A Mechanoluminescent ZnS:Cu/Rhodamine/SiO<sub>2</sub>/PDMS and Piezoresistive CNT/PDMS Hybrid Sensor: Red-Light Emission and a Standardized Strain Quantification

Sohn, Kee‐Sun; Timilsina, Suman; Singh, Satendra Pal; Lee, Jin Woong; Kim, Ji Sik

doi:10.1021/acsami.6b12931

Cited by 49 publications

(22 citation statements)

References 44 publications

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“…Moreover, the integration of luminescence materials on stretchable substrates currently becomes an extensively investigated topic because they offer the characteristics of luminescence properties and the ability to be stretched into arbitrary shapes . Nowadays, the most studied stretchable devices are applied in artificial intelligence, artificial human skin, semiconductor device, and sensor . However, there are a few reports focusing on a stretchable anticounterfeiting device which can be integrated into polymer high‐value documents, providing an advanced anticounterfeiting feature.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Wang

Xia

et al. 2017

Adv Funct Materials

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The development of new luminescent materials for anticounterfeiting is of great importance, owing to their unique physical, chemical, and optical properties. The authors report the use of color‐tunable colloidal CdS/ZnS/ZnS:Mn2+/ZnS core/multishell quantum dots (QDs)‐functionalized luminescent polydimethylsiloxane film (LPF) for anticounterfeiting applications. Both luminescent QDs and as‐fabricated, stretchable, and transparent LPF show blue and orange emission simultaneously, which are ascribed to CdS band‐edge emission and the 4T1 → 6A1 transition of Mn2+, respectively; their emission intensity ratios are dependent on the power‐density of a single‐wavelength excitation source. Additionally, photoluminescence tuning of CdS/ZnS/ZnS:Mn2+/ZnS QDs in hexane or embedded in LPF can also be realized under fixed excitation power due to a resonance energy transfer effect. Tunable photoluminescence of these flexible LPF grafted doped core/shell QDs can be finely controlled and easily realized, depending on outer excitation power and intrinsic QD concentration, which is intriguing and inspires the fabrication of many novel applications.

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Section: Introductionmentioning

confidence: 99%

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Wang

Xia

et al. 2017

Adv Funct Materials

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“…This kind of materials can emit luminescence during elastic deformation without fracture . Using PDMS as substrates with high elastic moduli not only transfers mechanical stress effectively, but also ensures reproducible and durable devices, which used to be the limitation of rigid matrix ML materials . As can be seen from Figure d, they reported a wind‐driven ML device made of ZnS microparticles embedded in PDMS, which produced a significant brightness and emitted white light over a wide range of colors.…”

Section: Applicationsmentioning

confidence: 98%

“…ML could also be applied in mechanics and energy‐related applications, such as strain sensors . A novel personalized handwriting mapping was achieved by designing a flexible pressure sensor matrix (PSM).…”

Section: Applicationsmentioning

confidence: 99%

Design Principles and Material Engineering of ZnS for Optoelectronic Devices and Catalysis

