Optical absorption, 31P NMR, and photoluminescence spectroscopy study of copper and tin co-doped barium-phosphate glasses

J. A. Jiménez, C. Zhao

Research output: Contribution to journalArticle

Abstract

The optical and structural properties of 50P2O5:50BaO glasses prepared by melting have been investigated for additive concentrations of 10 and 1 mol% of CuO and SnO dopants. Absorption and photoluminescence spectroscopies were employed in the optical characterization, whereas structural properties were assessed by 31P nuclear magnetic resonance (NMR) spectroscopy. Residual Cu2+ was detectable by absorption spectroscopy for the highest concentration of CuO and SnO. More prominently, the optical data suggests contributions from both twofold-coordinated Sn centers and Cu + ions to light absorption and emission in the glasses. The luminescence depends strongly on excitation wavelength for the highest concentration of dopants where a blue-white emission is observed under short-wavelength excitation (e.g., 260 nm) largely due to tin, while an orange luminescence is exhibited for longer excitation wavelengths (e.g., 360 nm) essentially due to Cu+ ions. On the other hand, dissimilar luminescent properties were observed in connection to Cu+ ions for the lowest concentration studied, as the copper ions were preferentially excited in a narrower range at shorter wavelengths near tin centers absorption. The structural analyses revealed the glass matrix to be composed essentially of Q2 (two bridging oxygens) and Q1 (one bridging oxygen) phosphate tetrahedra. A slight increase in the Q1/Q2 ratio reflected upon SnO doping alone suggests a major incorporation of tin into the glass network via P-O-Sn bonds, compatible with the 2-coordinated state attributed to the luminescent Sn centers. However, a significant increase in the Q1/Q2 ratio was indicated with the incorporation of copper at the highest concentration, consistent with a key role of the metal ions as network modifiers. Thus, the change in Cu+ optical properties concurs with different distributions of local environments around the ions induced by variation in metal ion concentration. Luminescence decay curve analyses were found in agreement with the presence of Cu+ ions in the glasses suggesting their existence in tetragonally-distorted octahedral sites.

Original languageEnglish (US)
Pages (from-to)469-475
Number of pages7
JournalMaterials Chemistry and Physics
Volume147
Issue number3
DOIs
StatePublished - Oct 15 2014
Externally publishedYes

Fingerprint

Photoluminescence spectroscopy
Tin
Barium
Light absorption
Nuclear magnetic resonance spectroscopy
barium
Copper
tin
phosphates
Phosphates
optical absorption
Ions
photoluminescence
Glass
copper
nuclear magnetic resonance
glass
spectroscopy
Luminescence
Wavelength

Keywords

  • A. Glasses
  • A. Optical materials
  • C. Nuclear magnetic resonance (NMR)
  • C. Photoluminescence spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Optical absorption, 31P NMR, and photoluminescence spectroscopy study of copper and tin co-doped barium-phosphate glasses. / Jiménez, J. A.; Zhao, C.

In: Materials Chemistry and Physics, Vol. 147, No. 3, 15.10.2014, p. 469-475.

Research output: Contribution to journalArticle

@article{1c86e62a9be146b2a226b0d45e5a33fd,
title = "Optical absorption, 31P NMR, and photoluminescence spectroscopy study of copper and tin co-doped barium-phosphate glasses",
abstract = "The optical and structural properties of 50P2O5:50BaO glasses prepared by melting have been investigated for additive concentrations of 10 and 1 mol{\%} of CuO and SnO dopants. Absorption and photoluminescence spectroscopies were employed in the optical characterization, whereas structural properties were assessed by 31P nuclear magnetic resonance (NMR) spectroscopy. Residual Cu2+ was detectable by absorption spectroscopy for the highest concentration of CuO and SnO. More prominently, the optical data suggests contributions from both twofold-coordinated Sn centers and Cu + ions to light absorption and emission in the glasses. The luminescence depends strongly on excitation wavelength for the highest concentration of dopants where a blue-white emission is observed under short-wavelength excitation (e.g., 260 nm) largely due to tin, while an orange luminescence is exhibited for longer excitation wavelengths (e.g., 360 nm) essentially due to Cu+ ions. On the other hand, dissimilar luminescent properties were observed in connection to Cu+ ions for the lowest concentration studied, as the copper ions were preferentially excited in a narrower range at shorter wavelengths near tin centers absorption. The structural analyses revealed the glass matrix to be composed essentially of Q2 (two bridging oxygens) and Q1 (one bridging oxygen) phosphate tetrahedra. A slight increase in the Q1/Q2 ratio reflected upon SnO doping alone suggests a major incorporation of tin into the glass network via P-O-Sn bonds, compatible with the 2-coordinated state attributed to the luminescent Sn centers. However, a significant increase in the Q1/Q2 ratio was indicated with the incorporation of copper at the highest concentration, consistent with a key role of the metal ions as network modifiers. Thus, the change in Cu+ optical properties concurs with different distributions of local environments around the ions induced by variation in metal ion concentration. Luminescence decay curve analyses were found in agreement with the presence of Cu+ ions in the glasses suggesting their existence in tetragonally-distorted octahedral sites.",
keywords = "A. Glasses, A. Optical materials, C. Nuclear magnetic resonance (NMR), C. Photoluminescence spectroscopy",
author = "Jim{\'e}nez, {J. A.} and C. Zhao",
year = "2014",
month = "10",
day = "15",
doi = "10.1016/j.matchemphys.2014.05.016",
language = "English (US)",
volume = "147",
pages = "469--475",
journal = "Materials Chemistry and Physics",
issn = "0254-0584",
publisher = "Elsevier BV",
number = "3",

