Microscopic theory of elastico-mechanoluminescent smart materials

Chandra, B. P.; Chandra, Vivek; Jha, Piyush

doi:10.1063/1.4862655

Cited by 71 publications

(72 citation statements)

References 34 publications

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“…The total EML intensity of SrAl 2 O 4 :Eu,Dy phosphor has been found to increase linearly with (P-P th ) 2 . The ML intensity of SrAl 2 O 4 :Eu,Dy phosphor has been reported to increase linearly with the pressing rate [7]. Fig.…”

Section: Second Harmonic Generation (Shg) In Centric Crystalsmentioning

confidence: 98%

“…Thus, the external electric field F developed near the surface of crystals will be, 1.08 Â 10 6 V m À 1 ¼3.6 Â 10 3 V cm À 1 . As the detrapping of charge carriers needs an external electric field of the order of 10 5 V cm À 1 [5][6][7]59] and the impact ionization needs an internal electric field of the order of 10 6 V cm À 1 [5][6][7]60,61], the external bulk piezoelectric field of the order of 3.6 Â 10 3 V cm À 1 produced by the threshold pressure may not cause the detrapping and impact ionization. The appearance of elastico ML by the threshold pressure of 1 Â 10 6 N m À 2 in crystals indicates that the local piezoelectric field near Mn 2 þ ions in ZnS:Mn crystals should be nearly 10 times higher, where the piezoelectric constant should be high.…”

Section: Mechanism Of Elastico-mechanoluminescence Of Persistent Lumimentioning

confidence: 99%

“…This fact indicates the trapping of charge carriers during the exposure of SrAl 2 O 4 :Eu phosphors to UV-light. The EML measurements were made using the method described in our previous paper [7]. Fig.…”

Section: Second Harmonic Generation (Shg) In Centric Crystalsmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10]. Jeong et al [8][9][10] have demonstrated that the composite film containing ZnS:Cu, Mn and ZnS:Cu phosphors in a polydimethylsiloxane (PDMS) matrix can be used to produce light source, multicolour displays, and wind-driven light sources.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Elastico-mechanoluminescence and crystal-structure relationships in persistent luminescent materials and II–VI semiconductor phosphors

Chandra

Jha

2015

Physica B: Condensed Matter

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Section: Second Harmonic Generation (Shg) In Centric Crystalsmentioning

confidence: 98%

Section: Mechanism Of Elastico-mechanoluminescence Of Persistent Lumimentioning

confidence: 99%

Section: Second Harmonic Generation (Shg) In Centric Crystalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elastico-mechanoluminescence and crystal-structure relationships in persistent luminescent materials and II–VI semiconductor phosphors

Chandra

Jha

2015

Physica B: Condensed Matter

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“…For example, Chandra etc. discuss systematically the relation between EML and piezoelectricity [8]. And Sohn etc.…”

Section: Introductionmentioning

confidence: 99%

Mechanoluminescence in (Sr,Ca,Ba) 2 SnO 4 :Sm 3+ ,La 3+ ceramics

Zhao

Chai

Wang

et al. 2016

Journal of Alloys and Compounds

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Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

Heggen

Joos

Feng

et al. 2022

Adv Funct Materials

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Glow-in-the-dark materials have been around for a long time. While formerly materials had to be mixed with radioactive elements to achieve a sufficiently long and bright afterglow, these have now been replaced by much safer alternatives. Notably strontium aluminate, SrAl 2 O 4 , doped with europium and dysprosium, has been discovered over two decades ago and since then the phosphor has transcended its popular use in watch dials, safety signage, or toys with more niche applications such as stress sensing, photocatalysis, medical imaging, or flicker-free light-emitting diodes. A lot of research efforts are focused on further improving the storage capacity of SrAl 2 O 4 :Eu 2+ ,Dy 3+ , including in nanosized particles, and on finding the underlying physical mechanism to fully explain the afterglow in this material and related compounds. Here an overview of the most important results from the research on SrAl 2 O 4 :Eu 2+ ,Dy 3+ is presented and different models and the underlying physics are discussed to explain the trapping mechanism at play in these materials.

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Microscopic theory of elastico-mechanoluminescent smart materials

Cited by 71 publications

References 34 publications

Elastico-mechanoluminescence and crystal-structure relationships in persistent luminescent materials and II–VI semiconductor phosphors

Elastico-mechanoluminescence and crystal-structure relationships in persistent luminescent materials and II–VI semiconductor phosphors

Mechanoluminescence in (Sr,Ca,Ba) 2 SnO 4 :Sm 3+ ,La 3+ ceramics

Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

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