Emission mechanism in single and co-doped Tb:Eu:CaZnOS

Corpino, Riccardo; Angioni, Damiano; Satta, Jessica; Ugbo, Franca C.; Chiriu, Daniele; Carbonaro, Carlo Maria; Melis, Claudio; Stagi, Luigi; Ricci, Pier Carlo

doi:10.1016/j.jallcom.2021.159007

Cited by 10 publications

(7 citation statements)

References 35 publications

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“…These peaks correspond to the double degenerate vibration E modes, specifically the anti-symmetric E 2 mode and the symmetric E 1 mode. The region at lower wavenumbers (50 cm −1 -150 cm −1 ) is sensitive to the vibrations of heavier elements and can provide information about the presence of rare earth dopant elements in the sample [15]. 102 cm −1 , 124 cm −1 , and 272 cm −1 [20].…”

Section: Resultsmentioning

confidence: 99%

“…Among these, a specific place is held by CaZnOS whose mechanoluminescent properties were published for the first time only in 2013 and its first structural characterizations just 8 years earlier [13]. CaZnOS, doped (and co-doped) with rare earth elements such as Eu, Tb, Er, Pr, Sm, Er, and Tm, or with transition metals (Cu, Al, or Mn), is highly efficient both as a phosphor and as a mechanoluminescent material depending on the structural defects of the matrix and how the emitter element interacts with the defects themselves [14][15][16][17][18][19][20]. The structure can be easily doped with rare earth elements for the similar ionic radius of Ca, and, among the other Tb, represents one of the popular dopants of high green luminescence from its 5 D 4 − 7 F J transition (where J = 3, 4, 5, and 6), with a recombination time spanning from microseconds to milliseconds (ms-ms).…”

Section: Introductionmentioning

confidence: 99%

“…The structure can be easily doped with rare earth elements for the similar ionic radius of Ca, and, among the other Tb, represents one of the popular dopants of high green luminescence from its 5 D 4 − 7 F J transition (where J = 3, 4, 5, and 6), with a recombination time spanning from microseconds to milliseconds (ms-ms). Further, Tb 3+ is usually co-doped with other rare earth elements in a different host matrix, acting both as a sensitizer and activator [15,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…MAS has proven to be a practical method for synthesizing both pure and doped organic, inorganic, metallic, ceramic, polymer, composite, and sulfide phosphors [14,15], such as Y 2 O 3 :Eu 3+ [28], CaCO 3 :Eu 3+ [29], CaGd 2 (WO 4 ) 4 : Er 3+ /Yb 3+ [30], and Gd 2 O 2 S: Tb 3+ [31].…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the Mechanoluminescent Properties of CaZnOS:Tb via Microwave-Assisted Synthesis: A Comparative Study with Conventional Thermal Methods

et al. 2023

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Recent developments in lighting and display technologies have led to an increased focus on materials and phosphors with high efficiency, chemical stability, and eco-friendliness. Mechanoluminescence (ML) is a promising technology for new lighting devices, specifically in pressure sensors and displays. CaZnOS has been identified as an efficient ML material, with potential applications as a stress sensor. This study focuses on optimizing the mechanoluminescent properties of CaZnOS:Tb through microwave-assisted synthesis. We successfully synthesized CaZnOS doped with Tb3+ using this method and compared it with samples obtained through conventional solid-state methods. We analyzed the material’s characteristics using various techniques to investigate their structural, morphological, and optical properties. We then studied the material’s mechanoluminescent properties through single impacts with varying energies. Our results show that materials synthesized through microwave methods exhibit similar optical and, primarily, mechanoluminescent properties, making them suitable for use in photonics applications. The comparison of the microwave and conventional solid-state synthesis methods highlights the potential of microwave-assisted methods to optimize the properties of mechanoluminescent materials for practical applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimizing the Mechanoluminescent Properties of CaZnOS:Tb via Microwave-Assisted Synthesis: A Comparative Study with Conventional Thermal Methods

et al. 2023

Self Cite

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“…As shown in the Raman spectra (Figure S2, Supporting Information), in the lower-energy range from 200 to 650 cm −1 , it depicts Raman-active modes at ≈269, 285, 365, and 539 cm −1 , which are characteristic of CaZnOS structure. [48,49] Moreover, the Raman-active modes at ≈322 and 394 cm −1 are characteristics of ZnS structure. [50] The two additional bands ≈495 and 1728 cm −1 are plausibly associated with the formation of the complex ZnS/CaZnOS heterojunction.…”

