Synthesis, structural and luminescence studies of LiSrVO4:Sm3+ nanophosphor to fill amber gap in LEDs under n-UV excitation

Biswas, Pankaj; Kumar, Vinay; Padha, Naresh; Swart, H.C.

doi:10.1007/s10854-016-6294-3

Cited by 22 publications

(6 citation statements)

References 31 publications

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“…The sample peaks under various doping concentrations were found to be consistent and no miscellaneous peaks were observed. The diffraction patterns were ascribed to a monoclinic structure with P 2/m space group [16] and matched the JCPDS no. 53-1242 card that shows that Pr 3+ ions in the place of Sr 2+ ions had a negligible influence on the crystal structure.…”

Section: Phase Morphological and Elemental Analysissupporting

confidence: 59%

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Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Mala,

Albert,

Princy

et al. 2024

Luminescence

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Warm red‐emitting praseodymium‐doped LiSrVO4 phosphors were synthesized via solid‐state reaction. The phase formation was verified using an X‐ray diffraction study and the morphology was investigated using a scanning electron microscope study. The LiSrVO4:Pr3+ phosphors emitted red light when exposed to ultraviolet light, indicating their possibility for use in warm white light‐emitting diodes (WLEDs). Furthermore, the effect of charge compensators on the luminescence characteristics was addressed. The decay time was investigated using time‐resolved photoluminescence. Furthermore, thermal quenching was analyzed through temperature‐dependent photoluminescence spectra. Their sensitivity was calculated using temperature‐dependent decay time analysis. The colour purity of the emitted light could be measured by photometric analysis. This comprehensive investigation provides a thorough understanding of the luminescence properties of phosphors for WLED applications.

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Section: Phase Morphological and Elemental Analysissupporting

confidence: 59%

“…The material crystallinity was computed by calculating its Urbach energy. The absorption coefficient (α) and the Urbach energy were correlated by an empirical relationship [16,23]. The slope of the curve was obtained from Figure 5 and the reciprocal of the slope gave an Urbach energy of 136.4 meV.…”

Section: Optical Propertiesmentioning

confidence: 99%

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Mala,

Albert,

Princy

et al. 2024

Luminescence

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“…Vanadate compounds are widely used matrices for luminescent rare earth (RE) ions dopants as they satisfy high efficiency of excitation of activator through the matrix. A wide range of possible applications of vanadate nanoparticles have attracted significant research efforts to development of new vanadate compositions with improved characteristics depending on requirements of various practical tasks (Zhu et al, 2018;Chornii et al, 2016;Biswas et al, 2017;Venkatesan et al, 2018;. Studying the Eu 3+ -activated LaVO 4 vanadate nanoparticles, we have achieved increase of emission intensity in 10 times using various synthesis conditions (Chukova et al, 2013(Chukova et al, , 2015(Chukova et al, , 2018.…”

Section: Introductionmentioning

confidence: 88%

“…Development of composite films with oxide nanoparticles have attracted increased research interest in relation with their applications for optical material science needs, in particular, such materials are used for downshifting of short wavelength part of spectra of incident light to the rage of spectral sensitivity of silicon solar cells and for transformation of violet and blue LED radiation into white light (Ende et al, 2009;Lewis and Nocera, 2006;Nakajima et al, 2008;Biswas et al, 2017). Currently, the most commercially-used white LEDs include luminescent converters based on the YAG:Ce particles dispersed in a polymeric (silicon) matrix (Tucureanu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

et al. 2020

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Thin films from the L VO 4 :Eu,Ca nanoparticles were successfully grown by pulsed laser deposition method on glass and silicon substrates for the first time. Morphology and thickness of the films depend on a type of substrate and a number of pulses. The films are of 27-220 nm thickness and formed by very small particles (up to 20 nm) and also can contain single nanoparticles with dimensions 40-60 nm and sometimes agglomerates of nanoparticles. Spectral properties of the samples have been investigated and discussed. The vanadate films deposited on the silicon substrates lead to appearance of antireflection properties in the visible range. Luminescence spectra of the investigated films consist of narrow lines caused by f-f transitions in the Eu 3+ ions. For the samples on glass substrates the wide bands of glass emission are also contributed to the spectra. The optimal experimental conditions those allowed to obtain films promising for applications as luminescent converters are considered.

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“…For such purpose, Sm 3+ ions can be considered as the most promising luminescent activator after the Eu 3+ ions. Emission spectra of the Sm 3+ ions are usually observed in the 550 -700 nm range and can be excited from the 370 -500 nm range with inner f-f transitions [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Structure and spectroscopy characterization of La1-xSmxVO4 luminescent nanoparticles synthesized co-precipitation and sol-gel methods

et al. 2019

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The Sm-activated orthvanadate nanoparticles with La 1-x Sm x VO 4 (x ≤ 0.3) composition were synthesized by co-precipitation and sol-gel methods. XRD study has shown that synthesized samples are characterized by monoclinic or tetragonal structure as well as their mixture dependently on Sm concentration and methods of synthesis. Influence of method of synthesis on morphology of nanoparticles, their absorption, diffuse reflectance and emission spectra was observed and studied. Luminescence properties and diffuse reflectance spectra of the sol-gel nanoparticles are also depend on Sm concentrations. At least two types of Sm 3+ centers were found by emission spectra. These centers have different excitation efficiency by light from the 350-450 nm spectral range. Structures of the centers are discussed taking into account crystal structure, possible defects, morphology of the synthesized nanoparticles and their phase compositions.

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Synthesis, structural and luminescence studies of LiSrVO4:Sm3+ nanophosphor to fill amber gap in LEDs under n-UV excitation

Cited by 22 publications

References 31 publications

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

Structure and spectroscopy characterization of La1-xSmxVO4 luminescent nanoparticles synthesized co-precipitation and sol-gel methods

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Synthesis, structural and luminescence studies of LiSrVO4:Sm3+ nanophosphor to fill amber gap in LEDs under n-UV excitation

Cited by 22 publications

References 31 publications

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO4:Pr3+ phosphors

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO4:Pr3+ phosphors

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

Structure and spectroscopy characterization of La1-xSmxVO4 luminescent nanoparticles synthesized co-precipitation and sol-gel methods

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Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors