Europium doped Sr<sub>2</sub>YNbO<sub>6</sub> double perovskite phosphor for photoluminescence and thermoluminescence properties

Degda, Naresh; Patel, Nimesh; Verma, Vishwnath; Srinivas, M.; Murthy, K. V. R.; Haranath, D.

doi:10.1002/bio.4438

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…The colour purity of the emitted red light was calculated using the following equation [49]:

Color purity goodbreak= \frac{\sqrt{{((), x_{s} goodbreak- x_{i})}^{2} + {((), y_{s} goodbreak- y_{i})}^{2}}}{\sqrt{{((), x_{d} goodbreak- x_{i})}^{2} + {((), y_{d} goodbreak- y_{i})}^{2}}} goodbreak\times 100 %

where ( x s , y s ) and ( x i , y i ) are the CCC of the sample and the CIE white illumination point (0.3333, 0.3333), respectively, and ( x d , y d ) is the CCC of the dominant wavelength. The colour purity of all the calculated BLT:Mn 4+ samples was >97%.…”

Section: Resultsmentioning

confidence: 99%

“…F I G U R E 8 Energy level transition of Mn 4+ ions in the octahedron. The colour purity of the emitted red light was calculated using the following equation [49]: where (x s , y s ) and (x i , y i ) are the CCC of the sample and the CIE white illumination point (0.3333, 0.3333), respectively, and (x d , y d ) is the CCC of the dominant wavelength. The colour purity of all the calculated BLT:Mn 4+ samples was >97%.…”

Section: Dependence Of Emission Intensity On Temperaturementioning

confidence: 99%

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Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Li,

Ye,

Cui

et al. 2023

Luminescence

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A series of Mn4+‐doped and Mn4+,K+‐co‐doped Ba2LaTaO6 (BLT) double‐perovskite phosphors was synthesized using a high‐temperature solid‐state reaction. The phase purity and luminescence properties were also studied. The optimum doping concentration of Mn4+ and K+ was obtained by investigating the photoluminescence excitation spectra and photoluminescence emission spectra. The comparison of BLT:Mn4+ phosphors with and without K+ ions shows that the photoluminescence intensity of K+‐doped phosphors was greatly enhanced. This is because there was a charge difference when Mn4+ ions were doped with Ta5+ ions in BLT. Mn4+–K+ ion pairs were formed after doping K+ ions, which hinders the nonradiative energy transfer between Mn4+ ions. Therefore, the luminescence intensity, quantum yield, and thermal stability of phosphors were enhanced. The electroluminescence spectra of BLT:Mn4+ and BLT:Mn4+,K+ were measured. The spectra showed that the light emitted from the phosphors corresponded well with chlorophyll a and phytochrome PR. The results show that the BLT:Mn4+,K+ phosphors had good luminescence properties and application prospects and are ideal materials for plant‐illuminated red phosphors.

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“…The colour purity of the emitted red light was calculated using the following equation [49]:

Color purity goodbreak= \frac{\sqrt{{((), x_{s} goodbreak- x_{i})}^{2} + {((), y_{s} goodbreak- y_{i})}^{2}}}{\sqrt{{((), x_{d} goodbreak- x_{i})}^{2} + {((), y_{d} goodbreak- y_{i})}^{2}}} goodbreak\times 100 %

Section: Resultsmentioning

confidence: 99%

Section: Dependence Of Emission Intensity On Temperaturementioning

confidence: 99%

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Li,

Ye,

Cui

et al. 2023

Luminescence

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“…The inset in Figure 9 shows excellent linear dose–response with ionizing radiation, which indicates that the generation of defect centres increases progressively with beta dose. The result obtained from the dose–response study indicates that the phosphor under study was the best candidate to be incorporated into TL dosimeters [46].…”

Section: Resultsmentioning

confidence: 99%

Luminescence and dosimetry approach in terbium(III)‐activated tungstate double perovskite

Degda,

Patel,

Verma

et al. 2023

Luminescence

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A series of tungstate double perovskite Ca3WO6 doped with Tb3+ was prepared by a combustion process using urea as a flux. The crystal structure identification of Ca3WO6:Tb3+ phosphors was done using X‐ray diffraction patterns, and a monoclinic structure was discovered. The Fourier transform infrared spectrum of Ca3WO6:Tb3+ displayed characteristic vibrations of tungstate bonds. Under 278 nm excitation, Ca3WO6:Tb3+ exhibited intense downconversion green emission, which corresponded to the 5D4–7FJ (J = 4,5) transitions of Tb3+. The phosphor exhibited the highest photoluminescence (PL) intensity when it was doped with 1 mol% of Tb3+; later intensity quenching appeared to be due to the multipolar interaction at higher dopant concentrations. Moreover, high‐quality thermoluminescence (TL) was detected when phosphors were irradiated using beta rays. The effects of Tb3+ concentration and beta dose on TL intensity were the two major aspects studied in detail. The TL intensity demonstrated excellent linear response to the applied range of beta dose. The trap parameters of the studied phosphors were computed by the peak shape approach and glow curve deconvolution. The fading effect on TL intensity was studied by recording the TL glow curves after 1 month of beta irradiation. Obtained results from the PL and TL characterizations showed that the phosphors under study have the potential to be used in lighting displays and in thermoluminescence dosimetry.

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Thermally stable luminescence and dosimetric features of Ho(III) activated tungstate double perovskite

Degda,

Patel,

Singhal

et al. 2024

Journal of Luminescence

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Europium doped Sr₂YNbO₆ double perovskite phosphor for photoluminescence and thermoluminescence properties

Cited by 7 publications

References 56 publications

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Luminescence and dosimetry approach in terbium(III)‐activated tungstate double perovskite

Thermally stable luminescence and dosimetric features of Ho(III) activated tungstate double perovskite

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Europium doped Sr2YNbO6 double perovskite phosphor for photoluminescence and thermoluminescence properties

Cited by 7 publications

References 56 publications

Phosphors Ba2LaTaO6:Mn4+ and its alkali metal charge compensation for plant growth illumination

Phosphors Ba2LaTaO6:Mn4+ and its alkali metal charge compensation for plant growth illumination

Luminescence and dosimetry approach in terbium(III)‐activated tungstate double perovskite

Thermally stable luminescence and dosimetric features of Ho(III) activated tungstate double perovskite

Contact Info

Product

Resources

About

Europium doped Sr₂YNbO₆ double perovskite phosphor for photoluminescence and thermoluminescence properties

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination