Review on rare earth metals doped LaPO4 for optoelectronic applications

Priya, R.; Mariappan, R.; Karthikeyan, A.; Palani, E.; Krishnamoorthy, E.; Gowrisankar, G.

doi:10.1016/j.ssc.2021.114457

Cited by 15 publications

(5 citation statements)

References 126 publications

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“…have been studied for many years as luminescent materials. 1 In particular, yttrium orthophosphate is considered an excellent host lattice for lanthanide doping due to its unique electronic, optical, and chemical properties. The excellent spectroscopic properties were also confirmed for single crystals, which allowed it to be used as a luminophore after appropriate doping with lanthanide ions 2 and laser material.…”

Section: Introductionmentioning

confidence: 99%

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Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Paradisi,

Mortalò,

Zin

et al. 2024

ACS Appl. Nano Mater.

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In this work, a rapid microwave-assisted hydrothermal method under mild conditions is investigated for the preparation of the Eu 3+ :YPO 4 (5 mol % Eu) luminescent material, which belongs to a large family of phosphates that, when doped with lanthanide ions, acquire specific luminescence properties used primarily as phosphors for modern light sources and as optical markers. Crystalline Eu 3+ :YPO 4 nanopowders are obtained in very short times (as little as 5 min) compared to conventional methods without the need for additional calcination treatment. Moreover, varying the reaction time (up to 30 min) and temperature (up to 240 °C) results in different nanocrystal morphologies and sizes, which can be tuned by controlling the reaction parameters, thus potentially tuning the optical properties of the nanoparticles. The resulting nanopowders exhibit intense emission at an excitation wavelength of 396 nm, and their optical properties, studied by measuring both excitation and emission spectra, luminescence lifetimes, and quantum yields, are comparable to those obtained by conventional heating. These results suggest that the MW-assisted hydrothermal process optimized in this work is a powerful strategy to produce single-phase Eu 3+ :YPO 4 (5 mol % Eu) luminescent nanopowders with a low degree of hydration, monodisperse tuned morphology and narrow particle size distribution in much shorter times than previously reported (5−30 min). So we have developed a faster and more energy-efficient way of producing these materials, which could potentially be used for security purposes.

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Section: Introductionmentioning

confidence: 99%

“…Rare-earth (RE) orthophosphates with the general formula REPO 4 (RE = Y, Ln, Gd, etc.) have been studied for many years as luminescent materials . In particular, yttrium orthophosphate is considered an excellent host lattice for lanthanide doping due to its unique electronic, optical, and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Paradisi,

Mortalò,

Zin

et al. 2024

ACS Appl. Nano Mater.

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“…Therefore, the surfactant, chelating agent, pH level, and reaction temperature all are factors in the way a final product comes during the synthesis process. Also, the mechanical, thermal, photoluminescence (PL), and electrical properties of samples can be altered by adjusting their physicochemical qualities, which are greatly influenced by structural factors such as their shape, size, structure, and surface composition [21].…”

Section: Introductionmentioning

confidence: 99%

Heterojunction structure for high electrical performance of Cu/Sn-LaPO 4 /n-Si type Schottky barrier diode

Mariappan

Priya

Bakkiyaraj

et al. 2023

Preprint

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The Cu/Sn-LaPO4/n-Si MIS Schottky barrier diode (SBD) with a 10% Sn doping has been successfully fabricated, and their photodiode properties were investigated. The I-V forward and reverse bias curves determine the photodiode parameters such as barrier height, ideality factor, and saturation currents from the thermionic emission theory. The results of the experiments with 10% Sn-LaPO4 SBDs showed a linear decrease in the ideality factor (n) up to 2.31 and 1.74, respectively, with a small increase in the effective barrier height (𝛟B) of 0.744 and 0.806 eV in dark and light conditions these results signify their use in optoelectronic industries.

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“…In addition, most lanthanide ions doped in inorganic host materials of REPO 4 (RE = Y, La, Gd, Lu) have very high thermal and chemical stability [ 17 , 18 , 19 , 20 , 21 , 22 ] which is important in biosensing devices [ 23 , 24 , 25 ]. Among inorganic hosts, lanthanide phosphate (LaPO 4 ) has a high index of refraction ( n = 1.85) and is widely investigated as a biological-sensing, drug-delivery, and light-emitting device [ 26 , 27 , 28 , 29 , 30 ]. Lanthanum phosphate has also been identified as a suitable host matrix for lanthanide ions with the co-doping approach used to prepare compounds with tunable and multicolor emissions [ 31 , 32 , 33 , 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

et al. 2023

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Nanophosphors are widely used, especially in biological applications in the first and second biological windows. Currently, nanophosphors doped with lanthanide ions (Ln3+) are attracting much attention. However, doping the matrix with lanthanide ions is associated with a narrow luminescence bandwidth. This paper describes the structural and luminescence properties of co-doped LaPO4 nanophosphors, fabricated by the co-precipitation method. X-ray structural analysis, scanning electron microscope measurements with EDS analysis, and luminescence measurements (excitation 395 nm) of LaPO4:Eu3+/Nd3+ and LaPO4:Eu3+/Nd3+/Yb3+ nanophosphors were made and energy transfer between rare-earth ions was investigated. Tests performed confirmed the crystal structure of the produced phosphors and deposition of rare-earth ions in the structure of LaPO4 nanocrystals. In the range of the first biological window (650–950 nm), strong luminescence bands at the wavelengths of 687 nm and 698 nm (5D0 → 7F4:Eu3+) and 867 nm, 873 nm, 889 nm, 896 nm, and 907 nm (4F3/2 → 4I9/2:Nd3+) were observed. At 980 nm, 991 nm, 1033 nm (2F5/2 → 2F7/2:Yb3+) and 1048 nm, 1060 nm, 1073 nm, and 1080 nm (4F3/2 → 4I9/2:Nd3+), strong bands of luminescence were visible in the 950 nm–1100 nm range, demonstrating that energy transfer took place.

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Review on rare earth metals doped LaPO4 for optoelectronic applications

Cited by 15 publications

References 126 publications

Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Heterojunction structure for high electrical performance of Cu/Sn-LaPO 4 /n-Si type Schottky barrier diode

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

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Review on rare earth metals doped LaPO4 for optoelectronic applications

Cited by 15 publications

References 126 publications

Eu-Doped YPO4 Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Eu-Doped YPO4 Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Heterojunction structure for high electrical performance of Cu/Sn-LaPO 4 /n-Si type Schottky barrier diode

Analysis of Excitation Energy Transfer in LaPO4 Nanophosphors Co-Doped with Eu3+/Nd3+ and Eu3+/Nd3+/Yb3+ Ions

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Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method

Eu-Doped YPO₄ Luminescent Nanopowders for Anticounterfeiting Applications: Tuning Morphology and Optical Properties by a Rapid Microwave-Assisted Hydrothermal Method