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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Photoluminescence: Fluorescence and Phosphorescence01:23

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Fluorescence and Phosphorescence: Instrumentation01:25

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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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A New Promising Silicate-Based Phosphor for Red Light and White Light Emitting Devices.

Büşra Yazıcı Başaran1, Vural Emir Kafadar2, Fatih Mehmet Emen3

  • 1Department of Engineering Physics, Gaziantep University, Gaziantep, 27310, Turkey.

Journal of Fluorescence
|March 4, 2025
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Summary

This study synthesizes and characterizes novel Ba₃CdSi₂O₈ phosphors doped with Ce³⁺, Eu³⁺, and Dy³⁺ for light-emitting devices. The doped materials exhibit distinct photoluminescence properties, paving the way for new lighting applications.

Keywords:
Ba3CdSi2O8FTIRPhotoluminescenceRare earthSolid-state methodXRD

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Luminescence

Background:

  • Developing efficient phosphors is crucial for advanced light-emitting devices.
  • Understanding the structure-property relationships of novel host materials is essential for targeted applications.

Purpose of the Study:

  • To synthesize and characterize Ba₃CdSi₂O₈ phosphors doped with cerium (Ce³⁺), europium (Eu³⁺), and dysprosium (Dy³⁺).
  • To investigate the structural, morphological, photoluminescent, and chemical properties of these novel phosphors.
  • To evaluate their potential for applications in light-emitting devices.

Main Methods:

  • Solid-state reaction method for phosphor synthesis.
  • X-ray Diffraction (XRD) and Fourier-Transform Infrared (FT-IR) spectroscopy for structural characterization.
  • Photoluminescence (PL) spectroscopy to analyze emission spectra and CIE color coordinates.

Main Results:

  • XRD confirmed the formation of the Ba₃CdSi₂O₈ host structure with no impurities.
  • Dy³⁺-doped phosphors showed emissions in blue, yellow, red, and deep red regions.
  • Ce³⁺-doped phosphors exhibited a broad emission band around 594 nm (5d-4f transition).
  • Eu³⁺-doped phosphors displayed characteristic emissions corresponding to 5D₀ → 7Fⱼ transitions, with color shifts towards red.

Conclusions:

  • The synthesized Ba₃CdSi₂O₈:RE phosphors possess promising photoluminescent properties.
  • Doping with Eu³⁺, Dy³⁺, and Ce³⁺ allows for tuning emission colors for diverse lighting applications.
  • These materials show potential for use in next-generation light-emitting devices.