Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors

Pradip Bandyopadhyay; M. T. Jose; U. Madhusoodanan; B. S. Panigrahi

Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors

Pradip Bandyopadhyay, M. T. Jose, U. Madhusoodanan, B. S. Panigrahi

Division of Science (Berks)

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

The mechanism of Photo-stimulated Luminescence (PSL) is investigated in copper and europium doped KCl. Electron Paramagnetic Resonance, Photoluminescence, and X-ray Photoelectron Spectroscopy measurements were performed on powdered samples of KCl:Cu⁺ and KCl:Eu²⁺, γ-irradiated at room temperature. Our results show that the charge state conversion of Cu⁺ to Cu²⁺ does not take place after γ-irradiation in KCl:Cu, and that the observed PSL does not involve Cu²⁺-F recombination. In KCl:Eu²⁺, even though a significant reduction in Eu²⁺ concentration is detected after γ-irradiation, the PSL is not due to Eu³⁺-F recombination. The energy transfer from the recombination process involving F centers to the activator ions Cu⁺ and Eu²⁺ in KCl seems to cause the PSL in these materials.

Original language	English (US)
Pages (from-to)	45-50
Number of pages	6
Journal	Radiation Effects and Defects in Solids
Volume	149
Issue number	1 -4 pt 1
State	Published - Dec 1 1999
Event	Proceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98 - Keele, UK Duration: Jun 6 1998 → Jun 11 1998

All Science Journal Classification (ASJC) codes

Radiation
Nuclear and High Energy Physics
General Materials Science
Condensed Matter Physics

Cite this

@article{eb5e16c525cf4b4396cddc0f52a224d0,

title = "Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors",

abstract = "The mechanism of Photo-stimulated Luminescence (PSL) is investigated in copper and europium doped KCl. Electron Paramagnetic Resonance, Photoluminescence, and X-ray Photoelectron Spectroscopy measurements were performed on powdered samples of KCl:Cu+ and KCl:Eu2+, γ-irradiated at room temperature. Our results show that the charge state conversion of Cu+ to Cu2+ does not take place after γ-irradiation in KCl:Cu, and that the observed PSL does not involve Cu2+-F recombination. In KCl:Eu2+, even though a significant reduction in Eu2+ concentration is detected after γ-irradiation, the PSL is not due to Eu3+-F recombination. The energy transfer from the recombination process involving F centers to the activator ions Cu+ and Eu2+ in KCl seems to cause the PSL in these materials.",

author = "Pradip Bandyopadhyay and Jose, {M. T.} and U. Madhusoodanan and Panigrahi, {B. S.}",

year = "1999",

month = dec,

day = "1",

language = "English (US)",

volume = "149",

pages = "45--50",

journal = "Radiation Effects and Defects in Solids",

issn = "1042-0150",

publisher = "Taylor and Francis Ltd.",

number = "1 -4 pt 1",

note = "Proceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98 ; Conference date: 06-06-1998 Through 11-06-1998",

}

TY - JOUR

T1 - Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors

AU - Bandyopadhyay, Pradip

AU - Jose, M. T.

AU - Madhusoodanan, U.

AU - Panigrahi, B. S.

PY - 1999/12/1

Y1 - 1999/12/1

N2 - The mechanism of Photo-stimulated Luminescence (PSL) is investigated in copper and europium doped KCl. Electron Paramagnetic Resonance, Photoluminescence, and X-ray Photoelectron Spectroscopy measurements were performed on powdered samples of KCl:Cu+ and KCl:Eu2+, γ-irradiated at room temperature. Our results show that the charge state conversion of Cu+ to Cu2+ does not take place after γ-irradiation in KCl:Cu, and that the observed PSL does not involve Cu2+-F recombination. In KCl:Eu2+, even though a significant reduction in Eu2+ concentration is detected after γ-irradiation, the PSL is not due to Eu3+-F recombination. The energy transfer from the recombination process involving F centers to the activator ions Cu+ and Eu2+ in KCl seems to cause the PSL in these materials.

AB - The mechanism of Photo-stimulated Luminescence (PSL) is investigated in copper and europium doped KCl. Electron Paramagnetic Resonance, Photoluminescence, and X-ray Photoelectron Spectroscopy measurements were performed on powdered samples of KCl:Cu+ and KCl:Eu2+, γ-irradiated at room temperature. Our results show that the charge state conversion of Cu+ to Cu2+ does not take place after γ-irradiation in KCl:Cu, and that the observed PSL does not involve Cu2+-F recombination. In KCl:Eu2+, even though a significant reduction in Eu2+ concentration is detected after γ-irradiation, the PSL is not due to Eu3+-F recombination. The energy transfer from the recombination process involving F centers to the activator ions Cu+ and Eu2+ in KCl seems to cause the PSL in these materials.

UR - http://www.scopus.com/inward/record.url?scp=0033352453&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033352453&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0033352453

SN - 1042-0150

VL - 149

SP - 45

EP - 50

JO - Radiation Effects and Defects in Solids

JF - Radiation Effects and Defects in Solids

IS - 1 -4 pt 1

T2 - Proceedings of the 1998 8th Europhysical Conference on Defects in Insulating Materials, EURODIM 98

Y2 - 6 June 1998 through 11 June 1998

ER -

Mechanism of photo-stimulated luminescence in copper and Europium doped alkali halide phosphors

Abstract

All Science Journal Classification (ASJC) codes

Other files and links

Fingerprint

Cite this