Piezoelectrically-induced stress-luminescence phenomenon in CaAl2O4:Eu2+

Wei, Yongbin; Wu, Zheng; Jia, Yanmin; Liu, Yongsheng

doi:10.1016/j.jallcom.2015.05.159

Cited by 19 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, twins, boundaries or planar defects are often found in low temperature form of these compounds mainly due to phase transitions [213,214]. Interestingly, when pulse loads P (

< 20

MPa) were applied to CaAl

_{2}

_{4}

: Eu

^{2 +}

, the instantaneous ML intensity I follows

I \propto prefixexp (() - 1 / \sqrt{P})

, which was argued to originate from electroluminescence upon piezoelectric field [93]. This different behaviour can provide insights for the mechanism of ML in this group of phosphors.…”

Section: Mechanoluminescent Compoundsmentioning

confidence: 99%

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

2018

View full text Add to dashboard Cite

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.

show abstract

“…Furthermore, twins, boundaries or planar defects are often found in low temperature form of these compounds mainly due to phase transitions [213,214]. Interestingly, when pulse loads P (

< 20

MPa) were applied to CaAl

_{2}

_{4}

: Eu

^{2 +}

, the instantaneous ML intensity I follows

I \propto prefixexp (() - 1 / \sqrt{P})

, which was argued to originate from electroluminescence upon piezoelectric field [93]. This different behaviour can provide insights for the mechanism of ML in this group of phosphors.…”

Section: Mechanoluminescent Compoundsmentioning

confidence: 99%

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

2018

View full text Add to dashboard Cite

show abstract

“…In 1998, Xu's group reported two classic elastic ML materials of ZnS: Mn 2+ and SrAl 2 O 4 :Eu 2+ , [10,11] and demonstrated their potential applications in stress distribution imaging, after which the upsurge of modern ML material science research arose. For more than 20 years, the exploration and development of ML materials have mainly focused on oxides (aluminates, [12][13][14][15] stannates, [16][17][18][19] titanates [20][21][22][23][24] ), sulfides [11,[25][26][27][28] and sulfur oxides. [29][30][31][32][33][34] By adjusting the host composition and crystal structure, changing the dopant ions and content, activating ion coexistence and growing heterojunctions, improved ML intensity, sensitivity and reduced ML threshold, and full coverage of ML spectrum of ultraviolet-visible-infrared (UV-Vis-IR) light have been realized.…”

Section: Introductionmentioning

confidence: 99%

“…For more than 20 years, the exploration and development of ML materials have mainly focused on oxides (aluminates, [ 12–15 ] stannates, [ 16–19 ] titanates [ 20–24 ] ), sulfides [ 11,25–28 ] and sulfur oxides. [ 29–34 ] By adjusting the host composition and crystal structure, changing the dopant ions and content, activating ion coexistence and growing heterojunctions, improved ML intensity, sensitivity and reduced ML threshold, and full coverage of ML spectrum of ultraviolet‐visible‐infrared (UV‐Vis‐IR) light have been realized.…”

Section: Introductionmentioning

confidence: 99%

Realizing Near Infrared Mechanoluminescence Switch in LAGO:Cr Based on Oxygen Vacancy

Wu,

Xiao,

Jiang

et al. 2024

Small

View full text Add to dashboard Cite

Mechanoluminescence (ML) materials are featured with the characteristic of “force to light” in response to external stimuli, which have made great progress in artificial intelligence and optical sensing. However, how to effectively enable ML in the material is a daunting challenge. Here, a Lu3Al2Ga3O12:Cr3+ (LAGO: Cr3+) near infrared (NIR) ML material peaked at 706 nm is reported, which successfully realizes the key to unlock ML by the lattice‐engineering strategy Ga3+ substitution for Al3+ to “grow” oxygen vacancy (Ov) defects. Combined with thermoluminescence measurements, the observed ML is due to the formation of defect levels and the ML intensity is proportional to it. It is confirmed by X‐ray photoelectron spectroscopy and electron paramagnetic resonance that such a process is dominated by Ov, which plays a crucial role in turning on ML in this compound. In addition, potential ML emissions from 4T2 and 2E level transitions are discussed from both experimental and theoretical aspects. This study reveals the mechanism of the change in ML behavior after cation substitution, and it may have important implications for the practical application of Ov defect‐regulated turn‐on of ML.

show abstract

Multiple Defect‐Induced High‐Resolution Near‐Infrared Mechanoluminescent Materials for Non‐Destructive Detection of Blood Glucose and Lipids

Wu,

Zhou,

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

Mechanoluminescence (ML) materials, known for their ability to convert mechanical energy into light, are increasingly recognized for their potential applications, such as in intelligent stress sensing, in vivo bioimaging, and stress non‐destructive monitoring. However, the low signal‐to‐noise ratio (SNR) and narrow‐band emission of single‐defect‐induced ML materials usually limit their biological‐related practical applications. Here, these limitations will be addressed by modulating the microstructure evolution in Y3Ga3MgSiO12:Cr3+ through the [Si4++Mg2+] → [Ga3++Ga3+] chemical substitution strategy. Density functional theory (DFT) calculation reveals the defect types and dynamic charge migration processes. In addition, Y3Ga3MgSiO12: Cr3+ with continuously distributed “shallow‐deep” defects (0.68–1.61 eV) can avoid persistent luminescence (PersL) and bright‐field environment interference. Herein, such high SNR near‐infrared broadband ML emission may provide a reliable way for high‐quality biological non‐destructive sensing and detection. Finally, benefiting from the different absorption of ML signals in glucose/lipid, one may find a novel non‐invasive blood glucose/lipid testing technology in patients.

show abstract

Piezoelectrically-induced stress-luminescence phenomenon in CaAl2O4:Eu2+

Cited by 19 publications

References 29 publications

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

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

Realizing Near Infrared Mechanoluminescence Switch in LAGO:Cr Based on Oxygen Vacancy

Multiple Defect‐Induced High‐Resolution Near‐Infrared Mechanoluminescent Materials for Non‐Destructive Detection of Blood Glucose and Lipids

Contact Info

Product

Resources

About