Intense red emitting mechanoluminescence from CaZnOS:Mn,Li with c-axis preferred orientation

Tu, Dong; Xu, Chao‐Nan; Fujio, Yusaku

doi:10.1142/s2010135x14500179

Cited by 27 publications

(17 citation statements)

References 16 publications

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“…While offering advantages over conventional stress sensing devices, the low ML intensity of composite materials could undermine their potential to monitor the structural health of buildings and bridges during daylight hours. To date, efforts to increase the intensity of ML of materials have focused on the crystal structures and trap levels of the ML material, for example by optimizing protocols to synthesize ML particles and coatings [17,19,137,150,152,164,166,208,240,[265][266][267][268][269][270][271][272][273][274][275] that include adjusting the composition deficiency (Section 2.2) [142,150,151,173], exposing the material to SHI irradiation (Section 4.7.1) [247], by substituting host ions in the crystal [94,95,194,[265][266][267] and co-doping crystals with rare earth or transition metal ions [87,88,91,92,123,231,248,249,[268][269][270][...…”

Section: Enhancement Of ML Intensitymentioning

confidence: 99%

“…The substitution of host ions in the crystal can also increase the intensity of ML, in part by creating additional traps at energy levels associated with ML in the crystal. ML materials of this class include (Ba,Ca)TiO 3 :Pr 3+ [143], (Sr,M)MgSi 2 O 7 :Eu 2+ (M = Ba, Sr, Ca) [95,265], CaZnOS:Mn 2+ ,Li + [274], (Sr,Ca,Ba) 2 SnO 4 :Sm 3+ ,La 3+ [266] and Sr 3 (Sn,Si/Ge) 2 O 7 :Sm 3+ [267].…”

Section: Substitution Of Host Ionsmentioning

confidence: 99%

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Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

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266

196

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Mechanoluminescence (ML) is generated during exposures of certain materials to mechanical stimuli. Many solid materials produce ML during their fracturing, however, the irreversibility of fracto-induced ML limits the practical applications of these materials. In 1999, Chao-Nan Xu discovered an intense and reproducible ML from trap-controlled materials, including ZnS:Mn 2+ and SrAl 2 O 4 :Eu 2+ , and introduced the principles and applications of hybrid inorganic/organic mechanoluminescent (ML) composites, and related sensors to visualize stress/strain in target structures. This discovery has triggered intense research interest in trap-controlled ML materials and composites over the past 2 decades. Notable achievements of this research include the development of trap-controlled materials that exhibit bright ML emission from the ultraviolet to the near infra-red, and multiscale mechano-optical sensitivities. This research has also increased our understanding of the mechanisms of ML phenomena, enabling the rational design of trap-controlled ML materials. Practical applications of ML are also being driven by the discovery that ML composites can serve as "mechano-optical sensitive skin" for structural health diagnosis, stress sensors for biomechanics, and mechanically-activated light sources. This review focuses on the design, synthesis, characterization, optimization and application of trap-controlled ML materials, and concludes with discussions on future directions of ML research and specific challenges to improve ML materials for real-world applications.

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Section: Enhancement Of ML Intensitymentioning

confidence: 99%

Section: Substitution Of Host Ionsmentioning

confidence: 99%

Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

Self Cite

266

196

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show abstract

“…This should be attributed to such high ML sensitivity of CaZnOS (d 33 = 38 pm/V). This is reasonable from a certain point of view, and CaZnOS has indeed been proven to be one of the most classic ML hosts after ZnS with many published works within the visible range ( Tu et al., 2014 , 2015 ; Wang et al., 2017 ; Zhang et al., 2013 , 2015 ). Except for this, another impactful work was also reported based on CaZnOS in 2018, which realized multicolor luminescence from visible to NIR range (∼270–1000 nm, Figure 3 ) ( Du et al., 2018 ).…”

Section: Known Nir Mechanoluminescent Crystalsmentioning

confidence: 60%

Near-infrared mechanoluminescence crystals: a review

2021

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“…The main diffraction peaks at 28.054°, 58.017°as well as the negligible peak at 26.450°corresponding to (004), (008), and (112) plane, respectively, obviously demonstrated the quasi-single crystal BWOE thin films grown along the main plane (00k). 29,30 Such high quality thin films on common substrate with intrinsic lattice mismatches mainly attributed to the effective stress release of polymer firm-binding metal ions. 31,32 On the other hand, there are no traces of additional peaks from other phases including the RE ions.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Structural and Optical Investigations of Quasi-Single Crystal Eu³⁺-Doped BaWO₄ Thin Films

Deng

Chun

et al. 2018

Langmuir

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Scheelite-structure tungstates with unique structural features and excellent luminescence possess promising applications, such as light-emitting diodes (LEDs), scintillators, and displays. The controllable growth of high quality and uniform composition thin films mounted on cheap substrates is a key factor to realize the above commercial applications, however, which is also a big challenge due to the difficult stress release stemming from intrinsic lattice mismatches. Here, we employed the simple and composition-controlled polymer-assisted deposition (PAD) method to successfully obtain a series of high quality and well-proportioned BaWO:Eu (BWOE) thin films with red emission. Screening out the unbound freedom metal ions by poly(ether imide) (PEI) and ethylene diamine tetraacetic acid (EDTA), the firmly bound metal ions (Ba, W and Eu) in polymer solution were applied to accurately control the chemical composition and effectively governed the release of stress during the growth process of BWOE thin films. Furthermore, XRD, SEM and EDS mapping detections evidently authenticated the quasi-single crystallinity, uniform morphology and well-distributed composition of as-grown thin films. Additionally, excited by 250 nm light, these thin films could efficiently produce the red emission, peaked at around 612 nm originated from the D → F transition of Eu. Moreover, the optimal doping concentration of thin films was confirmed to be 9% and corresponding Commission International de l'Eclairage (CIE) chromaticity coordinate was (0.618, 0.365), which evidently implied the excellent color rending index. Therefore, this work highlights the rather superior PAD method to prepare uniform and high-quality BWOE thin films, which can be expanded toward the other photoelectric devices including white lighted-emitting diodes, scintillators, displays, and photoelectric detectors.

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Intense red emitting mechanoluminescence from CaZnOS:Mn,Li with c-axis preferred orientation

Cited by 27 publications

References 16 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Near-infrared mechanoluminescence crystals: a review

Structural and Optical Investigations of Quasi-Single Crystal Eu³⁺-Doped BaWO₄ Thin Films

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Intense red emitting mechanoluminescence from CaZnOS:Mn,Li with c-axis preferred orientation

Cited by 27 publications

References 16 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Near-infrared mechanoluminescence crystals: a review

Structural and Optical Investigations of Quasi-Single Crystal Eu3+-Doped BaWO4 Thin Films

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Structural and Optical Investigations of Quasi-Single Crystal Eu³⁺-Doped BaWO₄ Thin Films