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A review of mechanoluminescence in inorganic solids : compounds, mechanisms, models and applications

Ang Feng (UGent) and Philippe Smet (UGent)
(2018) MATERIALS. 11(4).
Author
Organization
Project
An embedded network of sensors in composites for local sensing (Enclose)
Project
Center for nano- and biophotonics (NB-Photonics)
Abstract
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.
Keywords
mechanoluminescence, elastic deformation, stress distribution sensing, mechanoluminescence mechanism, piezoelectricity, defects, persistent luminescence, ALKALI-HALIDE CRYSTALS, STRESS-INDUCED MECHANOLUMINESCENCE, FERROELECTRIC PHASE-TRANSITION, LONG-LASTING PHOSPHORESCENCE, WATER RESISTANCE BEHAVIOR, UBIQUITOUS LIGHT-SOURCE, RARE-EARTH IONS, MN THIN-FILMS, ELASTICO-MECHANOLUMINESCENCE, PERSISTENT LUMINESCENCE

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Citation

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Chicago
Feng, Ang, and Philippe Smet. 2018. “A Review of Mechanoluminescence in Inorganic Solids : Compounds, Mechanisms, Models and Applications.” Materials 11 (4).
APA
Feng, A., & Smet, P. (2018). A review of mechanoluminescence in inorganic solids : compounds, mechanisms, models and applications. MATERIALS, 11(4).
Vancouver
1.
Feng A, Smet P. A review of mechanoluminescence in inorganic solids : compounds, mechanisms, models and applications. MATERIALS. 2018;11(4).
MLA
Feng, Ang, and Philippe Smet. “A Review of Mechanoluminescence in Inorganic Solids : Compounds, Mechanisms, Models and Applications.” MATERIALS 11.4 (2018): n. pag. Print.
@article{8557255,
  abstract     = {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.},
  articleno    = {484},
  author       = {Feng, Ang and Smet, Philippe},
  issn         = {1996-1944},
  journal      = {MATERIALS},
  keyword      = {mechanoluminescence,elastic deformation,stress distribution sensing,mechanoluminescence mechanism,piezoelectricity,defects,persistent luminescence,ALKALI-HALIDE CRYSTALS,STRESS-INDUCED MECHANOLUMINESCENCE,FERROELECTRIC PHASE-TRANSITION,LONG-LASTING PHOSPHORESCENCE,WATER RESISTANCE BEHAVIOR,UBIQUITOUS LIGHT-SOURCE,RARE-EARTH IONS,MN THIN-FILMS,ELASTICO-MECHANOLUMINESCENCE,PERSISTENT LUMINESCENCE},
  language     = {eng},
  number       = {4},
  pages        = {56},
  title        = {A review of mechanoluminescence in inorganic solids : compounds, mechanisms, models and applications},
  url          = {http://dx.doi.org/10.3390/ma11040484},
  volume       = {11},
  year         = {2018},
}

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