Intense red photoluminescence and mechanoluminescence from Mn<sup>2+</sup>-activated SrZnSO with a layered structure

Yu, Zhou; Yang, Yun-Ling; Fan, Yuting; Yang, Woochul; Zhang, Wei-Bin; Hu, Jianfeng; Zhang, Zhijun; Zhao, Jingtai

doi:10.1039/c9tc02504a

Cited by 40 publications

(18 citation statements)

References 47 publications

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“…It is generally believed that the ThL peak is about 325–400 K, and the trap depth with 0.65–0.8 eV is the most beneficial for afterglow. [ 50 ] If the ThL peak and trap depth are higher than this range, the traps are too deep and carriers are not easily excited, which will result in shorter afterglow time at room temperature. On the contrary, if the trap depth are lower than this range, the trap is too shallow, and the binding force for carriers is too weak and the release is too fast, resulting in a short afterglow time.…”

Section: Resultsmentioning

confidence: 99%

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor

Yang

Yuan

et al. 2021

Advanced Optical Materials

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Mechanoluminescence (ML) is a classical optical phenomenon that is induced by mechanical stimulus, and it can be applied to stress sensors, imaging, self‐powered display/lighting and anti‐counterfeiting. However, the realization of determining the magnitude of stress in real time by the changes of colors for stress‐induced display/lighting has been fundamentally challenging. Herein, the superior manipulation of colors from blue to red continuously by pressure or concentration is achieved in Bi,Mn co‐activated CaZnOS for the first time. CaZnOS:Bi3+,0.1% Mn2+ exhibits the ML color from red, orange, white, and cyan with the pressure from 0 to 5000 N. Moreover, ML color manipulation from cyan to red light is also achieved with difference in Mn2+ concentration. It is of note that there is a reversible phase transition of CaZnOS according to in situ X‐ray diffraction and Raman spectra at high pressure. Moreover, the correlation between crystal structure and ML properties, as well as the ML mechanism are established and discussed in detail. In conclusion, the present results demonstrate the Bi,Mn co‐activated CaZnOS as a novel ML material achieving multi‐color manipulation with great potential applications in the fields of novel mechanically stress‐induced display, ultrasound monitoring, and particularly advanced anti‐counterfeiting technology.

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Section: Resultsmentioning

confidence: 99%

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor

Yang

Yuan

et al. 2021

Advanced Optical Materials

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“…Single-phase SrZn 2 OS 2 was first synthesized in 2018 by Loye and co-workers in a eutectic KF-KCl flux at 900 °C . The SrZnOS:Mn 2+ and SrZn 2 OS 2 :Mn 2+ crystals largely resemble the ML performances of the CaZnOS:Mn 2+ counterpart as revealed by several independent studies. , …”

Section: Emerging Host Materials For MLmentioning

confidence: 96%

“…43 The SrZnOS:Mn 2+ and SrZn 2 OS 2 :Mn 2+ crystals largely resemble the ML performances of the CaZnOS:Mn 2+ counterpart as revealed by several independent studies. 44,45 The BaZnOS compound was first discovered by Clarke in 2005 in an attempt to synthesize Ba 2 ZnO 2 Cu 2 S 2 . 46 BaZnOS adopts the orthorhombic phase with a centrosymmetric crystal structure, in which vertex-linked [ZnO 2 S 2 ] tetrahedra layers are separated by Ba 2+ ions (Figure 3a).…”

Section: Quaternary Oxysulfidesmentioning

confidence: 99%

Expanding the Toolbox of Inorganic Mechanoluminescence Materials

2021

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Metrics & MoreArticle Recommendations CONSPECTUS: Mechanoluminescence is a process of light emission from materials in response to external mechanical actions. As mechanical energy is ubiquitously available in nature, mechanoluminescence can provide sustainable solutions to challenging problems in the fields of biology and optoelectronics as well as energy and environmental sciences. In particular, remote delivery of light through mechanoluminescence can also be achieved by noncontact forces from ultrasonic waves and magnetic fields, which enables noninvasive diagnosis and therapy in biomedical applications. Owing to the well-recognized merits, the research of mechanoluminescence has evolved into a highly interdisciplinary field, which in turn has inspired considerable interest in the development of novel mechanoluminescence materials and devices for boosting the emission performances such as brightness, repeatability, and spectral tunability. Mechanoluminescence was originally observed in processes associated with fracture and plastic deformation of materials, which are characterized by inefficient and nonreproducible light emissions. Therefore, current research is mainly directed to repeatable mechanoluminescence through elastic deformation for the continuous generation of light. Such elastico-mechanoluminescence is primarily observed in host materials with piezoelectricity and doped with activator ions such as manganese and lanthanide. Upon the application of mechanical stress, the piezoelectric hosts establish internal electric fields that trigger electronic transitions between the dopant-associated energy levels, eventually giving rise to light emissions from the dopant ions. On the basis of the learned knowledge, various host/dopant combinations have been synthesized and tested for mechanoluminescence in the past few years. Meanwhile, novel composite structures and devices incorporated with the mechanoluminescence materials have also been designed for an efficient light generation under different forms of mechanical actions, such as compressing, stretching, and rubbing. The significant progress in mechanoluminescence study has generated new opportunities for fundamental research and technological applications. To inspire and guide further investigations in this field, we systematically review emerging mechanoluminescence systems and their frontier applications. We focus on emerging host materials that have been identified to render bright mechanoluminescence with deliberately controlled emission characteristics, along with an analysis of the structure−property relationship in these materials. We also discuss innovative methodologies for translating mechanoluminescence into various cuttingedge device applications by precisely controlling the interaction of mechanoluminescence materials and their surrounding environments. We attempt to provide the rationale behind these developments, and simultaneously highlight future opportunities and challenges for mechanoluminescence.

