Investigation of 515nm green-light emission for full color emission LaAlO3 phosphor with varied valence Eu

Mao, Zhiyong; Zhu, Yin; Fei, Qin-ni; Wang, Dajian

doi:10.1016/j.jlumin.2011.01.020

Cited by 25 publications

(6 citation statements)

References 24 publications

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“…%) phosphor, with an excitation wavelength of 297 nm and luminescence wavelength of 440 nm were fitted by a double exponential decay model with τ 1 = 592 ns, f 1 = 0.9819 and τ 2 = 29 ns, f 2 = 0.0181; and a χ 2 = 1.185. These values are comparable to previously reported values for Eu 2+ in another host material [36][37][38], it is known that the d-f transition of Eu 2+ is parity and spin allowed with a lifetime on the order of sub-microseconds [39,40]. Figure 6 shows the cathode-luminescence (CL) spectra for (La-Al) 2 O 3 :Eu 2+ (5at.%) and (La-Al) 2 O 3 : Eu 2+ (5at.%) /Li + (4.5 at.…”

Section: Resultssupporting

confidence: 91%

Luminescent characteristics of Eu2+/Li+ doped (La-Al)2O3 phosphors and PMMA films activated with them

et al. 2018

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The effect of Li co-doping on the blue luminescence of Eu2+ doped (La-Al)2O3 phosphors and its incorporation into poly (methyl methacrylate) PMMA films are reported. The phosphors were synthesized by a simple two-step process in which the (La-Al)2O3 powders were obtained by an evaporation method, and the subsequent co-doping with Li+ and Eu2 were made through a solid state reaction in a reductive atmosphere at 1250 0C. The incorporation of those phosphors into PMMA matrix and the synthesis of films with thicknesses between 6 and 12 μm was made by drop-casting. The characteristic blue broad band emission centered at 440 nm associated with the 4f65d1→ 4F7 transition of Eu2+ ions (CIE coordinates 0.6731, 0.3343) was observed when these powders were excited with 297nm light. These luminescence intensity was enhanced when Li was incorporated as co-dopant up to 320% with respect to those phosphors without Li. The luminescent characteristics of these phosphors were preserved when they were embedded into the PMMA films.

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Section: Resultssupporting

confidence: 91%

Luminescent characteristics of Eu2+/Li+ doped (La-Al)2O3 phosphors and PMMA films activated with them

et al. 2018

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“…It is also a good host material for a variety of guest ions, and both the A and B sites can be doped with a wide choice of other metal ions. This opens the doors to an extended range of possible applications; i.e., as photo- and/or thermo-luminescent materials, − specifically after doping with RE ions. ,− In this way, LMA finds applications in dosimeters for UV and ionizing radiation, and for the color adjustment of light-emitting diodes (LEDs). LMA doped with Mn 4+ has attracted particular attention due to its intense emission in the red and near IR region .…”

Section: Lanthanum Monoaluminate (Lma)mentioning

confidence: 99%

La-Doped Alumina, Lanthanum Aluminate, Lanthanum Hexaaluminate, and Related Compounds: A Review Covering Synthesis, Structure, and Practical Importance

Heveling

2023

Ind. Eng. Chem. Res.

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Advanced materials based on lanthanum–aluminum oxides are useful for many practical applications, not the least in catalysis, energy conversion and energy storage systems designed for a sustainable world economy. The three main La–Al–O (LAO) combinations of commercial interest are La-doped aluminas (LDA), lanthanum monoaluminate (LMA, a perovskite), and lanthanum hexaaluminate (LHA). Usually, the literature treats doped aluminas, perovskites, and hexaaluminates separately. The current review tries to identify common trends and features with respect to structure, synthesis, and applications of LAOs, which should lead to a more holistic understanding of their chemistry. This, in turn, should trigger innovative ideas with respect to new or improved applications. Apart from a variety of uses at low temperatures, the main advantages of LDA, LMA, LHA, and related compounds are their high-temperature stability and the extended applicability that comes with it.

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“…For the same target conditioned with different partial precursors, the predicted probabilities of precursors strongly depend on the given precursor and agree with some rules of thumb for precursor selection. When the partial precursors are oxides such as La 2 O 3 or Al 2 O 3 , the most probable precursors are predicted to be oxides for the other element, i.e., Al 2 O 3 for La 2 O 3 and La 2 O 3 for (31). When the partial precursors are nitrates such as La(NO 3 ) 3 or Al(NO 3 ) 3 , nitrates for the other element are prompted with higher probabilities, i.e., Al(NO 3 ) 3 for La(NO 3 ) 3 and La(NO 3 ) 3 for Al(NO 3 ) 3 (32).…”

Section: Fig 3 Representation Learning To Encode Synthesis Informatio...mentioning

confidence: 99%

Inorganic synthesis recommendation by machine learning materials similarity from scientific literature

He¹,

Huo²,

Bartel³

et al. 2023

Preprint

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Synthesis prediction is a key accelerator for the rapid design of advanced materials. However, determining synthesis variables such as the choice of precursor materials, operations, and conditions is challenging for inorganic materials because the sequence of reactions during heating is not well understood. In this work, we use a knowledge base of 29,900 solid-state synthesis recipes, text-mined from the scientific literature, to automatically learn which precursors to recommend for the synthesis of a novel target material. The data-driven approach learns chemical similarity of materials and refers the synthesis of a new target to precedent synthesis procedures of similar materials, mimicking human synthesis design. When proposing five precursor sets for each of 2,654 unseen test target materials, the recommendation strategy achieves a success rate of at least 82%. Our approach captures decades of heuristic synthesis data in a mathematical form, making it accessible for use in recommendation engines and autonomous laboratories. Short title AI learning inorganic synthesis from literature TeaserDecades of heuristic data are automatically captured for guiding successful synthesis of novel inorganic materials.

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Investigation of 515nm green-light emission for full color emission LaAlO3 phosphor with varied valence Eu

Cited by 25 publications

References 24 publications

Luminescent characteristics of Eu2+/Li+ doped (La-Al)2O3 phosphors and PMMA films activated with them

Luminescent characteristics of Eu2+/Li+ doped (La-Al)2O3 phosphors and PMMA films activated with them

La-Doped Alumina, Lanthanum Aluminate, Lanthanum Hexaaluminate, and Related Compounds: A Review Covering Synthesis, Structure, and Practical Importance

Inorganic synthesis recommendation by machine learning materials similarity from scientific literature

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