Structural and photoluminescence studies of red emitting CaTiO3:Eu3+ perovskite nanophosphors for lighting applications

Singh, Dhananjay; Manam, J.

doi:10.1007/s10854-016-5123-z

Cited by 37 publications

(8 citation statements)

References 43 publications

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“…Higher the critical distance higher will be the critical concentration of Eu 3+ ion. In a related perovskite host, CaTiO 3 , the observed critical concentration of Eu 3+ is 0.05 . In the present study, the value for the Na 0.5 Gd 0.5 TiO 3 host is slightly higher (0.075).…”

Section: Resultssupporting

confidence: 66%

Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

2018

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Na 0.5 Gd 0.5-x RE x TiO 3 (RE = Eu and Dy) phases with orthorhombic perovskite structure were synthesized by high temperature solid state reaction and the photoluminescence properties were investigated. The phase purity was confirmed by Rietveld refinement of the powder XRD patterns in Pnma space group. The band gap of the host was found to be 3.41 eV from UV/Vis diffuse reflectance spectrum. In the Eu 3 + doped phases, the 5 D 0 ! 7 F 2 electric dipole (ED) transition is predominant in the emission spectrum of Eu 3 + , under 397 nm excitation, and is in agreement with the non-centrosymmetric C s point group of the EuO 8 polyhedron. The critical concentration of the Eu 3 + was found to be x = 0.075 above which, concentration quenching occurs. Dy 3 + doping resulted in intense white light emission under 389 nm excitation.

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Section: Resultssupporting

confidence: 66%

Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

2018

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“…These processes lead numerous technological applications in different fields, such as red phosphors, light emitting diodes (LEDs), photonics, solar cells, tunable phosphors, temperature sensing, biological studies, drug kinetics, etc. [63, [75][76][77][78][79][80][81][82]. Figure 9 shows a block diagram for the lanthanide based perovskite phosphors, which shows their applications in various fields.…”

Section: Applications Of Perovskite Materialsmentioning

confidence: 99%

Synthesis Techniques and Applications of Perovskite Materials

Kumar¹,

Yadav²,

Monika³

et al. 2020

Perovskite Materials, Devices and Integration

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Perovskite material is a material with chemical formula ABX 3 -type, which exhibits a similar crystal structure of CaTiO 3 . In this material, A and B are metal cations with ionic valences combined to +6, e.g., Li + :Nb 5+ ; Ba 2+ :Ti 4+ ; Sr 2+ :Mn 4+ ; La 3+ :Fe 3+ , and X is an electronegative anion with ionic valence (−2), such as O 2− , S 2− , etc. The properties of a perovskite material strongly depend on the synthesis route of materials. The perovskite materials may be oxides (ABO 3 :CaMnO 3 ), halides (ABX 3 : X = Cl, Br, I), nitrides (ABN 3 :CaMoN 3 ), sulfides (ABS 3 :LaYS 3 ), etc., and they may exist in different forms, such as powders, thin films, etc. There are various routes for the synthesis of several perovskites, such as solid-state synthesis, liquid-state synthesis, gas-state synthesis, etc. In this chapter, we discuss various techniques for the synthesis of oxide perovskites in powder form using solid-, liquid-, and gas-state synthesis methods, and we also present an overview on the other type of perovskite materials. The X-ray diffraction, scanning electron microscopy, and optical techniques are used to study the purity of crystallographic phase, morphology, and photoluminescence properties of the perovskite materials. Some applications of different perovskite materials are also discussed.

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“…[6][7][8][9][10][11] Among them, the calcium titanate-based red phosphors have attracted much attention because of their excellent optical, electrical and thermal properties. [12][13][14][15][16][17][18][19][20][21][22] The rare-earth Eu 3+ ions doped in different host materials can be excited and emit red light because of their characteristic f-f transition. [23] It has been shown that calcium titanate (CaTiO 3 ) acts as an excellent host material for rare-earth ions doped phosphors, [24,25] and the photoluminescence (PL) performance is closely related to defects, morphology and synthesis methods of the phosphors.…”

Section: Introductionmentioning

confidence: 99%

“…Many new red phosphors like rare‐earth activated tungstate, molybdate, phosphate, vanadate and titanate compounds have been explored . Among them, the calcium titanate‐based red phosphors have attracted much attention because of their excellent optical, electrical and thermal properties …”

Section: Introductionmentioning

confidence: 99%

“…To prepare red phosphors with a perfect crystal structure and high emission efficiency is essential for practical applications. Different methods have been explored to synthesize rare‐earth‐doped CaTiO 3 phosphors, including chemical co‐precipitation, sol‐gel, solution combustion, and hydrothermal/solvothermal synthesis . Among them, the solvothermal synthesis shows several advantages in precise controlling of the size, shape distribution and crystallinity of metal oxides.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles

et al. 2018

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In this article Ca TiO :xEu single crystalline particles with a cubic morphology and average size of 248 to 815 nm were synthesized by a solvothermal method. The structural and optical properties of the Ca TiO :xEu cubes were investigated, the formation mechanism of the cubes were analyzed and discussed, and the influence of Eu doping content and cubic size on the photoluminescence were examined. The differences in the photoluminescence between Ca TiO :xEu cubic crystals and nanoparticles was analyzed. It was found that an addition of a small amount of water can substantially reduce the size of the cubes. An obvious red emission band centered at 615 nm was observed under the excitation at 395 nm for the cubes. Our results demonstrate CaTiO cubes are good host materials for designing red phosphors.

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Structural and photoluminescence studies of red emitting CaTiO3:Eu3+ perovskite nanophosphors for lighting applications

Cited by 37 publications

References 43 publications

Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

Synthesis Techniques and Applications of Perovskite Materials

Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles

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Structural and photoluminescence studies of red emitting CaTiO3:Eu3+ perovskite nanophosphors for lighting applications

Cited by 37 publications

References 43 publications

Intense Photoluminescence Emission in Eu3+‐ and Dy3+‐ Doped Low‐Band Gap Perovskite Titanate, Na0.5Gd0.5TiO3

Intense Photoluminescence Emission in Eu3+‐ and Dy3+‐ Doped Low‐Band Gap Perovskite Titanate, Na0.5Gd0.5TiO3

Synthesis Techniques and Applications of Perovskite Materials

Synthesis and luminescence properties of cubic‐shaped Ca1‐xTiO3:Eu3+ particles

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Product

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Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

Intense Photoluminescence Emission in Eu³⁺‐ and Dy³⁺‐ Doped Low‐Band Gap Perovskite Titanate, Na_0.5Gd_0.5TiO₃

Synthesis and luminescence properties of cubic‐shaped Ca_1‐xTiO₃:Eu³⁺ particles