The concentration effect of Ce3+ ions on the photoluminescence properties of the host sensitized NaMPO4-Ce3+ (M = Mg and Ca) phosphors via solid-state reaction method

Sefage, Amanda Percy; Mamo, M.A.; Masiteng, P. L.; Balakrishna, A.; Coetsee, E.; Swart, H.C.; Reddy, Leelakrishna

doi:10.1016/j.physb.2022.414383

Cited by 12 publications

(1 citation statement)

References 26 publications

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“…A combination of this yellow light with the remaining blue light results in a high-resolution of white light [ 30 ]. Basically, the color-correlated temperature (CCT) values change which subsequently produces a range of visible colors, such as different shades of white light (warm or cool), which may be applicable to various environmental settings [ 31 ].…”

Section: Usage Of Ce 3+ Compounds In Leds and Oleds For Displaysmentioning

confidence: 99%

Cerium Compounds in LEDs Technology

L.A. Letswalo,

Reddy

2024

Cerium - Chemistry, Technology, Geology, Soil Science and Economics

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This chapter explores the application and benefits of cerium compounds in LEDs, delving into their impact on photoluminescence, electroluminescence, quantum efficiency, and color quality. Cerium compounds (CeO2) play a crucial role in enhancing the efficiency of LEDs. Phosphors are substances that absorb photons and emit light of different wavelengths. By introducing cerium compounds as phosphors in LEDs, the conversion of blue light to other colors becomes more efficient, resulting in improved luminous efficacy. In this chapter, the study on YAG:Ce phosphor material shows that vacuum annealing tends to suppress Ce3+ oxidation more than air annealing, leading to a considerable 20% increase in photoluminescence emission intensity. The optimized YAG:Ce nanoparticles were used to create a white light emitting diode (WLED) that produced cool-white light with a maximum radiation luminous efficacy of 285 lm/W and a comparable color rendering index of 83. Furthermore, Na2MgSiO4:Ce3+:Li+ phosphor study displays tunable emission color characteristics when the content of Ce3+ is increased or Li+ is added as a charge compensator. The utilization of cerium compounds (CeO2) has demonstrated significant efficiency and color quality improvements on YAG:Ce and Na2MgSiO4:Ce3+:Li+ phosphor components.

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Section: Usage Of Ce 3+ Compounds In Leds and Oleds For Displaysmentioning

confidence: 99%

Cerium Compounds in LEDs Technology

L.A. Letswalo,

Reddy

2024

Cerium - Chemistry, Technology, Geology, Soil Science and Economics

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Extended Range of Ratiometric Luminescence Codes with Ce³⁺ Modified Gd₂O₂S:Er³⁺,Yb³⁺ Shortwave Infrared Phosphors

Cosgun Ergene,

Madirov,

Coetsee‐Hugo

et al. 2024

Advanced Optical Materials

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Lanthanide (Ln3+) based luminescent materials, with their distinctive emission spectra, offer opportunities to develop novel coding patterns for various applications, including Tracer Based Sorting (TBS). TBS uses trace amounts of inorganic phosphors and is a promising method for sorting plastics based on criteria beyond plastic type. This study investigates the synergistic effect of co‐doping with Ce3+ to enhance Er3+ luminescence at ≈1550 nm (with a maximum photoluminescence quantum yield (PLQY) of 5.7%) while significantly reducing Yb3+ luminescence at ≈1000 nm. The underlying mechanisms of these properties are analyzed using absolute PLQY measurements in an integrating sphere, luminescence decay studies, and X‐ray photoelectron spectroscopy. Hyperspectral shortwave infrared imaging reveals an extended range of unique tracer combinations based on ratiometric intensity measurements, particularly when the Yb3+/Er3+/Ce3+ tracers are mixed with a single‐doped Yb3+ tracer, compared to simple mixtures of Ce3+‐free Yb3+/Er3+ and Yb3+ tracers. Therefore, the use of the tri‐doped Yb3+/Er3+/Ce3+ Gd2O2S tracer increases the diversity of available luminescent tracers that may be of potential interest in the identification and sorting of plastic waste using the TBS process.

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Revolutionizing Fingerprint Detection: Ce3+ Doped SiO2-Zr2O3:Sr2+ Nanocomposites with Enhanced Luminescence and Selectivity

Qayyum,

Shahid,

Mansoor

et al. 2024

J Fluoresc

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Even though fingerprints remain one of the most reliable methods of identification, they are often lost during the recovery process. Accurate fingerprint recognition depends on the contrast between the ridges and substrate. On tough surfaces, such as glossy, colorful, and patterned materials, the contrast is harder to establish. Photoluminescent materials play a crucial role in forensic investigations as they enable the development of procedures that enhance image quality and increase the accuracy of findings from security institutions. Due to the strong emission in the red area at 620 nm, the use of trivalent Rare Earth ions (RE3+) doped materials in this work is notable. Because of the unique properties and abundance of cerium, luminous materials based on SiO2-Zr2O3: Ce3+, Sr2+ prepared via sol-gel technique present a more practical alternative for use in criminal investigations compared to current photonic materials. The sample was further co-doped with synthetic (Safranin-O and crystal violet) as well as organic (curcumin and lycopene) photoluminescent dyes. The nanocomposites were examined using X-ray diffraction analysis (XRD), energy-dispersive X-ray analysis (EDX), dynamic light scattering (DLS), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL). In conclusion, this work highlights the qualities critical to obtaining higher-resolution latent fingerprint images for potential forensic applications.

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The concentration effect of Ce3+ ions on the photoluminescence properties of the host sensitized NaMPO4-Ce3+ (M = Mg and Ca) phosphors via solid-state reaction method

Cited by 12 publications

References 26 publications

Cerium Compounds in LEDs Technology

Cerium Compounds in LEDs Technology

Extended Range of Ratiometric Luminescence Codes with Ce³⁺ Modified Gd₂O₂S:Er³⁺,Yb³⁺ Shortwave Infrared Phosphors

Revolutionizing Fingerprint Detection: Ce3+ Doped SiO2-Zr2O3:Sr2+ Nanocomposites with Enhanced Luminescence and Selectivity

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The concentration effect of Ce3+ ions on the photoluminescence properties of the host sensitized NaMPO4-Ce3+ (M = Mg and Ca) phosphors via solid-state reaction method

Cited by 12 publications

References 26 publications

Cerium Compounds in LEDs Technology

Cerium Compounds in LEDs Technology

Extended Range of Ratiometric Luminescence Codes with Ce3+ Modified Gd2O2S:Er3+,Yb3+ Shortwave Infrared Phosphors

Revolutionizing Fingerprint Detection: Ce3+ Doped SiO2-Zr2O3:Sr2+ Nanocomposites with Enhanced Luminescence and Selectivity

Contact Info

Product

Resources

About

Extended Range of Ratiometric Luminescence Codes with Ce³⁺ Modified Gd₂O₂S:Er³⁺,Yb³⁺ Shortwave Infrared Phosphors