Effect of Li ions on structure and spectroscopic properties of NaY(WO4)2: Yb/Ho phosphor

Zhang, Chaoyi; Wang, Xinyu; Li, Chun; Lin, Hai; Zeng, Fanming; Su, Zhong‐Min

doi:10.1016/j.ceramint.2020.06.205

“…The peak position at 578.6eV corresponds to Cr 4+ ions, while no peak position corresponding to Cr 3+ ions is found. Therefore, it can be concluded that Cr 4+ ions were successfully introduced into the Li 2 TiGeO 5 sample [16][17][18].…”

Section: Characterization Methodsmentioning

confidence: 99%

Near-infrared luminescence investigation of Cr4+ ions doped Li2TiGeO5

Wang

¹

,

Jiang

²

,

Leng

³

et al. 2021

J Mater Sci: Mater Electron

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In this paper, the preparation of a series of Li 2 TiGe 1-x Cr x O 5 phosphors by high-temperature solid-state reaction is reported. The results of X-ray diffraction show that the doping of Cr 4+ ions makes the lattice expand to a larger size. X-ray photoelectron spectroscopy (XPS) analysis shows that the chromium ions in the sample are tetravalent, con rmed further by uorescence spectroscopy. Under the excitation of 980nm laser, the Cr 4+ ions 3 T 2 doped 3 A 2 radiates transition and emits light at 1300nm. At the same time, the luminescence lifetime decreases with the increase in Cr 4+ ions doping concentration. Li 2 TiGe 1-x Cr x O 5 phosphors have a broad application prospect in near-infrared LEDs. Highlights 1. The Li 2 TiGe 1-x Cr x O 5 phosphor was prepared by the high-temperature solid-phase reaction method.2. The luminescence lifetime decreases with the increase in Cr 4+ ions doping concentration.. 3. Li 2 TiGe 1-x Cr x O 5 phosphors have a broad application prospect in near-infrared LEDs..

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“…corresponds to Cr 4+ ions, while no peak position corresponding to Cr 3+ ions is found. Therefore, it can be concluded that Cr 4+ ions were successfully introduced into the Li 2 TiGeO 5 sample [16][17][18].…”

Section: Structure Analysis Of LI 2 Tige 1-x Cr X Omentioning

confidence: 99%

Near-Infrared Luminescence Investigation of Cr4+ ions Doped Germanate

Zeng

¹

,

Wang

²

,

Jiang

³

et al. 2021

Preprint

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In this paper, the preparation of a series of Li2TiGe1-xCrxO5 phosphors by high-temperature solid-state reaction is reported. The results of X-ray diffraction show that the doping of Cr4+ ions makes the lattice expand to a larger size. X-ray photoelectron spectroscopy (XPS) analysis shows that the chromium ions in the sample are tetravalent, confirmed further by fluorescence spectroscopy. Under the excitation of 980nm laser, the Cr4+ ions 3T2 doped 3A2 radiates transition and emits light at 1300nm. At the same time, the luminescence lifetime decreases with the increase in Cr4+ ions doping concentration. Li2TiGe1-xCrxO5 phosphors have a broad application prospect in near-infrared LEDs.

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Various Applications of Gadolinium Molybdate Down‐Conversion and Up‐Conversion Fluorescent Nanoparticles

Jung,

Park,

Yang

2024

Advanced Optical Materials

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0

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Crystalline α‐Gd2(MoO4)3 is synthesized by sintering at 800 °C using a coprecipitation method to prepare the precursor. The resulting α‐Gd2(MoO4)3 displayed a monocrystalline structure with a strong main peak (‐221) in the X‐ray diffraction signal. To develop a light‐emitting material, rare earth ions are added during synthesis. By doping with Tb3+ and Eu3+, the Gd2(MoO4)3 down‐conversion phosphor shows potential for use in UV–LED chips, counterfeit money prevention, and fingerprint identification. Additionally, co‐doping with [Er3+]/[Yb3+] and [Ho3+]/[Yb3+] ions produce green and red emissions when applied to a 980 nm LED chip, useful for anti‐counterfeit ink. The magnetic properties of gadolinium are leveraged to confirm magnetic resonance imaging luminescence. A flexible composite for heat detection and explored various applications for its use is also developed.

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Effect of Li ions on structure and spectroscopic properties of NaY(WO4)2: Yb/Ho phosphor

Cited by 35 publications

References 48 publications

Near-infrared luminescence investigation of Cr4+ ions doped Li2TiGeO5

Near-infrared luminescence investigation of Cr4+ ions doped Li2TiGeO5

Near-Infrared Luminescence Investigation of Cr4+ ions Doped Germanate

Various Applications of Gadolinium Molybdate Down‐Conversion and Up‐Conversion Fluorescent Nanoparticles

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