Section: Structural and Pl Properties At Ambient Conditionmentioning

confidence: 99%

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D‐Printed Polymers

Zheng,

Runowski,

Martín

et al. 2023

Advanced Materials

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Endowing a single material with various types of luminescence, that is, exhibiting a simultaneous optical response to different stimuli, is vital in various fields. A photoluminescence (PL)‐ and mechanoluminescence (ML)‐based multifunctional sensing platform is built by combining heterojunctioned ZnS/CaZnOS:Mn2+ mechano‐photonic materials using a 3D‐printing technique and fiber spinning. ML‐active particles are embedded in micrometer‐sized cellulose fibers for flexible optical devices capable of emitting light driven by mechanical force. Individually modified 3D‐printed hard units that exhibit intense ML in response to mechanical deformation, such as impact and friction, are also fabricated. Importantly, they also allow low‐pressure sensing up to ≈100 bar, a range previously inaccessible by any other optical sensing technique. Moreover, the developed optical manometer based on the PL of the materials demonstrates a superior high‐pressure sensitivity of ≈6.20 nm GPa−1. Using this sensing platform, four modes of temperature detection can be achieved: excitation‐band spectral shifts, emission‐band spectral shifts, bandwidth broadening, and lifetime shortening. This work supports the possibility of mass production of ML‐active mechanical and optoelectronic parts integrated with scientific and industrial tools and apparatus.

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Exploring Mechanoluminescence of Zinc Alkaline Earth Metal Oxysulfides from Fundamentals to Advanced Applications

Li,

Cai,

Chang

et al. 2024

Adv Funct Materials

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Mechanoluminescent (ML) materials convert mechanical stimuli into light emission, enabling applications in stress distribution visualization, structural health monitoring, biomechanical imaging, and sono‐optogenetics. Achieving efficient and full‐spectrum ML materials represents a long‐standing challenge. Zinc alkaline earth metal oxysulfides, namely CaZnOS, SrZnOS, BaZnOS, and SrZn2S2O, have emerged as prominent contenders in this field due to their exceptional ML properties. These materials feature low‐stress thresholds for emission activation, high ML intensity without the need for irradiation charging, and tunable spectra ranging from visible to near‐infrared, thus advancing ML research and broadening application possibilities. Here, a comprehensive review of the significant advancements made in ML research on zinc alkaline earth metal oxysulfides over the past decade, encompassing synthesis, characterization, mechanisms, and promising applications is presented. Special attention is focused on addressing conflicting reports on ML generation conditions, recent progress in accurately characterizing ML performance, and understanding mechanical‐to‐optical conversion processes. Future directions in fundamental ML research and the challenges in translating these advancements into practical applications are also discussed.

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Emission mechanism in single and co-doped Tb:Eu:CaZnOS

Cited by 10 publications

References 35 publications

Optimizing the Mechanoluminescent Properties of CaZnOS:Tb via Microwave-Assisted Synthesis: A Comparative Study with Conventional Thermal Methods

Optimizing the Mechanoluminescent Properties of CaZnOS:Tb via Microwave-Assisted Synthesis: A Comparative Study with Conventional Thermal Methods

Mechanoluminescence and Photoluminescence Heterojunction for Superior Multimode Sensing Platform of Friction, Force, Pressure, and Temperature in Fibers and 3D‐Printed Polymers

Exploring Mechanoluminescence of Zinc Alkaline Earth Metal Oxysulfides from Fundamentals to Advanced Applications

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