Intense red luminescent materials of ternary Eu3+ complexes of oxide ligands for electroluminescent display devices

Bhagwan, Shri; Dalal, Anuj; Nehra, Kapeesha; Singh, Devender; Simantilleke, Anura Priyajith; Kumar, Sumit; Singh, Ishwar

doi:10.1016/j.ijleo.2019.164111

Cited by 43 publications

(6 citation statements)

References 20 publications

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“…[3][4][5] In light of this, a great deal of work has gone into creating new lighting sources, leading to the introduction of light-emitting diodes (LEDs) and white light-emitting diodes (w-LEDs) as solid-state lighting (SSL) sources. [6][7][8][9] Compared to traditional incandescent and halogen lights, LEDs and w-LEDs have the benets of low energy consumption, durability, extended life, the absence of mercury, and environmental friendliness. [10][11][12] Due to their benets, LEDs and w-LEDs have a wide variety of potential applications in the elds of display technology and lighting.…”

Section: Introductionmentioning

confidence: 99%

A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

Kumar,

Singh,

Kumar

2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

Kumar,

Singh,

Kumar

2024

RSC Adv.

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“…Among them, gadolinium disilicate (Gd 2 Si 2 O 7 ) phosphors classify themselves as a significant class of light‐harvesting nanomaterials because of their peculiar characteristics, viz., their nonhygroscopic nature, excellent thermal and chemical stability, wide band gap, and high density, which cast them as the best performers in disparate fields such as medical imaging, high‐energy physics, scintillators, fuel cells, white light‐emitting diodes (WLEDs), etc. [11, 12].…”

Section: Introductionmentioning

confidence: 99%

“…stability, wide band gap, and high density, which cast them as the best performers in disparate fields such as medical imaging, high-energy physics, scintillators, fuel cells, white light-emitting diodes (WLEDs), etc. [11,12]. Gd 2 Si 2 O 7 exhibits two different polymorphic forms, i.e.…”

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confidence: 99%

Structural, morphological, and optical characteristics of Gd₂Si₂O₇:Dy³⁺ nanophosphors for WLEDs

et al. 2023

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Yellowish‐white light‐emitting Gd2‐xSi2O7:xDy3+ (x = 1–5 mol%) nanophosphors were prepared using a solution combustion synthesis method. Fluorescence spectrophotometry and X‐ray diffraction measurements were performed to scrutinize the optical performances and phase recognition of the designated nanophosphors. The outcomes specified that the prepared phosphors were crystallized into a triclinic phase with a P‐1 space group. As the concentration of Dy3+ ions was increased, the unit‐cell volume decrease proportionally due to the replacement of large‐sized Gd3+ by small‐sized Dy3+ ions. Under ultraviolet excitation at 349 nm, emission spectra consisted of two pronounced emission lines at ~482 nm (blue line), ~578 nm (yellow line), and a relatively weaker emission at ~670 nm (red line) due to 4F9/2→6H15/2, 4F9/2→6H13/2, and 4F9/2→6H11/2 intraconfigurational transitions of Dy3+ ions, respectively. The evidence about the site symmetry around Dy3+ ions was examined by considering the ratio of yellow‐to‐blue emission intensity. The observed critical distance (Rc) value was ~20.56 Å (≫5 Å), which signified that energy transfer primarily occurred due to multipolar interaction. The obtained coordinates were close to the white region of the Commission Internationale de l'Éclairage chromaticity diagram, which marked a significant milestone in the development of white light‐emitting diodes.

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“…This bidentate 1,10-phenanthroline ligand forms chelates with metal ion which has played a significant role in the fabrication of emanating layer for various display devices [14,15]. We have synthesized series of luminescent complexes with organic chromophores that can be utilized as emitting material in illuminating source [16,17].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and optoelectronic investigations of 3,8-bis(3,4-(ethylenedioxy)thien-2-yl)-1,10-phenanthroline

Nehra

Dalal

Hooda

et al. 2021

J Mater Sci: Mater Electron

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1,10-Phenanthroline-based luminescent materials play an important role as an excellent class of optoelectronic materials due to their remarkable and novel attributes for optoelectronic applications. There is an enormous demand of luminescent materials in many fields. The foremost objective of this paper is to synthesize fluorescent derivatives of 1,10-phenanthroline. The electronic effect of the substituents on the heteroaromatic ligand has been reviewed in solid state. These ligands were characterized by electrochemical study and spectroscopically. The value of energy band gap is estimated to be 3.0-4.5 eV for synthesized compounds. Photophysical features were analyzed through photoluminescence spectrometer, which indicates a strong impact of the substituents on the photoluminescent properties of the phenanthroline ligand. Upon excitation in ultraviolet region, intense broad band appeared in emission spectra of synthesized compounds lie in visible region which is further supported by CIE color coordinates. The detailed explanation about the geometry and frontier molecular orbitals calculation was carried out with the help of Avogadro and ORCA software.

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Intense red luminescent materials of ternary Eu3+ complexes of oxide ligands for electroluminescent display devices

Cited by 43 publications

References 20 publications

A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

Structural, morphological, and optical characteristics of Gd₂Si₂O₇:Dy³⁺ nanophosphors for WLEDs

Spectroscopic and optoelectronic investigations of 3,8-bis(3,4-(ethylenedioxy)thien-2-yl)-1,10-phenanthroline

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Intense red luminescent materials of ternary Eu3+ complexes of oxide ligands for electroluminescent display devices

Cited by 43 publications

References 20 publications

A green light emissive LaSr2AlO5:Er3+ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

A green light emissive LaSr2AlO5:Er3+ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

Structural, morphological, and optical characteristics of Gd2Si2O7:Dy3+ nanophosphors for WLEDs

Spectroscopic and optoelectronic investigations of 3,8-bis(3,4-(ethylenedioxy)thien-2-yl)-1,10-phenanthroline

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A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

A green light emissive LaSr₂AlO₅:Er³⁺ nanocrystalline material for solid state lighting: crystal phase refinement and down-conversion photoluminescence with high thermal stability

Structural, morphological, and optical characteristics of Gd₂Si₂O₇:Dy³⁺ nanophosphors for WLEDs