Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $
Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3}...
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Gespeichert in:
| Autor*in: |
Singh, D. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer Science+Business Media New York 2016 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of materials science / Materials in electronics - Springer US, 1990, 28(2016), 3 vom: 05. Nov., Seite 2462-2470 |
|---|---|
| Übergeordnetes Werk: |
volume:28 ; year:2016 ; number:3 ; day:05 ; month:11 ; pages:2462-2470 |
| Links: |
|---|
| DOI / URN: |
10.1007/s10854-016-5819-0 |
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| Katalog-ID: |
OLC2026316465 |
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| 520 | |a Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. | ||
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| 700 | 1 | |a Suryanarayana, N. S. |4 aut | |
| 700 | 1 | |a Shrivastava, R. |4 aut | |
| 700 | 1 | |a Dubey, V. |4 aut | |
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10.1007/s10854-016-5819-0 doi (DE-627)OLC2026316465 (DE-He213)s10854-016-5819-0-p DE-627 ger DE-627 rakwb eng 600 670 620 VZ Singh, D. verfasserin aut Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. Full Width Half Maximum Glow Curve LaAlO3 Glow Peak Prepared Phosphor Kaur, J. aut Suryanarayana, N. S. aut Shrivastava, R. aut Dubey, V. aut Enthalten in Journal of materials science / Materials in electronics Springer US, 1990 28(2016), 3 vom: 05. Nov., Seite 2462-2470 (DE-627)130863289 (DE-600)1030929-9 (DE-576)023106719 0957-4522 nnns volume:28 year:2016 number:3 day:05 month:11 pages:2462-2470 https://doi.org/10.1007/s10854-016-5819-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_30 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2015 GBV_ILN_4046 GBV_ILN_4305 GBV_ILN_4323 AR 28 2016 3 05 11 2462-2470 |
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10.1007/s10854-016-5819-0 doi (DE-627)OLC2026316465 (DE-He213)s10854-016-5819-0-p DE-627 ger DE-627 rakwb eng 600 670 620 VZ Singh, D. verfasserin aut Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. Full Width Half Maximum Glow Curve LaAlO3 Glow Peak Prepared Phosphor Kaur, J. aut Suryanarayana, N. S. aut Shrivastava, R. aut Dubey, V. aut Enthalten in Journal of materials science / Materials in electronics Springer US, 1990 28(2016), 3 vom: 05. Nov., Seite 2462-2470 (DE-627)130863289 (DE-600)1030929-9 (DE-576)023106719 0957-4522 nnns volume:28 year:2016 number:3 day:05 month:11 pages:2462-2470 https://doi.org/10.1007/s10854-016-5819-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_30 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2015 GBV_ILN_4046 GBV_ILN_4305 GBV_ILN_4323 AR 28 2016 3 05 11 2462-2470 |
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10.1007/s10854-016-5819-0 doi (DE-627)OLC2026316465 (DE-He213)s10854-016-5819-0-p DE-627 ger DE-627 rakwb eng 600 670 620 VZ Singh, D. verfasserin aut Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. Full Width Half Maximum Glow Curve LaAlO3 Glow Peak Prepared Phosphor Kaur, J. aut Suryanarayana, N. S. aut Shrivastava, R. aut Dubey, V. aut Enthalten in Journal of materials science / Materials in electronics Springer US, 1990 28(2016), 3 vom: 05. Nov., Seite 2462-2470 (DE-627)130863289 (DE-600)1030929-9 (DE-576)023106719 0957-4522 nnns volume:28 year:2016 number:3 day:05 month:11 pages:2462-2470 https://doi.org/10.1007/s10854-016-5819-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_30 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2015 GBV_ILN_4046 GBV_ILN_4305 GBV_ILN_4323 AR 28 2016 3 05 11 2462-2470 |
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10.1007/s10854-016-5819-0 doi (DE-627)OLC2026316465 (DE-He213)s10854-016-5819-0-p DE-627 ger DE-627 rakwb eng 600 670 620 VZ Singh, D. verfasserin aut Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. Full Width Half Maximum Glow Curve LaAlO3 Glow Peak Prepared Phosphor Kaur, J. aut Suryanarayana, N. S. aut Shrivastava, R. aut Dubey, V. aut Enthalten in Journal of materials science / Materials in electronics Springer US, 1990 28(2016), 3 vom: 05. Nov., Seite 2462-2470 (DE-627)130863289 (DE-600)1030929-9 (DE-576)023106719 0957-4522 nnns volume:28 year:2016 number:3 day:05 month:11 pages:2462-2470 https://doi.org/10.1007/s10854-016-5819-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_30 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2015 GBV_ILN_4046 GBV_ILN_4305 GBV_ILN_4323 AR 28 2016 3 05 11 2462-2470 |