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“…[ 16 ] These three quaternary piezophotonic materials MZnOS (M = Ca, Sr, Ba) all possess the layered crystal structure, which can effectively separate and transport electron–hole pairs, making it a suitable host lattice for generating intense photon emission under external mechanical stimuli. [ 30,31 ] In general, the crystal parameters can determine the optical properties of the material. Among them, CaZnOS adopts a polar, non‐centrosymmetric, hexagonal crystal structure (P6 3 mc, a = 3.75726 Å and c = 11.4013 Å) and is isostructural to SrZnOS (P6 3 mc, a = 3.90442 Å and c = 11.6192 Å).…”

Section: Resultsmentioning

confidence: 99%

Multiresponsive Emissions in Luminescent Ions Doped Quaternary Piezophotonic Materials for Mechanical‐to‐Optical Energy Conversion and Sensing Applications

Zhao

Peng

Bai

et al. 2021

Adv Funct Materials

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Visualization and noncontact sensing can be achieved based on multimode luminescent materials, which is essential to flexible optoelectronics, information encryption, and infrastructure monitoring. However, the development of optical sensors is primally limited by developing high-performance luminescent functional materials with energy conversion. Here, by codoping transition metal and lanthanide ions into quaternary piezophotonic semiconductors MZnOS (M = Ca, Sr, Ba) microcrystals, the efficient multimode luminescent materials are successfully synthesized. They can simultaneously respond to ultraviolet, near-infrared and stress, and exhibit completely different optical characteristics. Specifically, both composite film and block are prepared by mixing luminescent particles and polymers for mechanical-to-optical energy conversion. The developed composite based on mechanoluminescence can be utilized for visualizing pressure distribution, even E-signature, and anti-counterfeiting systems. In addition, temperature detection is researched based on upconversion emissions. The results suggest that these materials have great potential applications in advanced optical multimode sensors, which is of significance for integrated optoelectronic devices.

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Intense red photoluminescence and mechanoluminescence from Mn²⁺-activated SrZnSO with a layered structure

Abstract: Intense red emitting Mn2+-activated SrZnSO samples were synthesized by solid-state reaction at high temperature, and their photoluminescence and mechanoluminescence properties were investigated.

Cited by 40 publications

References 47 publications

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor

Expanding the Toolbox of Inorganic Mechanoluminescence Materials

Multiresponsive Emissions in Luminescent Ions Doped Quaternary Piezophotonic Materials for Mechanical‐to‐Optical Energy Conversion and Sensing Applications

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Intense red photoluminescence and mechanoluminescence from Mn2+-activated SrZnSO with a layered structure

Abstract: Intense red emitting Mn2+-activated SrZnSO samples were synthesized by solid-state reaction at high temperature, and their photoluminescence and mechanoluminescence properties were investigated.

Cited by 40 publications

References 47 publications

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi3+, Mn2+ for Anti‐Counterfeiting Device and Stress Sensor

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi3+, Mn2+ for Anti‐Counterfeiting Device and Stress Sensor

Expanding the Toolbox of Inorganic Mechanoluminescence Materials

Multiresponsive Emissions in Luminescent Ions Doped Quaternary Piezophotonic Materials for Mechanical‐to‐Optical Energy Conversion and Sensing Applications

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Intense red photoluminescence and mechanoluminescence from Mn²⁺-activated SrZnSO with a layered structure

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor

Time‐Resolved Bright Red to Cyan Color Tunable Mechanoluminescence from CaZnOS: Bi³⁺, Mn²⁺ for Anti‐Counterfeiting Device and Stress Sensor