{"title":"Investigation on luminescence characteristics of Dy3+-Tb3+ co-doped phospho-tellurite glasses for tunable green/ white LED applications","authors":"Joydeb Biswas, Samar Jana, Sourav Ghosh","doi":"10.1016/j.saa.2025.125756","DOIUrl":null,"url":null,"abstract":"<div><div>Dy<sup>3+</sup>/Tb<sup>3+</sup> co-doped glasses have drawn profound attention for their potential in solid state lighting due to their unique luminescence properties. This research highlights the effect of compositional variation on structural and optical characteristics of Dy<sup>3+</sup>/Tb<sup>3+</sup> co-doped phospho-tellurite glasses through a comprehensive analysis involving X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) studies. XRD and FTIR spectroscopy are conducted to characterize the glass matrix and confirm its structural integrity. Luminescence spectroscopy is used to explicate the emission mechanism of the present glass system, revealing significant decrement in both intensity (<strong>Dy</strong><sup><strong>3+</strong></sup> <strong>& Tb</strong><sup><strong>3+</strong></sup>) and wavelength tunability when glass network is modified by monovalent (Na<sup>+</sup>) to trivalent (B<sup>3+</sup>) compounds. Photoluminescence measurements provide insights into the glass system for the efficient energy transfer between Dy<sup>3+</sup> and Tb<sup>3+</sup> ions, leading to strong visible (<strong>yellow</strong> & <strong>green</strong>) emissions. The luminescence decay kinetics is analyzed to understand the dynamic processes, governing the emission lifetimes and energy transfer mechanisms. Additionally, CIELab color coordinates are employed to assess the colour purity and tunability of the emitted light. The outcomes suggest that the present glasses offer promising attributes for multicolor light generation, paving a pathway towards optimizing material design in the field of solid state lighting.</div></div>","PeriodicalId":433,"journal":{"name":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","volume":"331 ","pages":"Article 125756"},"PeriodicalIF":4.6000,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1386142525000629","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SPECTROSCOPY","Score":null,"Total":0}
引用次数: 0
Abstract
Dy3+/Tb3+ co-doped glasses have drawn profound attention for their potential in solid state lighting due to their unique luminescence properties. This research highlights the effect of compositional variation on structural and optical characteristics of Dy3+/Tb3+ co-doped phospho-tellurite glasses through a comprehensive analysis involving X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) studies. XRD and FTIR spectroscopy are conducted to characterize the glass matrix and confirm its structural integrity. Luminescence spectroscopy is used to explicate the emission mechanism of the present glass system, revealing significant decrement in both intensity (Dy3+& Tb3+) and wavelength tunability when glass network is modified by monovalent (Na+) to trivalent (B3+) compounds. Photoluminescence measurements provide insights into the glass system for the efficient energy transfer between Dy3+ and Tb3+ ions, leading to strong visible (yellow & green) emissions. The luminescence decay kinetics is analyzed to understand the dynamic processes, governing the emission lifetimes and energy transfer mechanisms. Additionally, CIELab color coordinates are employed to assess the colour purity and tunability of the emitted light. The outcomes suggest that the present glasses offer promising attributes for multicolor light generation, paving a pathway towards optimizing material design in the field of solid state lighting.
期刊介绍：
Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science.
The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments.
Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate.
Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to:
Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences,
Novel experimental techniques or instrumentation for molecular spectroscopy,
Novel theoretical and computational methods,
Novel applications in photochemistry and photobiology,
Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.
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