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10.1007/s10854-016-5819-0 doi (DE-627)OLC2026316465 (DE-He213)s10854-016-5819-0-p DE-627 ger DE-627 rakwb eng 600 670 620 VZ Singh, D. verfasserin aut Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science+Business Media New York 2016 Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. Full Width Half Maximum Glow Curve LaAlO3 Glow Peak Prepared Phosphor Kaur, J. aut Suryanarayana, N. S. aut Shrivastava, R. aut Dubey, V. aut Enthalten in Journal of materials science / Materials in electronics Springer US, 1990 28(2016), 3 vom: 05. Nov., Seite 2462-2470 (DE-627)130863289 (DE-600)1030929-9 (DE-576)023106719 0957-4522 nnns volume:28 year:2016 number:3 day:05 month:11 pages:2462-2470 https://doi.org/10.1007/s10854-016-5819-0 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_30 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2015 GBV_ILN_4046 GBV_ILN_4305 GBV_ILN_4323 AR 28 2016 3 05 11 2462-2470 |
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High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. 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Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ |
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Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ |
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synthesis and luminescent behavior of uv induced $ dy^{3+} $ activated $ laalo_{3} $ |
| title_auth |
Synthesis and luminescent behavior of UV induced $ Dy^{3+} $ activated $ LaAlO_{3} $ |
| abstract |
Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. © Springer Science+Business Media New York 2016 |
| abstractGer |
Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. © Springer Science+Business Media New York 2016 |
| abstract_unstemmed |
Abstract $ Dy^{3+} $ doped Lanthanum Aluminate phosphors are prepared for different concentrations of dopant and the luminescent properties of the phosphor are studied. High temperature modified solid-state reaction method is used for the synthesis. XRD analysis confirms the formation of $ LaAlO_{3} $:$ Dy^{3+} $ phosphor. Average crystallite size calculated is 40.085 nm.Thermoluminescence study of UV induced $ LaAlO_{3} $:$ Dy^{3+} $ phosphor is discussed in this paper. Thermoluminescence glow peak is recorded for different UV exposure time and for different concentrations of dopant. Kinetic parameters such as shape factor, activation energy, order of kinetics are calculated by using computerized glow curve deconvolution technique. Activation energy varies from 0.63 to 0.72 eV. The TL glow curve intensity varies nearly linear with increasing UV dose. Photoluminescence (PL) emission spectra are recorded for different concentrations of dopant. Highest intensity of PL emission was obtained for 1.5 mol% of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor. The excitation spectra of $ Dy^{3+} $ doped $ LaAlO_{3} $ phosphor monitored at 550 nm shows broad band around 260 nm and a sharp peak at 394 nm. Peaks with lower intensity are obtained at 320 nm, 363 nm and 384 nm. In the Pl emission spectra, peak at 554 nm (yellow greenish) has highest intensity. Peaks with less intensity are obtained at 466 nm (blue), 645 nm (orange red) and 740 nm (brownish red). Pl intensity varies linearly with increasing concentration of dopant. CIE chromaticity coordinates are calculated for $ LaAlO_{3} $:$ Dy^{3+} $ (1.5 mol%), x = 0.3586 and y = 0.5421 which corresponds to yellow–greenish region. The prepared phosphor may find application in dosimetry and optical devices. © Springer Science+Business Media New York 2016 |
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