}

TY - JOUR

T1 - Optical absorption, 31P NMR, and photoluminescence spectroscopy study of copper and tin co-doped barium-phosphate glasses

AU - Jiménez, J. A.

AU - Zhao, C.

PY - 2014/10/15

Y1 - 2014/10/15

N2 - The optical and structural properties of 50P2O5:50BaO glasses prepared by melting have been investigated for additive concentrations of 10 and 1 mol% of CuO and SnO dopants. Absorption and photoluminescence spectroscopies were employed in the optical characterization, whereas structural properties were assessed by 31P nuclear magnetic resonance (NMR) spectroscopy. Residual Cu2+ was detectable by absorption spectroscopy for the highest concentration of CuO and SnO. More prominently, the optical data suggests contributions from both twofold-coordinated Sn centers and Cu + ions to light absorption and emission in the glasses. The luminescence depends strongly on excitation wavelength for the highest concentration of dopants where a blue-white emission is observed under short-wavelength excitation (e.g., 260 nm) largely due to tin, while an orange luminescence is exhibited for longer excitation wavelengths (e.g., 360 nm) essentially due to Cu+ ions. On the other hand, dissimilar luminescent properties were observed in connection to Cu+ ions for the lowest concentration studied, as the copper ions were preferentially excited in a narrower range at shorter wavelengths near tin centers absorption. The structural analyses revealed the glass matrix to be composed essentially of Q2 (two bridging oxygens) and Q1 (one bridging oxygen) phosphate tetrahedra. A slight increase in the Q1/Q2 ratio reflected upon SnO doping alone suggests a major incorporation of tin into the glass network via P-O-Sn bonds, compatible with the 2-coordinated state attributed to the luminescent Sn centers. However, a significant increase in the Q1/Q2 ratio was indicated with the incorporation of copper at the highest concentration, consistent with a key role of the metal ions as network modifiers. Thus, the change in Cu+ optical properties concurs with different distributions of local environments around the ions induced by variation in metal ion concentration. Luminescence decay curve analyses were found in agreement with the presence of Cu+ ions in the glasses suggesting their existence in tetragonally-distorted octahedral sites.

AB - The optical and structural properties of 50P2O5:50BaO glasses prepared by melting have been investigated for additive concentrations of 10 and 1 mol% of CuO and SnO dopants. Absorption and photoluminescence spectroscopies were employed in the optical characterization, whereas structural properties were assessed by 31P nuclear magnetic resonance (NMR) spectroscopy. Residual Cu2+ was detectable by absorption spectroscopy for the highest concentration of CuO and SnO. More prominently, the optical data suggests contributions from both twofold-coordinated Sn centers and Cu + ions to light absorption and emission in the glasses. The luminescence depends strongly on excitation wavelength for the highest concentration of dopants where a blue-white emission is observed under short-wavelength excitation (e.g., 260 nm) largely due to tin, while an orange luminescence is exhibited for longer excitation wavelengths (e.g., 360 nm) essentially due to Cu+ ions. On the other hand, dissimilar luminescent properties were observed in connection to Cu+ ions for the lowest concentration studied, as the copper ions were preferentially excited in a narrower range at shorter wavelengths near tin centers absorption. The structural analyses revealed the glass matrix to be composed essentially of Q2 (two bridging oxygens) and Q1 (one bridging oxygen) phosphate tetrahedra. A slight increase in the Q1/Q2 ratio reflected upon SnO doping alone suggests a major incorporation of tin into the glass network via P-O-Sn bonds, compatible with the 2-coordinated state attributed to the luminescent Sn centers. However, a significant increase in the Q1/Q2 ratio was indicated with the incorporation of copper at the highest concentration, consistent with a key role of the metal ions as network modifiers. Thus, the change in Cu+ optical properties concurs with different distributions of local environments around the ions induced by variation in metal ion concentration. Luminescence decay curve analyses were found in agreement with the presence of Cu+ ions in the glasses suggesting their existence in tetragonally-distorted octahedral sites.

KW - A. Glasses

KW - A. Optical materials

KW - C. Nuclear magnetic resonance (NMR)

KW - C. Photoluminescence spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=84905679956&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84905679956&partnerID=8YFLogxK

U2 - 10.1016/j.matchemphys.2014.05.016

DO - 10.1016/j.matchemphys.2014.05.016

M3 - Article

AN - SCOPUS:84905679956

VL - 147

SP - 469

EP - 475

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

IS - 3

ER -