Structural and luminescence properties of tunable white-emitting Sr0.5Ca0.5Al2O4:Eu2+, Dy3+for UV-excited white-LEDs

Das, Subrata; Yang, Chang-Hao; Lin, Hsin-Cheng; Lu, Chung‐Hsin

doi:10.1039/c4ra09618e

Cited by 27 publications

(32 citation statements)

References 24 publications

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“…Therefore, the mass percentage of Dy(BA) 3 phen to PVP settled at 10 % was adopted to prepare the [Dy(BA) 3 phen ? Eu(BA) 3 [31]. The excitation intensity decreases by adding more Eu(BA) 3 phen complexes.…”

Section: Photoluminescence Propertiesmentioning

confidence: 94%

“…Thus the composite nanofibers consisted of Dy(BA) 3 phen, Eu(BA) 3 phen and PVP were successfully prepared. The obtained composite 3 phen. Au comes from the conductive film plated on the surface of the sample for SEM observation.…”

Section: Introductionmentioning

confidence: 99%

“…Benzoic acid (BA) and 1,10-phenanthroline (phen) are commonly used as ligands, which have many advantages such as high ultraviolet absorbance, high efficiency of energy transfer and low cost [11]. White light might be achieved by mixing Dy complex and Eu complex (Dy(BA) 3 phen and Eu(BA) 3 phen) through the appropriate combination because the mixture of Dy(BA) 3 phen and Eu(BA) 3 phen complexes can simultaneously emit blue, green and red light (three-primary colors). In addition, co-doping RE complexes enables the finetuning of the excitation and emission spectra of luminescent materials [12].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, rare earth (RE) ions doped color-tunable luminescent materials have been under extensive investigation due to their wide range of applications in many fields, such as white light-emitting diodes (WLEDs), flat panel displays, full-color displays based on electronic, optical, and chemical characteristics originated from their 4f electrons [1][2][3][4][5]. Hence, there is growing interest in developing color-tunable luminescent materials and white light-emitting materials for applications in display and lighting.…”

Section: Introductionmentioning

confidence: 99%

“…The morphologies and luminescence properties of the final products were studied, and some meaningful results were obtained. 3 phen were prepared, and the mass percentages of Dy(BA) 3 phen to PVP were settled as 10 %. The mass percentages of Eu(BA) 3 phen to PVP were 0, 0.3, 0.5, 1, 2, and 3 %, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Dy3+ and Eu3+ complexes co-doped flexible composite nanofibers to achieve tunable fluorescent color

Zhou

Dong

et al. 2015

J Mater Sci: Mater Electron

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Color-tunable flexible composite nanofibers containing Dy(BA) 3 phen and Eu(BA) 3 phen complexes have been successfully fabricated via a facile electrospinning process. Scanning electron microscopy, energy dispersive spectrometry and fluorescence spectroscopy were used to characterize the samples. The diameter of the composite nanofibers is 420.83 ± 6.55 nm. Tunable color from greenish blue to white to orange can be realized in a single flexible composite nanofiber by varying the mass ratio of Dy(BA) 3 phen-Eu(BA) 3 phen, and it is the first time to obtain white-light-emitting flexible nanofibers using rare earth complexes as luminescent centers. In particular, the composite nanofibers can respectively emit cool and warm white light with certain doping contents of Dy(BA) 3 phen and Eu(BA) 3 phen. The novel color-tunable composite nanofibers have potential applications in the fields of fluorescent lamps, field emission displays and color displays.

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Section: Photoluminescence Propertiesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dy3+ and Eu3+ complexes co-doped flexible composite nanofibers to achieve tunable fluorescent color

Zhou

Dong

et al. 2015

J Mater Sci: Mater Electron

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Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Yang

Gai

Ding

et al. 2023

Advanced Optical Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.202202382.the stored excitation energy in energy traps, which can be released by thermal stimulation. [2] Obviously, the process is very different from the real-time excited fluorescence (FL). Usually, the excitation source can be X-ray, ultraviolet (UV), and visible (Vis) light, and there is no need for continuous external light irradiation, while the PL may locate in UV, Vis, or near-infrared (NIR) spectral regions. [3] Especially, Vis emissions are easy to be modulated for colorful light, and NIR emissions in the biological window (≈650-1800 nm) offer deep tissue penetration and prevented autofluorescence. [3a,4] According to the outstanding luminescent properties, enormous opportunities in diverse application fields have been discovered, mainly including long-lasting tumor optical imaging and therapy, [5] security and anti-counterfeiting, [6] optical information and data storage, [7] photocatalysis, [8] fingerprint recognition, [6c] analysis and sensing, [1c,4a,9] as well as the potential applications of synaptic plasticity [10] and light-emitting diodes. [11] Retrieved from Web of Science, > 6800 articles by tracing the themes "afterglow" or "persistent luminescence" or "longlasting luminescence" have been published during the last decade (i.e., ≈2012-2022). Diverse categories of persistent luminescent materials have been developed, such as organic materials, [12] carbon dots, [13] metal-organic frameworks, [14] doped inorganic crystals et al. [2,15] Among them, organic afterglow materials, usually named as organic room temperature phosphorescence materials have recently drawn extensive attention due to the advantage of sustainable resources, low cost, and safety. [16] Based on the composition, organic afterglow materials can be mainly divided into organic small molecules, polymers, and organic-inorganic hybrids, which are normally related to the radiative transition from the lowest excited triplet state (T 1 ) to the ground state (S 0 ). Thus, methods for enhancing the intersystem crossing (ISC) rate are reasonable for realizing highly efficient afterglow, such as introducing heavy atoms, paramagnetic molecules, aromatic carbonyls, heteroatoms, and crystal engineering. [17] Recently, organic room-temperature phosphorescence with a high quantum yield above 56% and long afterglow lifetime longer than 22 s has been achieved by using suitable inorganic framework. [18] Additionally, color-tunable

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Design of Single-Phased Multicolor-Emission Phosphor for LED

Guo

Suo

2016

Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications

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Structural and luminescence properties of tunable white-emitting Sr_0.5Ca_0.5Al₂O₄:Eu²⁺, Dy³⁺for UV-excited white-LEDs

Cited by 27 publications

References 24 publications

Dy3+ and Eu3+ complexes co-doped flexible composite nanofibers to achieve tunable fluorescent color

Dy3+ and Eu3+ complexes co-doped flexible composite nanofibers to achieve tunable fluorescent color

Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Design of Single-Phased Multicolor-Emission Phosphor for LED

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