Photoluminescence and structural analysis of trivalent europium doped MLaAl3O7 (M = Ba, Ca, Mg and Sr) nanophosphors

The solution combustion technique was used to synthesize MLaAl3O7 (M = Ba, Ca, Mg, and Sr) nanophosphors‐doped with Eu3+ using metal nitrates as precursors. The photoluminescence (PL) emission spectra exhibited three peaks at 587–591, 610–616, and 653–654 corresponding to 5D0→7F1, 5D0→7F2, and 5D0→7...

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Veröffentlicht in:Luminescence (Chichester, England) England), 2020-08, Vol.35 (5), p.673-683
Hauptverfasser: Kadyan, Sonika, Singh, Kuldeep, Singh, Sitender, Sheoran, Suman, Singh, Jasbir, Singh, Devender
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container_title Luminescence (Chichester, England)
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creator Kadyan, Sonika
Singh, Kuldeep
Singh, Sitender
Sheoran, Suman
Singh, Jasbir
Singh, Devender
description The solution combustion technique was used to synthesize MLaAl3O7 (M = Ba, Ca, Mg, and Sr) nanophosphors‐doped with Eu3+ using metal nitrates as precursors. The photoluminescence (PL) emission spectra exhibited three peaks at 587–591, 610–616, and 653–654 corresponding to 5D0→7F1, 5D0→7F2, and 5D0→7F3 transitions, respectively. Upon excitation at 254 nm, these nanophosphors displayed strong red emission with the dominant peak attributed to the 5D0→7F2 transition of Eu3+. The materials were further heated at 900 and 1050°C for 2 h to examine the consequence of temperature on crystal lattice and PL emission intensity. X‐ray diffraction (XRD) analysis proved that all the synthesized materials were of a crystalline nature. CaLaAl3O7 material has a tetragonal crystal structure with space group P421m. Scherer's equation was used to calculate the crystallite size of synthesized phosphors using XRD data. A Fourier transformation infrared study was used to observe the stretching vibrations of metal–oxygen bonds. Infrared peaks for stretching vibrations corresponding to lanthanum–oxygen and aluminium–oxygen bonds were found at 582 and 777 cm–1 respectively for CaLaAl3O7 phosphor material. Transmission electron microscopy images were used to determine the size of particles (18–37 nm for the as‐prepared materials) and also to analyze the three‐dimensional view of these materials. The experimental data indicate that these materials may be promising red‐emitting nanophosphors for use in white light‐emitting diodes.
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The photoluminescence (PL) emission spectra exhibited three peaks at 587–591, 610–616, and 653–654 corresponding to 5D0→7F1, 5D0→7F2, and 5D0→7F3 transitions, respectively. Upon excitation at 254 nm, these nanophosphors displayed strong red emission with the dominant peak attributed to the 5D0→7F2 transition of Eu3+. The materials were further heated at 900 and 1050°C for 2 h to examine the consequence of temperature on crystal lattice and PL emission intensity. X‐ray diffraction (XRD) analysis proved that all the synthesized materials were of a crystalline nature. CaLaAl3O7 material has a tetragonal crystal structure with space group P421m. Scherer's equation was used to calculate the crystallite size of synthesized phosphors using XRD data. A Fourier transformation infrared study was used to observe the stretching vibrations of metal–oxygen bonds. Infrared peaks for stretching vibrations corresponding to lanthanum–oxygen and aluminium–oxygen bonds were found at 582 and 777 cm–1 respectively for CaLaAl3O7 phosphor material. Transmission electron microscopy images were used to determine the size of particles (18–37 nm for the as‐prepared materials) and also to analyze the three‐dimensional view of these materials. 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Infrared peaks for stretching vibrations corresponding to lanthanum–oxygen and aluminium–oxygen bonds were found at 582 and 777 cm–1 respectively for CaLaAl3O7 phosphor material. Transmission electron microscopy images were used to determine the size of particles (18–37 nm for the as‐prepared materials) and also to analyze the three‐dimensional view of these materials. 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The photoluminescence (PL) emission spectra exhibited three peaks at 587–591, 610–616, and 653–654 corresponding to 5D0→7F1, 5D0→7F2, and 5D0→7F3 transitions, respectively. Upon excitation at 254 nm, these nanophosphors displayed strong red emission with the dominant peak attributed to the 5D0→7F2 transition of Eu3+. The materials were further heated at 900 and 1050°C for 2 h to examine the consequence of temperature on crystal lattice and PL emission intensity. X‐ray diffraction (XRD) analysis proved that all the synthesized materials were of a crystalline nature. CaLaAl3O7 material has a tetragonal crystal structure with space group P421m. Scherer's equation was used to calculate the crystallite size of synthesized phosphors using XRD data. A Fourier transformation infrared study was used to observe the stretching vibrations of metal–oxygen bonds. Infrared peaks for stretching vibrations corresponding to lanthanum–oxygen and aluminium–oxygen bonds were found at 582 and 777 cm–1 respectively for CaLaAl3O7 phosphor material. Transmission electron microscopy images were used to determine the size of particles (18–37 nm for the as‐prepared materials) and also to analyze the three‐dimensional view of these materials. The experimental data indicate that these materials may be promising red‐emitting nanophosphors for use in white light‐emitting diodes.</abstract><cop>Bognor Regis</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/bio.3772</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-2180-5049</orcidid></addata></record>
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source Wiley Online Library Journals Frontfile Complete
subjects Aluminium
Aluminum
Barium
Calcium
combustion method
Crystal lattices
Crystal structure
Crystallites
Crystals
Dimensional analysis
Electron microscopy
Emission analysis
Emission spectra
Emissions
Europium
Fourier analysis
Fourier transform infrared
Fourier transforms
Image transmission
Lanthanum
Luminescence
Magnesium
Metal nitrates
Metals
MLaAl3O7:Eu3
Nanophosphors
Nitrates
Oxygen
Phosphors
Photoluminescence
Photons
Stretching
Strontium
Structural analysis
Synthesis
Transmission electron microscopy
transmission electron microscopy and white light‐emitting diodes
Vibrations
White light
X-ray diffraction
title Photoluminescence and structural analysis of trivalent europium doped MLaAl3O7 (M = Ba, Ca, Mg and Sr) nanophosphors
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