Warm white-light phosphor based on a single-phase of Ag+/Eu3+/Zn2+ loading SOD zeolites with application to white LEDs

Yao, Decui; Yang, Jing; Xie, Yangyang; Wang, Yuan; Wang, Yige; Li, Huanrong

doi:10.1016/j.jallcom.2020.153778

Cited by 22 publications

(17 citation statements)

References 47 publications

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“…For example, studies about the effect of counterbalancing cations (such as Na + , Li + , K + , and Cs + ) on the luminescence properties of Ag NCs inside zeolites indicated that Ag NCs exhibited shifted emission wavelength in the presence of different co-cations and showed high emission intensity in the Li + -exchanged zeolites. It is because Li + can allow more easily movement of Ag + to appropriate sites inside zeolite to form nanoclusters due to its small radius and meanwhile facilitate the stabilization of Ag NCs. ,, The tunable and white-light emissions were further achieved in silver-exchanged FAU, LTA, and SOD zeolites by tailoring the Ag + loading degree and thermal treatment condition, which showed potential application in LEDs. ,,,, It was reported that the Ag NCs confined inside Na- and Li-type LTA zeolites exhibited reversible on–off switching of their emission color or intensity in a hydration and dehydration cycle, making them very promising for application in humidity sensors. ,, Also, the detection of low content formaldehyde can be realized via colorimetric and fluorometric dual mode by monitoring the luminescent variation of the Ag NCs formatted in the Ag + -exchanged FAUY zeolite with mild thermal treatment …”

Section: Introductionmentioning

confidence: 99%

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺

Shi

et al. 2021

ACS Appl. Nano Mater.

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In this research, highly luminescent silver nanoclusters (Ag NCs) were prepared by using Na-FAUY zeolite as a scaffold to hinder their aggregation, and efficient energy transfer from Ag NCs to Tb3+ was realized in Ag+-Tb3+ dual-exchanged Na-FAUY zeolites and then proved by steady spectral and luminescence lifetime measurements. Furthermore, the effects of Ag+ loading amount, thermal treatment, and Tb3+ loading on the luminescence properties of Ag NCs were studied, and the optimized doping and preparing conditions were obtained. X-ray photoelectron spectroscopy together with spectral measurements indicated that the available sites for Tb3+ and Ag+ are competitive and Tb3+ doping may hinder the effective formation of Ag NCs. It is also indicated that the loading of Tb3+ may lead to reduced Si/Al ratios, which greatly influence the luminescence property and chemical state of Ag NCs, e.g., a high Si/Al ratio leads to blueshift emission and stronger ionic of Ag NCs. This research may benefit the design of Ag NCs-involved luminescent zeolites that have potential applications for photonic devices like LEDs and 3D displays.

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Section: Introductionmentioning

confidence: 99%

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺

Shi

et al. 2021

ACS Appl. Nano Mater.

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“…28 We achieved interesting white emission by heating Ag + , Eu 3+ and Zn 2+ co-doped SOD zeolite at 800 °C, packing the NUV-LED with which produced warm WLED devices with CIE color coordinates of (0.37, 0.35), a lower CCT of 4041 K, and a higher Ra of 87. 29 It is worth noting that we gain white emission in the silver-exchanged SOD zeolite under mild thermal treatment (100–300 °C), and the tunable emission from blue, yellow, and orange to warm white was realized by changing counterbalancing cations, thermal-treatment temperature and Ag loading. 30 As an extension of this work, herein we report the tunable luminescence of nanoclusters by adjusting Cs + and Ag + loadings within the SOD zeolite.…”

Section: Introductionmentioning

confidence: 94%

Tunable luminescence of silver-exchanged SOD zeolite thermally treated under mild conditions

Tian

Yao

et al. 2022

J. Mater. Chem. C

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“…Here, a single warm white lightemitting material was even developed, ascribed to an energy transfer mechanism between Ag-NCs and Eu 3+ . [40] Moreover, XPS showed the presence of both Ag + and Ag 0 species, attributed to silver nanoparticles and Ag 2 n+ . Additionally, the typical emission lines of Eu 2+ (5d-4f) were also spotted, supporting the energy transfer concept between Ag-NCs and the lanthanide.…”

