Mechanoluminescence induced by elastic deformation of coloured alkali halide crystals using pressure steps

Chandra, B. P.

doi:10.1016/j.jlumin.2007.12.001

Cited by 45 publications

(30 citation statements)

References 30 publications

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“…(ii) The waveforms of ML induced by the application of load, release of load, and impulsive deformation of ZnS:Mn crystals are similar to the waveforms of the piezoelectric charges produced during application of load, release of load, and impulsive deformation, respectively, [22,47]. (iii) In dislocation electrostatic interaction model of elastico ML, the bending of dislocation segments causes the ML excitation, in which the total ML emission increases linearly with the stress because the bending increases linearly with stress [48]. In piezoelectrically-induced electron detrapping model, electrical energy which depends on the mechanical energy is responsible for the ML excitation.…”

Section: Mechanism Of the Elastico ML Of Zns:mn Nanoparticlesmentioning

confidence: 80%

Luminescence induced by elastic deformation of ZnS:Mn nanoparticles

Chandra

Yamada

et al. 2010

Journal of Luminescence

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111

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Section: Mechanism Of the Elastico ML Of Zns:mn Nanoparticlesmentioning

confidence: 80%

Luminescence induced by elastic deformation of ZnS:Mn nanoparticles

Chandra

Yamada

et al. 2010

Journal of Luminescence

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111

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“…quartz and some polymers, but the most efficient ML materials reported are persistent luminescent materials [6][7][8][9][10][11][12][13].…”

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confidence: 99%

Mechanoluminescence in BaSi2O2N2:Eu

et al. 2012

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Mechanoluminescence (ML), a general term for the phenomenon in which light emission occurs during any mechanical action on a solid, can be divided roughly into two classes: destructive ML and non-destructive ML. For practical use in high-end applications (e.g. pressure sensors), materials with non-destructive ML properties are preferred. This paper reports on the strong non-destructive ML in BaSi 2 O 2 N 2 :Eu. When irradiated in advance with UV or blue light, this phosphor shows intense blue-green light emission upon mechanical stimulation such as friction or pressure. The ML has an emission band peaking at 498 nm, which is about 4 nm red-shifted compared to the steady state photoluminescence. The origin of the ML is discussed and related to the persistent luminescence of BaSi 2 O 2 N 2 :Eu. The same traps are responsible for both the phenomena.Based on the occurrence of ML in this phosphor, we were able to derive that the predominant crystallographic structure of BaSi 2 O 2 N 2 :Eu belongs to space group Cmc2 1 .

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“…Chandra et al [9][10][11] have shown that the mechanical interaction between the moving dislocations and F-centers is responsible for the ML of coloured alkali halide crystals. Chandra and Bisen [12] have studied the ML induced by elastic deformation of coloured alkali halide crystals and recently Chandra [13] has reported in detail the ML induced by elastic deformation of coloured alkali halide crystals. In the recent past, Ohagaku et al [14,15] have made comparative study of the ML of X-irradiated and non-irradiated KCl:Ca crystals.…”

Section: Introductionmentioning

confidence: 99%

“…Several other parameters of the crystals can also be determined from the measurements of the plastico ML induced by the application of the loads on the crystals. In the past, our group has made the theoretical studies on the elastico ML and fracto ML of crystals [13,[17][18][19][20][21][22]. Fig.…”

Section: Introductionmentioning

confidence: 99%