Photoluminescence and thermoluminescence investigations of Ca3B2O6: Sm3+phosphor

Manhas, M.; Kumar, Vinay; Ntwaeaborwa, O.M.; Swart, H.C.

doi:10.1088/2053-1591/2/7/075008

Cited by 29 publications

(7 citation statements)

References 33 publications

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“…These CIE chromaticity coordinates were calculated based on their PL spectrum, and the results are shown on Table 2 with CCT. The correlated color temperature can be estimated by following McCamy empirical formula 27,33 :where n equals (x − x e )/(y − y e ), and the chromaticity epicenter (x e , y e ) is (0.3320,0.1858). All of CCT of CLSO apatite phosphors are over 5000 K, which is boundary temperature, CCT of white light emission less than 5000 K named warn white light used for household lighting or appliances and conversely clod white light more suitable for commercial application for lighting purposes.…”

Section: Resultsmentioning

confidence: 99%

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

Liu

Mei

Liao

et al. 2019

Sci Rep

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What ideal w-LED phosphors always aim to do is to achieve a single phase near-sunlight emission phosphor simultaneously with both high luminescence efficiency and high thermal stability at operation temperature. And It is well known that apatite compound phosphors are one of the most promising optical materials to realize those above because of their unique structure enhanced luminescence properties and thermal stability. Here, we synthesized a co-doped single phase apatite phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ (CLSO:Dy3+/Sm3+) for white light emission, which was provided with excellent thermal stability and of which luminescence intensity at 150 °C still was 92 percentage of that at room temperature. Moreover, X-ray diffraction technique, Fourier transform infrared spectroscopy, scanning electron microscope were employed to characterization of phase structure and morphology, and consequently pure apatite structure and gravel-like morphology of phosphors were proved. Analysis of photoluminescence spectra indicated that concentration quenching effect exist in single-doped CLSO:Dy3+ phosphors owing to dipole-dipole interaction between Dy3+ ions. It is revealed that maybe exist Dy3+ ↔ Sm3+ bilateral non-radiative energy transfer processes in Dy3+/Sm3+ co-doped CLSO system by PL spectra and decay curves. And variation of Sm3+ ion concentration can control color emission, namely CIE chromaticity coordinates and correlated color temperature, finally to achieve white light emission (0.309,0.309) with CCT 6848 K, able to be a potential candidate for commercial lighting applications.

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Section: Resultsmentioning

confidence: 99%

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

Liu

Mei

Liao

et al. 2019

Sci Rep

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“…Among them, borate has drawn much attention since they merit in superior stability, low cost, and low synthesis temperature . In particular, Ca 3 B 2 O 6 phosphors doped with lanthanide ions were reported to exhibit good luminescence characteristics . Mohit Manhas et al investigated photoluminescence properties of Ca 3 B 2 O 6 :Tb 3+ nanophosphors .…”

Section: Introductionmentioning

confidence: 99%

“…The Ca 3 B 2 O 6 :Tb 3+ nanophosphors can be used as an excellent candidate for the practical applications as a scintillator. Vinay Kumar et al studied the photoluminescence and thermoluminescence properties of Ca 3 B 2 O 6 :Sm 3+ phosphor . The structural, luminescence, and optical properties of the phosphors are investigated.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16] In particular, Ca 3 B 2 O 6 phosphors doped with lanthanide ions were reported to exhibit good luminescence characteristics. [17][18][19][20][21][22] Mohit Manhas et al investigated photoluminescence properties of Ca 3 B 2 O 6 :Tb 3+ nanophosphors. 17 The phosphors were synthesized by a combustion method.…”

Section: Introductionmentioning

confidence: 99%

“…Vinay Kumar et al studied the photoluminescence and thermoluminescence properties of Ca 3 B 2 O 6 :Sm 3+ phosphor. 18 The structural, luminescence, and optical properties of the phosphors are investigated. They found that the dipolequadrupole interaction is the major mechanism for concentration quenching of the Sm 3+ ion in Ca 3 B 2 O 6 host.…”

Section: Introductionmentioning

confidence: 99%

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Dy and Eu activated Ca₃B₂O₆ phosphors for near ultraviolet‐based light‐emitting diodes

et al. 2018

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The Dy‐ and Eu‐activated Ca3B2O6 phosphors were synthesized by a high‐temperature solid‐state reaction technique and their structural and luminescent properties were investigated. The phosphors are characterized by X‐ray diffraction, photoluminescence spectra, and Commission International de I'Eclairage (CIE) chromaticity coordinates. It is found that the charge compensator Na+ plays an important role in modifying the emission spectral profiles of Dy and Eu ions in the phosphors. The ratio of the emission located at the yellow wavelength portion to that located at the blue wavelength region of the Dy3+ ions can be apparently tuned by changing the Na+ content. The luminescence intensity of the phosphors can be enhanced with introducing Na+ ions as well. The emission colors of Dy/Eu codoped phosphors change from blue to white and successfully acquire the superior white light emission (x = 0.330, y = 0.329) by appropriately tuning the Na+/Dy3+ content and the excitation wavelength. The energy transfer process from Eu2+ to Dy3+ and Eu3+ occurs in the Dy/Eu codoped phosphors, providing a further approach to modify the emission spectral profile of the examined phosphors. The phosphors presented here have promising applications in the fields of light‐emitting diodes.

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Study of luminescence from terbium doped strontium borate nanophosphors in PMMA

et al. 2021

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Photoluminescence and thermoluminescence investigations of Ca₃B₂O₆: Sm³⁺phosphor

Cited by 29 publications

References 33 publications

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

Dy and Eu activated Ca₃B₂O₆ phosphors for near ultraviolet‐based light‐emitting diodes

Study of luminescence from terbium doped strontium borate nanophosphors in PMMA

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Photoluminescence and thermoluminescence investigations of Ca3B2O6: Sm3+phosphor

Cited by 29 publications

References 33 publications

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

Dy and Eu activated Ca3B2O6 phosphors for near ultraviolet‐based light‐emitting diodes

Study of luminescence from terbium doped strontium borate nanophosphors in PMMA

Contact Info

Product

Resources

About

Photoluminescence and thermoluminescence investigations of Ca₃B₂O₆: Sm³⁺phosphor

Dy and Eu activated Ca₃B₂O₆ phosphors for near ultraviolet‐based light‐emitting diodes