Section: Role Of Water Molecules and Counter-balancing Cations As Optical Modulators Of Ag-ncsmentioning

confidence: 99%

“…[39] In contrast, the second strategy used co-emissive species (europium ions) and sensitization agents (zinc cations) to fabricate new singlecomponent warm white-emitting phosphors for NUV chip excited white LEDs (Figure 7d). [40] There is still further technological advances required to see the divide between the current state-of-the-art and working commercial LEDs prototypes based on silver-zeolite phosphors. Still, the attempts made so far have demonstrated not only strong potential for efficient devices but also versatile spectral properties.…”

Section: Toward the Development Of Tunable Single-phase Silver-zeolite Phosphors For Lighting Devicesmentioning

confidence: 99%

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Tunable Luminescence from Stable Silver Nanoclusters Confined in Microporous Zeolites

Romolini

Steele

Hofkens

et al. 2021

Advanced Optical Materials

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properties associated with nanoclusters' molecule-like structure and energetics. Most notably, metal nanoclusters rose to research prominence in connection to the discovery of outstanding optoelectronic properties and have found practical application within catalysis, bioimaging, lighting and molecular sensing. [1][2][3][4][5][6] However, nanocluster' stabilization remains a significant impediment owing to their tendency to merge and form ever-larger aggregates at the loss of their interesting properties. Therefore, research efforts have been devoted to developing novel synthetic strategies to stabilize isolated metal nanoclusters; [7] popular approaches have often taken the form of using organic scaffolds such as DNA/RNA, proteins, and polymers. [8][9][10][11][12][13][14][15][16] The use of organic molecules gives rise to high synthesis yields, good luminescence performance, and strong compatibility with living organism, making them excellent candidates as fluorophores. Unfortunately, a main drawback is their poor long-term stability, especially in solid form, hindering their application, e.g., within lighting devices. On the other hand, template-mediated strategies based on the self-organization of the metal nanocluster within a confined volume (so-called "ship-in-a-bottle" approach) provide a promising alternative, one where the size and shape of the final metal nanocluster are dictated by the spatial restrictions imposed by the rigid host nanostructure. [17] To date, common templating structures have included glass matrices, [18] metal-organic frameworks, [19] and porous aluminosilicate zeolite crystals. [20] Here, we will shine light on zeolites as a promising scaffold for the assembly of highly luminescent and functional silver nanoclusters (Ag-NCs) within their (nano)porous interior (Figure 1a-c). As a host framework, zeolites possess molecular-sized channels and cages which enable them to confine molecules or metal (oxide) clusters inside their crystalline interior in a controlled fashion. Moreover, the framework is negatively charged, requiring counter-balancing extra-framework cations, which can be easily replaced through simple exchange methods. As shown in Figure 1d, forming the caged Ag-NCs involves a scalable bottom-up approach, whereby Ag + ions are made to self-assemble into nanoclusters via energy-driven activation (thermal treatment, photoactivation, or X-rays irradiation). Once the cluster is assembled, its optical response can be further tuned by the intentional exchange of additional guest

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Warm white-light phosphor based on a single-phase of Ag+/Eu3+/Zn2+ loading SOD zeolites with application to white LEDs

Cited by 22 publications

References 47 publications

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺

Tunable luminescence of silver-exchanged SOD zeolite thermally treated under mild conditions

Tunable Luminescence from Stable Silver Nanoclusters Confined in Microporous Zeolites

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Warm white-light phosphor based on a single-phase of Ag+/Eu3+/Zn2+ loading SOD zeolites with application to white LEDs

Cited by 22 publications

References 47 publications

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb3+

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb3+

Tunable luminescence of silver-exchanged SOD zeolite thermally treated under mild conditions

Tunable Luminescence from Stable Silver Nanoclusters Confined in Microporous Zeolites

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Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺

Confinement of Highly Luminescent Silver Nanoclusters in FAUY Zeolite: A Study on the Formation Effects of Silver Nanoclusters and the Sensitization of Tb³⁺