Synthesis of intense red light-emitting β-Ca2SiO4:Eu3+ phosphors for near UV-excited light-emitting diodes utilizing agro-food waste materials

Priya, Ruby; Khurana, Ishita; Pandey, O. P.

doi:10.1007/s10854-019-02710-1

Cited by 15 publications

(5 citation statements)

References 64 publications

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“…Urbach energy ( E u ) for the samples is calculated by the following expression:

α ()(, ν) goodbreak= α_{o} \exp ()(, \frac{italichν}{E_{u}})

where α o is a constant and E u is Urbach energy indicating the width of band tails of localised states representing degree of disorder. The E u values are calculated from the linear portion of the curve between ln( α ) against hν [10]. The calculated values of E u for G1, G3 and G5 samples are 0.5765, 0.3367 and 0.4985 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…All the reagents, phosphorus(V) oxide (P 2 O 5 ), Na 2 O and Eu 2 O 3 , used for the preparation of bioactive glasses are obtained from Sigma‐Aldrich of 99.99% purity and utilised without further purification. CaO is obtained from the eggshells by the procedure followed in the literature [10]. Dulbecco's modified eagle medium (DMEM) cell culture media, foetal bovine serum (FBS) and penicillin–streptomycin were purchased from HiMedia, India.…”

Section: Methodsmentioning

confidence: 99%

“…CaO is obtained from the eggshells by the procedure followed in the literature [10]. Dulbecco's modified eagle medium (DMEM) cell culture media, foetal bovine serum (FBS) and penicillin-streptomycin were purchased from HiMedia, India.…”

Section: Methodsmentioning

confidence: 99%

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Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Priya,

Kaur,

Attri

et al. 2023

Luminescence

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In this article, we have reported the effect of varying concentration of europium (Eu) in (50 − x)% P2O5–25% Na2O–24% CaO–% Eu2O3, where x = 1, 3, 5. The glass samples were synthesised via conventional melt‐quench method. The impact of europium ion (Eu3+) on the structural, optical and luminescent properties of phosphate soda lime glasses has been studied using X‐ray diffraction (XRD), Fourier‐transformed infrared (FTIR) spectroscopy, ultraviolet‐visible spectroscopy, scanning electron microscopy coupled with energy‐dispersive spectroscopy and photoluminescent techniques. The amorphous nature of glass samples was confirmed by XRD patterns. FTIR confirmed the presence of various functional groups. The emission spectra of synthesised samples exhibited intense emission peaks corresponding to Eu3+ under excitation at 393 nm. Among all the peaks, the maximum intensity was observed for 5D0 → 7F2 transition. Judd–Ofelt (J–O) parameters (Ω2, Ω4) and other radiative parameters such as band width, radiative transition probabilities, stimulated emission cross‐sections and branching ratio were determined from emission spectra. The other photometric parameters such as CIE coordinates and colour purity were also determined. Furthermore, cytotoxic studies were carried out on normal cell line human embryonic kidney cells (HEK‐293) using MTT assay. Results showed that the prepared samples significantly enhanced growth in glass sample‐treated cells as compared to control cells. These findings suggest that synthesised glass samples are biocompatible in nature and have potential for applications in display devices and biomedical research area.

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“…Urbach energy ( E u ) for the samples is calculated by the following expression:

α ()(, ν) goodbreak= α_{o} \exp ()(, \frac{italichν}{E_{u}})

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Priya,

Kaur,

Attri

et al. 2023

Luminescence

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“…According to this theory, if the R C value is 5 Å or less, the exchange interaction leads to nonradiative transfer and a value of R C greater than 5 Å, leads to multipole–multipole interactions. [ 36 ] According to Blasse's equation, the critical distance R C is given by the formula:

R_{C} goodbreak= 2 {[\frac{3 V}{4 italicπN x_{C}}]}^{\frac{1}{3}}

where V is the volume of unit cell, x C refers to the critical doping concentration and N is the number of available sites for activator in the host. For SrY 2 O 4 :9 mol% Eu 3+ , V = 409.37 Å 3 , x C = 0.09, and N = 8, which results in a critical distance of 10.28 Å.…”

Section: Resultsmentioning

confidence: 99%

“…According to this theory, if the R C value is 5 Å or less, the exchange interaction leads to nonradiative transfer and a value of R C greater than 5 Å, leads to multipole-multipole interactions. [36] According to Blasse's equation, the critical distance R C is given by the formula:…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

Structural and luminescence studies of titanium co‐doped SrY₂O₄:Eu phosphors

et al. 2022

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Here, europium-doped (1 to 11 mol%) and titanium (1 to 5 mol%)co-doped SrY 2 O 4 : Eu phosphors were synthesized using solid-state reaction method. The synthesized samples were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL) techniques for structural, morphological, functional group, and photoluminescence studies, respectively. XRD patterns confirmed the formation of pure phase SrY 2 O 4 at 1300 C and structural parameters were further determined using Rietveld refinement. FESEM micrographs revealed that doped and co-doped samples had different morphological features. All the samples were excited at ultraviolet light excitation and emission spectra consisted of peaks corresponding to the Eu ions. The maximum PL intensity was observed for 9 mol% of Eu ions and 3 mol% codoping of Ti ions. The synthesized phosphors have potential applications in optoelectronics and display devices.

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Red Emitting Phosphors for Display and Lighting Applications

Raj¹,

Rao²

2023

Progress in Optical Science and Photonics

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Synthesis of intense red light-emitting β-Ca2SiO4:Eu3+ phosphors for near UV-excited light-emitting diodes utilizing agro-food waste materials

Cited by 15 publications

References 64 publications

Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Structural and luminescence studies of titanium co‐doped SrY₂O₄:Eu phosphors

Red Emitting Phosphors for Display and Lighting Applications

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Synthesis of intense red light-emitting β-Ca2SiO4:Eu3+ phosphors for near UV-excited light-emitting diodes utilizing agro-food waste materials

Cited by 15 publications

References 64 publications

Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Structural, luminescent and in vitro studies of europium‐doped soda lime phosphate glasses

Structural and luminescence studies of titanium co‐doped SrY2O4:Eu phosphors

Red Emitting Phosphors for Display and Lighting Applications

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Product

Resources

About

Structural and luminescence studies of titanium co‐doped SrY₂O₄:Eu phosphors