The NaCl:Cu+ de-excitation mechanism revisited

Bosi, L.; Gallo, D.; Zelada, Marco

doi:10.1016/0009-2614(96)00116-9

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…In the tables and figures of our previous papers [21][22][23][24] (in which more experimental details are described) we presented every data concerning lifetime, temperature, fitting values, quantum yield in order to facilitate the reader understanding (in the case of interest in a different theoretical analysis of matter).…”

Section: Methodsmentioning

confidence: 99%

“…Subsequently, Bosi et al [21] evidenced that the tðTÞ data cannot be fitted by (2) in the whole investigated T-range (18-315 K); since the relative quantum yield was verified [21] to be constant in such T range, the possibility of a progressive change as a function of T was suggested, concerning the on-off configuration of Cu þ in its RES. In fact, two different fits of tðTÞ data were obtained at low and high T characterized by different D values (for instance, D ¼ 6:7 meV at low T and D ¼ 17:2 meV at high T).…”

Section: Lifetimementioning

confidence: 99%

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Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Bosi

Gallo

et al. 2001

phys. stat. sol. (b)

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A review of the relevant data concerning the decay properties of the Cu þ fluorescence in alkali halides is presented. A critical analysis of the experiments reported in literature shows that the problem of the correct and complete interpretation of the Cu þ fluorescence was made complicated in the past essentially because of historical reasons. The validity of the decay models was ascertained by the authors by simultaneously detecting both lifetime and quantum yield during each set of measurements as a function of the temperature.

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Section: Methodsmentioning

confidence: 99%

Section: Lifetimementioning

confidence: 99%

Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Bosi

Gallo

et al. 2001

phys. stat. sol. (b)

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“…32,33 The two 3 E g states are found to be close in energy, ≈ 80 cm −1 , which causes a temperature-dependent lifetime of the luminescence decay. 27,30,33,34 For NaCl:Ag + , the measured lifetimes are 18.6 μs and 0.31 ms for the partially spin-allowed [ 3 E g (T 2g )→ 1 A 1g ] and spin-forbidden [ 3 E g (T 1g )→ 1 A 1g ] transitions, respectively. The lower 3 E g (T 1g ) state is sometimes referred to as metastable.…”

Section: Discussionmentioning

confidence: 99%

Deep ultraviolet and visible crystalloluminescence of sodium chloride

Alexander

2012

The Journal of Chemical Physics

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A protocol has been developed for production of intense crystalloluminescence (XTL) from sodium chloride in aqueous solution by selective doping with transition metal salts (Ag(+), Cu(2+), and Dy(3+)). The method was used to record complete, fully dispersed deep UV-visible (200-650 nm) XTL spectra of sodium chloride for the first time. The results show conclusively that the emissions are due to dopant cations in the NaCl lattice, with no evidence for emission directly from NaCl, e.g., by triboluminescence resulting from crystalline fracture. The UV components of the XTL spectrum are attributed to single cation substituents (Ag(+) and Cu(+)), and a strong visible component (~415 nm) of the XTL is attributed to emission from silver-pair centers, (Ag(+))(2). The nature of the electronic transitions of the dopant cations is discussed. The results suggest that the timescale for transformation of a cluster to the crystalline phase is rapid, with efficient relaxation to the lowest excited electronic states of the dopant cation. This transformation is followed by photoemission of the cation in the nascent crystal.

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“…The methods for incorporating monovalent Cu have not been systematically worked out, e.g. in several works results on Cu + emission in alkali halides were mentioned (1–3) but the procedure adopted for incorporating Cu in monovalent form was not given. Bertolaccini et al .…”

Section: Introductionmentioning

confidence: 99%

Improvement of photoluminescence of Cu⁺ ion in Li₂SO₄

Puppalwar¹,

Dhoble

Kumar

2010

Luminescence

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The synthesis of the Li(2)SO(4) : Cu phosphor using a wet chemical method is reported here. The XRD technique showed the crystalline nature of the prepared material. The presence of Na and K in the host affected the observed photoluminescence characteristics of Li(2) SO(4) : Cu. Photoluminescent emission spectra of Li(2)SO(4) : Cu phosphor showed a very strong prominet peak at 387 nm in the indigo region due to 3d(9) 4 s(1) ↔ 3d(10) transition of the Cu(+) ion. The increase in peak intensity of the PL spectrum suggests that Cu(+) acts as the luminescence center in the present matrix.

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The NaCl:Cu+ de-excitation mechanism revisited

Cited by 10 publications

References 11 publications

Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Deep ultraviolet and visible crystalloluminescence of sodium chloride

Improvement of photoluminescence of Cu⁺ ion in Li₂SO₄

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The NaCl:Cu+ de-excitation mechanism revisited

Cited by 10 publications

References 11 publications

Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Review of Emission and Lifetime Data Concerning Cu+ Fluorescence in Alkali Halides

Deep ultraviolet and visible crystalloluminescence of sodium chloride

Improvement of photoluminescence of Cu+ ion in Li2SO4

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Product

Resources

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Improvement of photoluminescence of Cu⁺ ion in Li₂SO₄