitte; Paulitsch, Astrid; Mühlanger, Andreas; Gatterer, Karl

doi:10.1016/j.mseb.2008.11.024

Cited by 84 publications

(24 citation statements)

References 30 publications

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“…6 shows the CIE (1931) chromaticity co-ordinates of LuAG:Ce 3+ nano-garnet from 25 to 150 • C under 460 nm excitation. The color co-ordinates at RT are estimated as x = 0.3455, y = 0.5298, correspond to correlated color temperature (CCT) of 5258 K which is nearer to that of the day light (5500 K) [49]. These color coordinates are very useful in determining the exact emission color of the sample.…”

Section: Resultsmentioning

confidence: 99%

Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet

Praveena

Shi

Jang

et al. 2011

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet

Praveena

Shi

Jang

et al. 2011

Journal of Alloys and Compounds

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“…5). ( 4f 9 ) shows three emission peaks (485nm, 570nm and a less intense red emission around 660nm) which can in principle lead to white emission, though with a poor color rendering [106]. The red emission of Sm 3+ ( 4f 5 ) is characterized by several emission peaks at approximately 560, 600, 650 and 700nm, in combination with a 4f-4f excitation peak around 405nm [107,108].…”

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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“…[34], fluorescent tube (3937K) [35], YAG+blue chips [36]; higher than that of tungsten lamp (2836 K) [35]; and especially very close to the ideal CCT value of warm white light (3000 K) [8]. Besides, the CCT values are much lower than many other Dy 3+ doped compounds, such as some fluoride, tungstate, borate, and silicate [20][21][22][23][24][25][26].…”

Section: Cie Coordinates and Cct Valuesmentioning

confidence: 86%

Crystal Growth and Luminescence Properties of Dy3+ and Ge4+ Co-Doped Bi4Si3O12 Single Crystals for High Power Warm White LED

et al. 2017

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Φ1 inch Dy 3+ and Ge 4+ co-doped bismuth silicate (Bi 4 Si 3 O 12 , BSO) single crystals with the length of 80-100 mm were successfully grown by Bridgman method. They are transparent, free of cracks and inclusions. The white residual at the top parts of BSO crystals disappears with co-doping 1 mol% Dy 3+ and more than 3 mol% Ge 4+ . The FWHM values of X-ray rocking curves shows 1%Dy,3%Ge:BSO crystal possesses high crystallization quality. The intrinsic emission peak of BSO and the characteristic emission peaks of Dy 3+ ions are weakened with increasing the doping concentration of Ge 4+ . 1 mol% Dy 3+ and 3 mol% Ge 4+ are the optimal concentrations due to high crystallization quality and moderate emission intensity. The CIE coordinates and CCT values shift towards warmer white light region with increased Ge 4+ co-doping. The CCT values are close to the ideal value of 3000 K for warm white light when 1%Dy,3%Ge:BSO crystal is excited by various UV light. Increasing the temperature from 298 K to 573 K leads the luminescence lifetime to decrease from 659 µs to 645 µs. More than 95% and 80% photoluminescence intensity at room temperature is still retained at 423 K and 573 K respectively. Dy,Ge:BSO crystals are potential candidates for fabricating high power warm WLEDs.

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Polyspectral white light emission from Eu3+, Tb3+, Dy3+, Tm3+ co-doped GdAl3(BO3)4 phosphors obtained by combustion synthesis

Cited by 84 publications

References 30 publications

Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet

Sol–gel synthesis and thermal stability of luminescence of Lu3Al5O12:Ce3+ nano-garnet

Selecting Conversion Phosphors for White Light-Emitting Diodes

Crystal Growth and Luminescence Properties of Dy3+ and Ge4+ Co-Doped Bi4Si3O12 Single Crystals for High Power Warm White LED

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