Piezophotonics: Multiresponsive Emissions in Luminescent Ions Doped Quaternary Piezophotonic Materials for Mechanical‐to‐Optical Energy Conversion and Sensing Applications (Adv. Funct. Mater. 22/2021)

Zhao, Yingjie; Peng, Dengfeng; Bai, Gongxun; Huang, Youqiang; Xu, Shiqing; Hao, Jian

doi:10.1002/adfm.202170160

Cited by 15 publications

(19 citation statements)

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“…[ 3–11 ] In particular, by using the visible luminescent signals as the medium, ML could enable in situ, remote, distributed and visualized mechanics sensing for complex and irregular interfaces. [ 12–24 ] Therefore, ML is highly promising to develop the next‐generation stress sensing and monitoring technology. Nevertheless, most of the current ML materials intrinsically exhibit instantaneous luminescence with a short lifetime ranging from nanoseconds (ns) to microseconds (ms).…”

Section: Introductionmentioning

confidence: 99%

Self‐Charging Persistent Mechanoluminescence with Mechanics Storage and Visualization Activities

et al. 2022

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Persistent mechanoluminescence (ML) with long lifetime is highly required to break the limits of the transient emitting behavior under mechanics stimuli. However, the existing materials with persistent ML are completely trap‐controlled, and a pre‐irradiation is required, which severely hinders the practical applications. In this work, a novel type of ML, self‐charging persistent ML, is created by compositing the Sr3Al2O5Cl2:Dy3+ (SAOCD) powders into flexible polydimethylsiloxane (PDMS) matrix. With no need for any pre‐irradiation, the as‐fabricated SAOCD/PDMS elastomer could exhibit intense and persistent ML under mechanics stimuli directly, which greatly facilitates its applications in mechanics lighting, displaying, imaging, and visualization. By investigating the matrix effects as well as the thermoluminescence, cathodoluminescence, and triboelectricity properties, the interfacial triboelectrification‐induced electron bombardment processes are demonstrated to be responsible for the self‐charged energy in SAOCD under mechanics stimuli. Based on the unique self‐charging processes, the SAOCD/PDMS further exhibits mechanics storage and visualized reading activities, which brings novel ideas and approaches to deal with the mechanics‐related problems in the fields of mechanical engineering, bioengineering, and artificial intelligence.

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Section: Introductionmentioning

confidence: 99%

Self‐Charging Persistent Mechanoluminescence with Mechanics Storage and Visualization Activities

et al. 2022

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“…S2). It is worth noting that two different emission bands are from one luminescent centre, which has also been observed in many organics and inorganics [28][29][30][31], but is rare in the previously reported CaZnOS matrix. Different light intensity ratios were observed for the 620 and 465 nm main emission peaks when the samples were excited with 280 and 340 nm UV light, indicating that the energy level transitions of CaZnOS:Sb 3+ corresponding to excitation light are different [32].…”

Section: Resultsmentioning

confidence: 56%

“…The impurity phase disappeared when the doping concentration was 0.2%, indicating that the reaction was sufficient in this case. From the XRD diffraction peak, Sb 3+ ions enter the CaZnOS matrix below 2% doping concentration and do not markedly change the macro-crystalline structure of the CaZnOS host [28]. When the doping concentration of Sb 3+ exceeded 2 mol%, the Sb 2 O 3 phase peak appeared in the XRD pattern (Fig.…”

Section: Resultsmentioning

confidence: 93%

Broadband multimodal emission in Sb-doped CaZnOS-layered semiconductors

Zheng

et al. 2021

Sci. China Mater.

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Mechanoluminescent (ML) smart materials are expected to be used in stress sensors, new displays, and advanced flexible optoelectronic devices, because of their unique mechanical-to-light energy conversion properties. However, the narrow-range ML emission characteristics of single materials limit their application scope. In this work, we report on the broadband multimodal emission in Sb-doped CaZnOS layered semiconductors. A series of CaZnOS layer-structured powders with different Sb 3+ doping concentrations were synthesised using a high-temperature solid-phase method. The CaZnOS:Sb 3+ phosphor achieved a wide range of ML spectra (400-900 nm), adjustable photoluminescence with double luminescent peaks located at 465 and 620 nm, and the X-rayinduced luminescence characteristics were systematically studied. We have also achieved ultra-broad warm white light ML emission of Sb 3+ and Bi 3+ co-doped samples. Therefore, it can be expected that these ML phosphors will be used in smart lighting, displays, visible stress sensors, and X-ray imaging and detections.

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“…[ 13 ] Because no electrical energy is consumed, more scholars have focused on this research area, rendering ML a popular topic currently. [ 14–24 ] Qian et al. developed a flexible ML film by introducing a rigid ZnS:Mn 2+ /Cu + @Al 2 O 3 into a soft polydimethylsiloxane (PDMS) matrix and successfully captured the weak stimuli of moving skin, thus allowing stress visualization.…”

Section: Introductionmentioning

confidence: 99%

Stress‐Triggered Mechanoluminescence in ZnO‐Based Heterojunction for Flexible and Stretchable Mechano‐Optics

Cai

et al. 2023

Adv Funct Materials

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Owing to the forthcoming global energy crisis, the search for energy‐saving materials has intensified. Over the past two decades, mechanically induced luminescent materials have received considerable attention as they can convert waste into useful components, for instance, the conversion from stress into light. However, this material features many constraints that limit its widespread application. Herein, a strategy to improve the mechanoluminescence (ML) of ZnO by embedding it in a ZnF2:Mn2+ matrix is introduced. Upon dynamic excitation via an external stress, the reddish‐yellow ML is confirmed to originate from the 4T1 (4G) → 6A1 (6S) transition of the optically active Mn2+ center. Moreover, the sample with the strongest ML contains the appropriate amount of ZnF2 (ZnF2:ZnO = 7:3). By performing density functional theory calculations, a possible ML‐enhancement mechanism is elucidated, which indicates the formation of a ZnF2/ZnO:Mn2+ heterojunction. Considering the unique characteristics of ML, its promising applications are demonstrated in various mechano‐optics scenarios, including flexible and stretchable optoelectronics, advanced self‐powered displays, e‐skins/e‐signatures, and anti‐counterfeiting, without the use of external light/electric‐incentive sources. The study significantly increases the variety of ML materials and is expected to strengthen the foundation for the future development of smart mechanically controlled devices and energy‐saving systems.

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Piezophotonics: Multiresponsive Emissions in Luminescent Ions Doped Quaternary Piezophotonic Materials for Mechanical‐to‐Optical Energy Conversion and Sensing Applications (Adv. Funct. Mater. 22/2021)

Cited by 15 publications

References 0 publications

Self‐Charging Persistent Mechanoluminescence with Mechanics Storage and Visualization Activities

Self‐Charging Persistent Mechanoluminescence with Mechanics Storage and Visualization Activities

Broadband multimodal emission in Sb-doped CaZnOS-layered semiconductors

Stress‐Triggered Mechanoluminescence in ZnO‐Based Heterojunction for Flexible and Stretchable Mechano‐Optics

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