The Experts below are selected from a list of 28233 Experts worldwide ranked by ideXlab platform
Qufu Wei - One of the best experts on this subject based on the ideXlab platform.
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warm toned sio2 red emitting color converter sral2o4 eu2 dy3 luminous fibers with variable and color tuned luminescence on the basis of Radiative Energy Transfer and color conversion
Journal of Luminescence, 2019Co-Authors: Zhi Chen, Lei Luo, Qufu WeiAbstract:Abstract Considerable potential application stimulates the exploration of new ways to prepare warm-toned multicolor luminous fibers. However, most of the previous attempts failed. Radiative Energy Transfer (RET) and color conversion enable the preparation of multicolor luminous fibers with warm-toned luminescence. In this work, a series of warm-toned luminous fibers with variable and color-tuned luminescence was obtained using SiO2/red-emitting coumarin color converter (RECC)@SrAl2O4:Eu2+, Dy3+ (SAOED) long-lasting phosphorescent composites as the luminescence materials on the basis of the RET and color conversion from SAOED to RECC. The surface and cross morphologies, phase structure, photoluminescence emission spectra, CIE-1931 chromaticity coordinates, luminescence images, and afterglow properties of the luminous fibers were characterized. Results showed that the luminescent color of the luminous fibers can turn from yellowish-green to red by adjusting the RECC concentration used to prepare SiO2/RECC@SAOED and shifted toward red gradually in darkness with the decay of luminescence. The afterglow lifetime of the luminous fibers can sustain up to 7719 s when the RECC concentration was 0.2%. The luminescence mechanism of the luminous fibers was also discussed. The results will be substantially beneficial for multicolor luminous fiber preparation.
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Warm-toned SiO2/red-emitting color converter@SrAl2O4:Eu2+, Dy3+ luminous fibers with variable and color-tuned luminescence on the basis of Radiative Energy Transfer and color conversion
Journal of Luminescence, 2019Co-Authors: Zhi Chen, Lei Luo, Qufu WeiAbstract:Abstract Considerable potential application stimulates the exploration of new ways to prepare warm-toned multicolor luminous fibers. However, most of the previous attempts failed. Radiative Energy Transfer (RET) and color conversion enable the preparation of multicolor luminous fibers with warm-toned luminescence. In this work, a series of warm-toned luminous fibers with variable and color-tuned luminescence was obtained using SiO2/red-emitting coumarin color converter (RECC)@SrAl2O4:Eu2+, Dy3+ (SAOED) long-lasting phosphorescent composites as the luminescence materials on the basis of the RET and color conversion from SAOED to RECC. The surface and cross morphologies, phase structure, photoluminescence emission spectra, CIE-1931 chromaticity coordinates, luminescence images, and afterglow properties of the luminous fibers were characterized. Results showed that the luminescent color of the luminous fibers can turn from yellowish-green to red by adjusting the RECC concentration used to prepare SiO2/RECC@SAOED and shifted toward red gradually in darkness with the decay of luminescence. The afterglow lifetime of the luminous fibers can sustain up to 7719 s when the RECC concentration was 0.2%. The luminescence mechanism of the luminous fibers was also discussed. The results will be substantially beneficial for multicolor luminous fiber preparation.
C.k. Jayasankar - One of the best experts on this subject based on the ideXlab platform.
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Blue–green cooperative upconverted luminescence and Radiative Energy Transfer in Yb3+-doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.
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blue green cooperative upconverted luminescence and Radiative Energy Transfer in yb3 doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.
P. Babu - One of the best experts on this subject based on the ideXlab platform.
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Blue–green cooperative upconverted luminescence and Radiative Energy Transfer in Yb3+-doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.
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blue green cooperative upconverted luminescence and Radiative Energy Transfer in yb3 doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.
Zhi Chen - One of the best experts on this subject based on the ideXlab platform.
