Judd–Ofelt analysis of Dy³⁺ doped Ca₂MgSi₂O₇ phosphors resulting in white light emission

Abstract

Di-calcium magnesium silicate (Ca₂MgSi₂O₇) doped with various concentrations (1.0 mol%, 2.0 mol%, 2.5 mol%, and 3.0 mol%) of dysprosium (III) was prepared using a high-temperature technique named as solid state reaction method. The sample with 2.5 mol% of dysprosium (III) underwent X-ray diffraction (XRD) characterization to confirm the proper phase formation in the sample. Observed XRD pattern matched significantly with crystallographic open database (Card No.96-210-6180) with a significantly high figure of merit (0.84). Photoluminescence (PL) excitation and emission spectra were also recorded. PL excitation spectrum of Ca₂MgSi₂O₇ doped with 2.5 mol% of dysprosium (III) exhibited a most prominent peak at 395 nm, therefore, the emission spectra of the samples were monitored at 395 nm excitation. The emission spectra exhibited prominent peaks centered at 483 nm (blue), 577 nm (yellow), and 664 nm (orange red) due to the transitions ⁴F_9/2→⁶H_15/2, ⁴F_9/2→⁶H_13/2, and ⁴F_9/2→⁶H_11/2, respectively. The Commission Internationale de L’Eclairage (CIE) of this emission spectra was found at (0.304, 0.340) which lies in the white light region. Keeping the objective to evaluate the emitted white light for its suitability in light-emitting diode (LED) application, color rendering index (CRI) and color correlated temperature (CCT) were also calculated. Radiation life time was estimated using Judd–Ofelt analysis.

Keywords

A

References

[1] Yang F, Ma H, Liuc Y, et al.. Photoluminescence properties of novel Dy³⁺ doped Ba₅CaAl₄O₁₂ phosphors. Ceramics international, 2014, 40: 10189-10192 J]

[2] Liang C H, Teoh L G, Liu K T, et al.. Near white light emission of BaY₂ZnO₅ doped with Dy³⁺ ions. Journal of alloys and compounds, 2012, 517: 9-13 J]

[3] Wang J, Wang J, Duan P. Luminescent properties of Dy³⁺ doped Sr₃Y(PO₄)₃ for white LEDs. Materials letters, 2013, 107: 96-98 J]

[4] Liu Q, Liu Y, Ding Y, et al.. A white light emitting luminescent material Ba₃Y(PO₄)₃:Dy³⁺. Ceramics international, 2014, 40: 10125-10129 J]

[5] Liu B, Kong L, Shi C. White-light long-lasting phosphor Sr₂MgSi₂O₇:Dy³⁺. Journal of luminescence, 2007, 122–123: 121-124 J]

[6] Lin L, Zhao Z H, Zhang W P, et al.. Photoluminescence properties and thermo-luminescence curve analysis of a new white long-lasting phosphor: Ca₂MgSi₂O₇:Dy³⁺. Journal of rare earth, 2009, 27(5): 749-752 J]

[7] Shrivastava R, Kaur J, Dubey V. White light emission by Dy³⁺ doped phosphor matrices: a short review. Journal of fluorescence, 2016, 26(1): 105-111 J]

[8] Kaur J, Chandrakar D, Dubey V, et al.. Photoluminescence characteristics of dysprosium doped CeO₂ phosphor for white light emission. Journal of display technology, 2016, 12(5): 506-512 J]

[9] Shrivastava R, Dash M. Studies on white light emission of Sr₂MgSi₂O₇ doped with Dy³⁺ phosphors. Superlattices and microstructures, 2015, 82: 262-268 J]

[10] RAO K K, RAO M C, DUBEY V. Intense orange red emission from Sm³⁺-activated Ca₃Al₂O₆ phosphor for display device application[J]. Russian journal of physics, 2024.

[11] Revannasiddappa G R, Basavaraj R B, Rudresha M S, et al.. White-light emitting Ca₂MgSi₂O₇:Dy³⁺ nanopowders: structural, spectroscopic investigations and advanced forensic applications. Vacuum, 2021, 184: 109940 J]

[12] Boruc Z, Fetlinski B, Malinowski M, et al.. Optical transitions intensities of Dy³⁺:Y₄Al₂O₉ crystals. Optical materials, 2012, 34(12): 2002-2007 J]

[13] Sharma S, Dubey S K. Importance of the color temperature in cold white light emission of Ca₂MgSi₂O₇: Dy³⁺ phosphor. Journal of applied chemical science international, 2022, 13(480-90 J]

[14] TALUKDAR P R, DUBEY V, SAJI J, et al. White light emission from Dy³⁺-activated CaY₂O₄ phosphor[J]. Russian journal of physics, 2024.

[15] Verma B, Baghel R N, Bisen D P, et al.. Microstructural, luminescence properties and Judd–Ofelt analysis of Eu³⁺ activated K₂Zr(PO₄)₂ phosphor for lighting and display applications. Optical materials, 2022, 129: 112459 J]

[16] Carnall W T, Fields P R, Wybourne B G. Spectral intensities of the trivalent lanthanides and actinides in solution. I. Pr³⁺, Nd³⁺, Er³⁺, Tm³⁺, and Yb³⁺. The journal of chemical physics, 1965, 42(11): 3797-3806 J]

[17] Shrivastava R. Judd–Ofelt analysis of barium zirconate doped with various concentrations of europium (III). Integrated ferroelectrics, 2024, 240(192-98 J]

[18] Walsh B M. Di Bartolo, Forte O. Judd–Ofelt theory: principles and practices. Advances in spectroscopy for lasers and sensing, 2015, Netherlands, Springer[M]

RIGHTS & PERMISSIONS

Tianjin University of Technology