Recent development of aluminate materials for solid state lighting

Muley, Aarti; Dhoble, Samiksha B.; Ramesh, P. Bala; Yadav, Ram Sagar; Dhoble, S.J.

doi:10.1016/j.progsolidstchem.2022.100347

Cited by 18 publications

(6 citation statements)

References 195 publications

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“…LMA doped with Mn 4+ has attracted particular attention due to its intense emission in the red and near IR region. 206 Red is one of the three primary colors to produce white LEDs. LaAlO 3 :Mn 4+ is also useful for LED light that stimulates plant growth in agriculture, and for optical data storage.…”

Section: Properties and Uses Of Lanthanum Monoaluminatementioning

confidence: 99%

“…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 . Red is one of the three primary colors to produce white LEDs.…”

Section: Lanthanum Monoaluminate (Lma)mentioning

confidence: 99%

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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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Section: Properties and Uses Of Lanthanum Monoaluminatementioning

confidence: 99%

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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“…The electrons from the ground state 6 A 1 excited to the above-mentioned energy levels and then relax to the lower excited energy state 4 T 1 and finally transition from 4 T 1 → 6 A 1 resulting in emission at 519 nm. The dominant peak is centered at 456 nm corresponding to the electronic transition of Mn 2+ in the host lattice from 6 A 1 → 4 T 2 .…”

Section: Photoluminescence Study 361 Excitation Spectramentioning

confidence: 99%

“…The wide band gap (3.8 eV) zinc aluminate has been extensively investigated with less surface acidity, high chemical-mechanical-thermal stability, and hydrophobicity [5]. Apart from some distinguished properties, doped spinel oxides are intensively researched out due to their ample scope in solid-state lighting and catalytic industry with fascinating characteristics [6]. In literature, many researchers have exposed the possibilities of doped spinel with enormous and potential applications in modern devices.…”

Section: Introductionmentioning

confidence: 99%

Insight into the crystalline structure, morphology, luminescence, and electrical conductivity of ZnAl₂O₄:xMn²⁺ (0 ≤ x ≤ 2.0 mol%) nanostructures

Goswami,

Rani,

Ahlawat

2023

Phys. Scr.

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The ZnAl2O4: xMn2+ (0 ≤ x ≤ 2.0 mol %) spinel nanostructures were prepared by citrate sol-gel technique. X-ray diffraction (XRD) was used to acquire pure spinel structure while the nano crystallinity was assessed by transmission electron microscopy (TEM) of annealed powder samples. The prominent shift in diffraction angle has been noticed in doped samples. The nanocrystalline size was calculated in the range of 25-30 nm and Williamson Hall diagram was used to assess the micro stresses present in the samples. FTIR revealed the corresponding functional groups and emphasized the characteristic compositional bonds of normal spine structure. The data of UV-Visible spectroscopy manifests that ultraviolet absorption and bandgap energies attain remarkably lower values in the doped samples. The green luminescence is obtained at 519 nm via direct excitation of Mn2+ energy level which is controlled by the concentration of dopant as well as nanocrystallite size. The electrical characterization inferred the enhanced conductivity of the doped sample in which Mn2+ ions act as donor of electrons. The modified physical and optical properties of ZnAl2O4 after doping strengthen the useability of prepared metal aluminates in the optoelectronic devices of the semiconductor industry.

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“…It is due to this aspiration that solid‐state lighting (SSL) has emerged as an active area of research for sustainable materials. [ 9–11 ]…”

Section: Introductionmentioning

confidence: 99%

Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

et al. 2023

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Samarium ion (Sm3+)‐doped alkali zinc alumino borosilicate (AZABS) glass was synthesized via quick melt quench technique. Various spectroscopic studies like optical absorption, photoluminescence (PL) emission, PL excitation, temperature‐dependent PL and PL decay kinetics were performed on the as prepared glass system. Under 402 nm excitation, three sharp bands at wavelengths 563, 599 and 645 nm corresponding to transitions 4G5/2 → 6H5/2, 6H7/2 and 6H9/2, respectively, can be seen in the PL emission spectra. The 0.25 mol% Sm3+ glass has the highest intensity for these emissions. The lanthanide interaction in the glass matrix is dipole–dipole in nature as was proven from Dexter's analysis. The direct bandgap of 0.25 mol% Sm3+‐doped AZABS glass was calculated to be 2.88 eV. The lifetimes of the as prepared glass range from 1.93 ms for the lowest concentration of Sm3+ to 0.75 ms for the highest. From temperature dependent PL studies, the activation energy for 0.25 mol% Sm3+‐doped AZABS glass was found to be 0.19 eV which shows high thermal stability of this glass. We propose to utilize these Sm3+‐doped AZABS glasses for white‐light emitting diodes (w‐LEDs) and solid‐state lighting (SSL) applications.

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Recent development of aluminate materials for solid state lighting

Cited by 18 publications

References 195 publications

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

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

Insight into the crystalline structure, morphology, luminescence, and electrical conductivity of ZnAl₂O₄:xMn²⁺ (0 ≤ x ≤ 2.0 mol%) nanostructures

Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

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Recent development of aluminate materials for solid state lighting

Cited by 18 publications

References 195 publications

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

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

Insight into the crystalline structure, morphology, luminescence, and electrical conductivity of ZnAl2O4:xMn2+ (0 ≤ x ≤ 2.0 mol%) nanostructures

Thermally stable Sm3+‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications

Contact Info

Product

Resources

About

Insight into the crystalline structure, morphology, luminescence, and electrical conductivity of ZnAl₂O₄:xMn²⁺ (0 ≤ x ≤ 2.0 mol%) nanostructures

Thermally stable Sm³⁺‐doped alkali zinc alumino borosilicate (AZABS) glass for warm white light generation and w‐LED applications