Study of Combustion-Derived Monoclinic Crystal (Ba2MgSi2O7) Structure and Dy3+ Luminescence for Generation of White Long Afterglow Phosphor and Its Applications

Abstract

Here, the crystalline structural (X-Ray Diffraction), morphological (Field Emission Scanning Electron Microscopy), optical (Photoluminescence, Commission International de l’Eclairage, & Correlated Color Temperature), and thermal (Thermoluminescence) characteristics of Ba₂MgSi₂O₇:Dy³⁺ nanophosphor was investigated. The compounds were successfully prepared by the combustion synthesis technique (CST) at 700 °C for 5 min, followed by annealing at 1000 °C for 3 h. X-Ray Diffraction (XRD) patterns have shown a single-phase material having a monoclinic structure in space group C2/c. The particle morphological shapes have shown in the nano range. All the kinetic and trapping parameters of the trap centre evaluated by the Thermoluminescence (TL) glow curve were examined via the Chen empirical formula. The trap depths were found to be in the range of 0.66-0.74 eV. Prominent emission peaks were observed at 474 nm (blue), 572 nm (yellow), and 667 nm (red) due to three optical transitions (⁴F_9/2 → ⁶H_15/2, _13/2, _11/2), respectively. In our investigation, the critical distance (R_c) is calculated as 16.89 Å; therefore, the mechanism involved in the concentration quenching of Ba₂MgSi₂O₇ activated with a 3 mol% concentration of Dy³⁺ ions are considered to be the multipole-multipolar interaction. In photochromatic characterization study, the Commission International de l’Eclairage (CIE) chromaticity coordinates are found in the white color region, and it is well suited for generating cool light emission. The calculated correlated color temperature (CCT) is 6113 K, and the color rendering index (CRI) R_a is above 89. The prepared phosphor is potentially applicable for white LED-based solid-state lighting devices and long-persistent phosphor.

Received:  7 February 2024 | Revised: 29 July 2024 | Accepted: 22 August 2024

Conflicts of Interest

The authors declare that they have no conflicts of interest to this work.

Data Availability Statement

Data sharing is not applicable to this article as no new data were created or analyzed in this study.

Author Contribution Statement

Shashank Sharma: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Resources, Data curation, Writing - original draft, Writing - review & editing, Visualization, Supervision. Sanjay Kumar Dubey: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Resources, Data curation, Writing - original draft, Writing - review & editing, Visualization, Supervision.