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warm toned sio2 red emitting color converter sral2o4 eu2 dy3 luminous fibers with variable and color tuned luminescence on the basis of Radiative Energy Transfer and color conversion
Journal of Luminescence, 2019Co-Authors: Zhi Chen, Lei Luo, Qufu WeiAbstract:Abstract Considerable potential application stimulates the exploration of new ways to prepare warm-toned multicolor luminous fibers. However, most of the previous attempts failed. Radiative Energy Transfer (RET) and color conversion enable the preparation of multicolor luminous fibers with warm-toned luminescence. In this work, a series of warm-toned luminous fibers with variable and color-tuned luminescence was obtained using SiO2/red-emitting coumarin color converter (RECC)@SrAl2O4:Eu2+, Dy3+ (SAOED) long-lasting phosphorescent composites as the luminescence materials on the basis of the RET and color conversion from SAOED to RECC. The surface and cross morphologies, phase structure, photoluminescence emission spectra, CIE-1931 chromaticity coordinates, luminescence images, and afterglow properties of the luminous fibers were characterized. Results showed that the luminescent color of the luminous fibers can turn from yellowish-green to red by adjusting the RECC concentration used to prepare SiO2/RECC@SAOED and shifted toward red gradually in darkness with the decay of luminescence. The afterglow lifetime of the luminous fibers can sustain up to 7719 s when the RECC concentration was 0.2%. The luminescence mechanism of the luminous fibers was also discussed. The results will be substantially beneficial for multicolor luminous fiber preparation.
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Warm-toned SiO2/red-emitting color converter@SrAl2O4:Eu2+, Dy3+ luminous fibers with variable and color-tuned luminescence on the basis of Radiative Energy Transfer and color conversion
Journal of Luminescence, 2019Co-Authors: Zhi Chen, Lei Luo, Qufu WeiAbstract:Abstract Considerable potential application stimulates the exploration of new ways to prepare warm-toned multicolor luminous fibers. However, most of the previous attempts failed. Radiative Energy Transfer (RET) and color conversion enable the preparation of multicolor luminous fibers with warm-toned luminescence. In this work, a series of warm-toned luminous fibers with variable and color-tuned luminescence was obtained using SiO2/red-emitting coumarin color converter (RECC)@SrAl2O4:Eu2+, Dy3+ (SAOED) long-lasting phosphorescent composites as the luminescence materials on the basis of the RET and color conversion from SAOED to RECC. The surface and cross morphologies, phase structure, photoluminescence emission spectra, CIE-1931 chromaticity coordinates, luminescence images, and afterglow properties of the luminous fibers were characterized. Results showed that the luminescent color of the luminous fibers can turn from yellowish-green to red by adjusting the RECC concentration used to prepare SiO2/RECC@SAOED and shifted toward red gradually in darkness with the decay of luminescence. The afterglow lifetime of the luminous fibers can sustain up to 7719 s when the RECC concentration was 0.2%. The luminescence mechanism of the luminous fibers was also discussed. The results will be substantially beneficial for multicolor luminous fiber preparation.
Inocencio R. Martín - One of the best experts on this subject based on the ideXlab platform.
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Blue–green cooperative upconverted luminescence and Radiative Energy Transfer in Yb3+-doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.
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blue green cooperative upconverted luminescence and Radiative Energy Transfer in yb3 doped tungsten tellurite glass
Journal of Luminescence, 2016Co-Authors: P. Babu, Inocencio R. Martín, G. Venkataiah, Vemula Venkatramu, Víctor Lavín, C.k. JayasankarAbstract:Abstract Ytterbium-doped tungsten tellurite glasses have been prepared and studied their cooperative upconverted luminescence and Radiative Energy Transfer properties. In a 3.0 mol% Yb 2 O 3 -doped glass, near-infrared emission band is peaked at around 977 nm with a full width at half maximum of around 15 nm. This glass emits blue–green upconverted emission under 980 nm excitation due to cooperative processes involving two interacting Yb 3+ ions. The upconverted emission band is centered at around 502 nm with a bandwidth of around 45 nm. Power dependence of cooperative emission intensity and the temporal evolutions of the near-infrared and blue–green emissions confirm the presence of cooperative luminescence. Photoluminescence and lifetimes have been measured by moving the laser excitation from one edge of the sample and found that Radiative Energy Transfer is predominant in 3.0 mol% of Yb 2 O 3 -doped glass. The absorption coefficient obtained from absorption spectrum is in good agreement with that obtained by fitting the curve of luminescence intensity versus distance from the edge of the sample.