Liu

Chen

et al. 2018

Adv Funct Materials

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ZnS, as one of the first semiconductors discovered and a rising material star, has embraced exciting breakthroughs in the past few years. To shed light on the design principles and engineering techniques of ZnS for improved/novel optoelectronic properties, the fundamental mechanisms and commonly employed strategies are proposed in this review. Recent progress on modifications of ZnS allows it to be extensively and effectively used in versatile applications, including transparent conductors, UV photodetectors, luminescent devices, and catalysis, which are clearly and comprehensively summarized in this work. Novel functional devices springing up from the newly developed ZnS-based materials are highlighted as well. This review not only provides a scientific insight into the advances of ZnS-based materials, but also touches on the future opportunities in this inspiring field.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201802029. relatively high charge recombination rate and low charge transport process inhibit the optoelectronic properties of ZnS as a high-performance photodetector. As a window layer of optoelectronic devices, a lack of high electrical conductivity typically hinders the practical use of ZnS in solar cells, photodiodes, light-emitting devices, etc. As a photocatalyst, the transparency of ZnS becomes a drawback as it suffers from a poor utilization of sunlight.There is not a perfect material, but the potential of developing a material is beyond limitation. The past few years have witnessed extensive designing and engineering of ZnS to explore its potentials in specific applications. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] This review summarizes the recent breakthroughs on ZnS-based materials as excellent candidates in optoelectronic devices, photocatalysis, and other novel functional devices. More importantly, it sheds light on the design principles and fundamental mechanisms of the improved performance of ZnS through strategies such as developing novel nanostructures, bandgap engineering, alloying with other materials, etc. To the best of our knowledge, it is the first comprehensive review on the design principles and material engineering of ZnS for novel/improved properties and intended applications. Briefly, current literature on a variety of ZnS-based structures was first summarized, ranging from 0D to 2D nanostructures. Then, the representative applications of ZnS-based materials are described, which are mainly consisted of four parts, as shown in Figure 1: transparent conductors, UV photodetectors, luminescent devices, and catalysis. Each part contains the latest design strategies of ZnS for the intended applications, fabrication techniques, representative examples, and the state-of-the-art devices. Finally, it outlines the challenges and opportunities in each field. In particular, we provide our perspectives on the future research directions of ZnS in energy and environment.

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“…New mechanism and models may emerge, for example electroluminescence triggered by triboelectricity was proposed for the peculiar ML behaviour of ZnS:Cu

^{+}

[122,334], and they are supposed to reveal common features of ML. Nevertheless, the role of defects is essential.…”

Section: Proposed Mechanism and Modelsmentioning

confidence: 99%

A Review of Mechanoluminescence in Inorganic Solids: Compounds, Mechanisms, Models and Applications

2018

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Mechanoluminescence (ML) is the non-thermal emission of light as a response to mechanical stimuli on a solid material. While this phenomenon has been observed for a long time when breaking certain materials, it is now being extensively explored, especially since the discovery of non-destructive ML upon elastic deformation. A great number of materials have already been identified as mechanoluminescent, but novel ones with colour tunability and improved sensitivity are still urgently needed. The physical origin of the phenomenon, which mainly involves the release of trapped carriers at defects with the help of stress, still remains unclear. This in turn hinders a deeper research, either theoretically or application oriented. In this review paper, we have tabulated the known ML compounds according to their structure prototypes based on the connectivity of anion polyhedra, highlighting structural features, such as framework distortion, layered structure, elastic anisotropy and microstructures, which are very relevant to the ML process. We then review the various proposed mechanisms and corresponding mathematical models. We comment on their contribution to a clearer understanding of the ML phenomenon and on the derived guidelines for improving properties of ML phosphors. Proven and potential applications of ML in various fields, such as stress field sensing, light sources, and sensing electric (magnetic) fields, are summarized. Finally, we point out the challenges and future directions in this active and emerging field of luminescence research.

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A Mechanoluminescent ZnS:Cu/Rhodamine/SiO₂/PDMS and Piezoresistive CNT/PDMS Hybrid Sensor: Red-Light Emission and a Standardized Strain Quantification

Cited by 49 publications

References 44 publications

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Design Principles and Material Engineering of ZnS for Optoelectronic Devices and Catalysis

A Review of Mechanoluminescence in Inorganic Solids: Compounds, Mechanisms, Models and Applications

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A Mechanoluminescent ZnS:Cu/Rhodamine/SiO2/PDMS and Piezoresistive CNT/PDMS Hybrid Sensor: Red-Light Emission and a Standardized Strain Quantification

Cited by 49 publications

References 44 publications

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

Design Principles and Material Engineering of ZnS for Optoelectronic Devices and Catalysis

A Review of Mechanoluminescence in Inorganic Solids: Compounds, Mechanisms, Models and Applications

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Product

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A Mechanoluminescent ZnS:Cu/Rhodamine/SiO₂/PDMS and Piezoresistive CNT/PDMS Hybrid Sensor: Red-Light Emission and a Standardized Strain Quantification