Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation
Само за регистроване кориснике
2020
Чланак у часопису (Објављена верзија)
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© 2020 Elsevier B.V.
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In this paper, photoluminescence (PL) properties of Pr3+ single doped and Pr3+/Eu2+ co-doped Al2O3 coatings formed by plasma electrolytic oxidation of aluminum were investigated. The PL spectra of Al2O3:Pr3+ coatings feature bands ascribed to 4f-4f transitions of Pr3+. PL excitation spectra contain three broad bands in the violet and blue regions which correspond to the direct excitation of the Pr3+ ground state H-3(4) into higher levels P-3(J) (J = 0, 1, 2), while PL emission spectra contain several bands attributed to transitions of Pr3+ from excited levels P-3(0) and P-3(1) to the lower multiplets( 3)H(J) (J = 4, 5, 6) and F-3(J) (J = 2, 3, 4). Among these transitions, P-3(0)-> F-3(2) transition in the red region (644 nm) is the most intense. PL emission intensity of Pr3+ increases by co-doping Eu2+ into Al2O3:Pr(3+ )coatings due to the energy transfer from Eu2+ to Pr3+, occurring due to the overlap between PL emission spectra of Eu2+, excited by middle ultraviolet radiation, and PL... excitation spectra of Pr3+ in Al2O3 host. Under middle ultraviolet excitation, P-3(0)-> F-3(2) transition of Pr3+ in Al2O3:Pr3+/Eu2+ coatings is 62 times more intense than without co-doping and 16 times if comparison is made with Al2O3:Pr3+ excited by 446 nm. The total luminescence intensity of Al(2)O(3 )co-doped with Pr3+/Eu2+ and doped with Pr3+ is 3.6 times more intense of the former if both samples are excited by 446 nm. The gains are linearly increasing with Eu2+ doping concentration. Al2O3:Pr3+/Eu2+ poses as an alternative phosphor to YAG:Ce3+ for the creation of neutral white LEDs by excitation with InGaN semiconductors.
Кључне речи:
Pr3+ / Pr3+/Eu2+ / Photoluminescence / Energy transfer / Plasma electrolytic oxidation / Al2O3Извор:
Journal of Luminescence, 2020, 226, 117407-Финансирање / пројекти:
- Ministry of Education, Science and Technological Development of the Republic of Serbia
DOI: 10.1016/j.jlumin.2020.117407
ISSN: 0022-2313
WoS: 000559070600007
Scopus: 2-s2.0-85085737088
Институција/група
VinčaTY - JOUR AU - Stojadinović, Stevan AU - Ćirić, Aleksandar PY - 2020 UR - https://vinar.vin.bg.ac.rs/handle/123456789/9031 AB - In this paper, photoluminescence (PL) properties of Pr3+ single doped and Pr3+/Eu2+ co-doped Al2O3 coatings formed by plasma electrolytic oxidation of aluminum were investigated. The PL spectra of Al2O3:Pr3+ coatings feature bands ascribed to 4f-4f transitions of Pr3+. PL excitation spectra contain three broad bands in the violet and blue regions which correspond to the direct excitation of the Pr3+ ground state H-3(4) into higher levels P-3(J) (J = 0, 1, 2), while PL emission spectra contain several bands attributed to transitions of Pr3+ from excited levels P-3(0) and P-3(1) to the lower multiplets( 3)H(J) (J = 4, 5, 6) and F-3(J) (J = 2, 3, 4). Among these transitions, P-3(0)-> F-3(2) transition in the red region (644 nm) is the most intense. PL emission intensity of Pr3+ increases by co-doping Eu2+ into Al2O3:Pr(3+ )coatings due to the energy transfer from Eu2+ to Pr3+, occurring due to the overlap between PL emission spectra of Eu2+, excited by middle ultraviolet radiation, and PL excitation spectra of Pr3+ in Al2O3 host. Under middle ultraviolet excitation, P-3(0)-> F-3(2) transition of Pr3+ in Al2O3:Pr3+/Eu2+ coatings is 62 times more intense than without co-doping and 16 times if comparison is made with Al2O3:Pr3+ excited by 446 nm. The total luminescence intensity of Al(2)O(3 )co-doped with Pr3+/Eu2+ and doped with Pr3+ is 3.6 times more intense of the former if both samples are excited by 446 nm. The gains are linearly increasing with Eu2+ doping concentration. Al2O3:Pr3+/Eu2+ poses as an alternative phosphor to YAG:Ce3+ for the creation of neutral white LEDs by excitation with InGaN semiconductors. T2 - Journal of Luminescence T1 - Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation VL - 226 SP - 117407 DO - 10.1016/j.jlumin.2020.117407 ER -
@article{ author = "Stojadinović, Stevan and Ćirić, Aleksandar", year = "2020", abstract = "In this paper, photoluminescence (PL) properties of Pr3+ single doped and Pr3+/Eu2+ co-doped Al2O3 coatings formed by plasma electrolytic oxidation of aluminum were investigated. The PL spectra of Al2O3:Pr3+ coatings feature bands ascribed to 4f-4f transitions of Pr3+. PL excitation spectra contain three broad bands in the violet and blue regions which correspond to the direct excitation of the Pr3+ ground state H-3(4) into higher levels P-3(J) (J = 0, 1, 2), while PL emission spectra contain several bands attributed to transitions of Pr3+ from excited levels P-3(0) and P-3(1) to the lower multiplets( 3)H(J) (J = 4, 5, 6) and F-3(J) (J = 2, 3, 4). Among these transitions, P-3(0)-> F-3(2) transition in the red region (644 nm) is the most intense. PL emission intensity of Pr3+ increases by co-doping Eu2+ into Al2O3:Pr(3+ )coatings due to the energy transfer from Eu2+ to Pr3+, occurring due to the overlap between PL emission spectra of Eu2+, excited by middle ultraviolet radiation, and PL excitation spectra of Pr3+ in Al2O3 host. Under middle ultraviolet excitation, P-3(0)-> F-3(2) transition of Pr3+ in Al2O3:Pr3+/Eu2+ coatings is 62 times more intense than without co-doping and 16 times if comparison is made with Al2O3:Pr3+ excited by 446 nm. The total luminescence intensity of Al(2)O(3 )co-doped with Pr3+/Eu2+ and doped with Pr3+ is 3.6 times more intense of the former if both samples are excited by 446 nm. The gains are linearly increasing with Eu2+ doping concentration. Al2O3:Pr3+/Eu2+ poses as an alternative phosphor to YAG:Ce3+ for the creation of neutral white LEDs by excitation with InGaN semiconductors.", journal = "Journal of Luminescence", title = "Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation", volume = "226", pages = "117407", doi = "10.1016/j.jlumin.2020.117407" }
Stojadinović, S.,& Ćirić, A.. (2020). Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation. in Journal of Luminescence, 226, 117407. https://doi.org/10.1016/j.jlumin.2020.117407
Stojadinović S, Ćirić A. Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation. in Journal of Luminescence. 2020;226:117407. doi:10.1016/j.jlumin.2020.117407 .
Stojadinović, Stevan, Ćirić, Aleksandar, "Highly-increased photoluminescence of Pr3+ due to the Eu2+→ Pr3+ energy transfer in Al2O3 coatings formed by plasma electrolytic oxidation" in Journal of Luminescence, 226 (2020):117407, https://doi.org/10.1016/j.jlumin.2020.117407 . .