X-ray photoelectron spectroscopy study of CaS:Eu and SrS:Eu phosphors

Moonsup Han; S. J. Oh; Jong Hee Park; H. L. Park

doi:10.1063/1.352799

X-ray photoelectron spectroscopy study of CaS:Eu and SrS:Eu phosphors

Moonsup Han, S. J. Oh, Jong Hee Park, H. L. Park

Department of Physics

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22 Scopus citations

Abstract

The phosphors of alkali-earth sulfides SrS:Eu_x (x=0.05 and 0.10 mole per mole of SrS), SrSO:Eu_x (x=0.05), and CaS:Eu_x (x=0.0005, 0.05, and 0.10) were studied by x-ray photoelectron spectroscopy. The CaS:Eu phosphors were found to be stabilized against atmospheric water vapor and carbon dioxide by annealing at high temperature for several hours. The S 2p core level shows that the chemical state of sulfur changes abruptly from -2 to +6 between the annealing temperature of 900 and 1100 °C. The Ca core level, on the other hand, does not show much change depending on the annealing temperature. From the Eu 3d core-level spectra of SrS:Eu_x and CaS:Eu_x (x=0.10) phosphors, we confirm that the valence state of Eu in these phosphors is Eu³⁺.

Original language	English
Pages (from-to)	4546-4549
Number of pages	4
Journal	Journal of Applied Physics
Volume	73
Issue number	9
DOIs	https://doi.org/10.1063/1.352799
State	Published - 1993

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title = "X-ray photoelectron spectroscopy study of CaS:Eu and SrS:Eu phosphors",

abstract = "The phosphors of alkali-earth sulfides SrS:Eux (x=0.05 and 0.10 mole per mole of SrS), SrSO:Eux (x=0.05), and CaS:Eux (x=0.0005, 0.05, and 0.10) were studied by x-ray photoelectron spectroscopy. The CaS:Eu phosphors were found to be stabilized against atmospheric water vapor and carbon dioxide by annealing at high temperature for several hours. The S 2p core level shows that the chemical state of sulfur changes abruptly from -2 to +6 between the annealing temperature of 900 and 1100 °C. The Ca core level, on the other hand, does not show much change depending on the annealing temperature. From the Eu 3d core-level spectra of SrS:Eux and CaS:Eux (x=0.10) phosphors, we confirm that the valence state of Eu in these phosphors is Eu3+.",

author = "Moonsup Han and Oh, {S. J.} and Park, {Jong Hee} and Park, {H. L.}",

year = "1993",

doi = "10.1063/1.352799",

language = "English",

volume = "73",

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journal = "Journal of Applied Physics",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - X-ray photoelectron spectroscopy study of CaS:Eu and SrS:Eu phosphors

AU - Han, Moonsup

AU - Oh, S. J.

AU - Park, Jong Hee

AU - Park, H. L.

PY - 1993

Y1 - 1993

N2 - The phosphors of alkali-earth sulfides SrS:Eux (x=0.05 and 0.10 mole per mole of SrS), SrSO:Eux (x=0.05), and CaS:Eux (x=0.0005, 0.05, and 0.10) were studied by x-ray photoelectron spectroscopy. The CaS:Eu phosphors were found to be stabilized against atmospheric water vapor and carbon dioxide by annealing at high temperature for several hours. The S 2p core level shows that the chemical state of sulfur changes abruptly from -2 to +6 between the annealing temperature of 900 and 1100 °C. The Ca core level, on the other hand, does not show much change depending on the annealing temperature. From the Eu 3d core-level spectra of SrS:Eux and CaS:Eux (x=0.10) phosphors, we confirm that the valence state of Eu in these phosphors is Eu3+.

AB - The phosphors of alkali-earth sulfides SrS:Eux (x=0.05 and 0.10 mole per mole of SrS), SrSO:Eux (x=0.05), and CaS:Eux (x=0.0005, 0.05, and 0.10) were studied by x-ray photoelectron spectroscopy. The CaS:Eu phosphors were found to be stabilized against atmospheric water vapor and carbon dioxide by annealing at high temperature for several hours. The S 2p core level shows that the chemical state of sulfur changes abruptly from -2 to +6 between the annealing temperature of 900 and 1100 °C. The Ca core level, on the other hand, does not show much change depending on the annealing temperature. From the Eu 3d core-level spectra of SrS:Eux and CaS:Eux (x=0.10) phosphors, we confirm that the valence state of Eu in these phosphors is Eu3+.

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U2 - 10.1063/1.352799

DO - 10.1063/1.352799

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EP - 4549

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

ER -

X-ray photoelectron spectroscopy study of CaS:Eu and SrS:Eu phosphors

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