Nanostructure of Er3+ doped silicates

Nan Yao; Kirk Hou; Christopher D. Haines; Nathan Etessami; Varadh Ranganathan; Susan B. Halpern; Bernard H. Kear; Lisa C. Klein; George H. Sigel

doi:10.1093/jmicro/dfi040

Nanostructure of Er³⁺ doped silicates

Nan Yao, Kirk Hou, Christopher D. Haines, Nathan Etessami, Varadh Ranganathan, Susan B. Halpern, Bernard H. Kear, Lisa C. Klein, George H. Sigel

Princeton Materials Institute

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We demonstrate nanostructural evolution resulting in highly increased photoluminescence in silicates doped with Er³⁺ ions. High-resolution transmission electron microscopy (HRTEM) imaging, nano-energy dispersed X-ray (NEDX) spectroscopy, X-ray diffraction (XRD) and photoluminescence analysis confirm the local composition and structure changes of the Er³⁺ ions upon thermal annealing. We studied two types of amorphous nanopowder: the first is of the composition SiO₂/18Al₂O₃/2Er ₂O₃ (SAE), synthesized by combustion flame-chemical vapor condensation, and the second is with a composition of SiO₂/8Y ₂O₃/2Er₂O₃ (SYE), synthesized by sol-gel synthesis (composition in mol%). Electron diffraction and HRTEM imaging clearly show the formation of nanocrystallites with an average diameter of ∼8 nm in SAE samples annealed at 1000°C and SYE samples annealed at 1200°C. The volume fraction of the nanocrystalline phase increased with each heat treatment, eventually leading to complete devitrification at 1400°C. Further XRD and NEDX analysis indicates that the nanocrystalline phase has the pyrochlore structure with the formula Er_xAl_2-xSi ₂O₇ or Er_xY_2-xSi₂O ₇ and a surrounding silica matrix.

Original language	English (US)
Pages (from-to)	309-315
Number of pages	7
Journal	Journal of Electron Microscopy
Volume	54
Issue number	3
DOIs	https://doi.org/10.1093/jmicro/dfi040
State	Published - Jun 2005

All Science Journal Classification (ASJC) codes

Instrumentation

Keywords

Erbium
HRTEM
Nanocrystal
Nanopowder
Photoluminescence
Silicate
Waveguide

Access to Document

10.1093/jmicro/dfi040

Cite this

@article{751b8991750c4c989da651ebe0985219,

title = "Nanostructure of Er3+ doped silicates",

abstract = "We demonstrate nanostructural evolution resulting in highly increased photoluminescence in silicates doped with Er3+ ions. High-resolution transmission electron microscopy (HRTEM) imaging, nano-energy dispersed X-ray (NEDX) spectroscopy, X-ray diffraction (XRD) and photoluminescence analysis confirm the local composition and structure changes of the Er3+ ions upon thermal annealing. We studied two types of amorphous nanopowder: the first is of the composition SiO2/18Al2O3/2Er 2O3 (SAE), synthesized by combustion flame-chemical vapor condensation, and the second is with a composition of SiO2/8Y 2O3/2Er2O3 (SYE), synthesized by sol-gel synthesis (composition in mol%). Electron diffraction and HRTEM imaging clearly show the formation of nanocrystallites with an average diameter of ∼8 nm in SAE samples annealed at 1000°C and SYE samples annealed at 1200°C. The volume fraction of the nanocrystalline phase increased with each heat treatment, eventually leading to complete devitrification at 1400°C. Further XRD and NEDX analysis indicates that the nanocrystalline phase has the pyrochlore structure with the formula ErxAl2-xSi 2O7 or ErxY2-xSi2O 7 and a surrounding silica matrix.",

keywords = "Erbium, HRTEM, Nanocrystal, Nanopowder, Photoluminescence, Silicate, Waveguide",

author = "Nan Yao and Kirk Hou and Haines, {Christopher D.} and Nathan Etessami and Varadh Ranganathan and Halpern, {Susan B.} and Kear, {Bernard H.} and Klein, {Lisa C.} and Sigel, {George H.}",

note = "Funding Information: This work is partially supported by the Commission on Science and Technology, New Jersey.",

year = "2005",

month = jun,

doi = "10.1093/jmicro/dfi040",

language = "English (US)",

volume = "54",

pages = "309--315",

journal = "Journal of Electron Microscopy",

issn = "0022-0744",

publisher = "Oxford University Press",

number = "3",

}

TY - JOUR

T1 - Nanostructure of Er3+ doped silicates

AU - Yao, Nan

AU - Hou, Kirk

AU - Haines, Christopher D.

AU - Etessami, Nathan

AU - Ranganathan, Varadh

AU - Halpern, Susan B.

AU - Kear, Bernard H.

AU - Klein, Lisa C.

AU - Sigel, George H.

N1 - Funding Information: This work is partially supported by the Commission on Science and Technology, New Jersey.

PY - 2005/6

Y1 - 2005/6

N2 - We demonstrate nanostructural evolution resulting in highly increased photoluminescence in silicates doped with Er3+ ions. High-resolution transmission electron microscopy (HRTEM) imaging, nano-energy dispersed X-ray (NEDX) spectroscopy, X-ray diffraction (XRD) and photoluminescence analysis confirm the local composition and structure changes of the Er3+ ions upon thermal annealing. We studied two types of amorphous nanopowder: the first is of the composition SiO2/18Al2O3/2Er 2O3 (SAE), synthesized by combustion flame-chemical vapor condensation, and the second is with a composition of SiO2/8Y 2O3/2Er2O3 (SYE), synthesized by sol-gel synthesis (composition in mol%). Electron diffraction and HRTEM imaging clearly show the formation of nanocrystallites with an average diameter of ∼8 nm in SAE samples annealed at 1000°C and SYE samples annealed at 1200°C. The volume fraction of the nanocrystalline phase increased with each heat treatment, eventually leading to complete devitrification at 1400°C. Further XRD and NEDX analysis indicates that the nanocrystalline phase has the pyrochlore structure with the formula ErxAl2-xSi 2O7 or ErxY2-xSi2O 7 and a surrounding silica matrix.

AB - We demonstrate nanostructural evolution resulting in highly increased photoluminescence in silicates doped with Er3+ ions. High-resolution transmission electron microscopy (HRTEM) imaging, nano-energy dispersed X-ray (NEDX) spectroscopy, X-ray diffraction (XRD) and photoluminescence analysis confirm the local composition and structure changes of the Er3+ ions upon thermal annealing. We studied two types of amorphous nanopowder: the first is of the composition SiO2/18Al2O3/2Er 2O3 (SAE), synthesized by combustion flame-chemical vapor condensation, and the second is with a composition of SiO2/8Y 2O3/2Er2O3 (SYE), synthesized by sol-gel synthesis (composition in mol%). Electron diffraction and HRTEM imaging clearly show the formation of nanocrystallites with an average diameter of ∼8 nm in SAE samples annealed at 1000°C and SYE samples annealed at 1200°C. The volume fraction of the nanocrystalline phase increased with each heat treatment, eventually leading to complete devitrification at 1400°C. Further XRD and NEDX analysis indicates that the nanocrystalline phase has the pyrochlore structure with the formula ErxAl2-xSi 2O7 or ErxY2-xSi2O 7 and a surrounding silica matrix.

KW - Erbium

KW - HRTEM

KW - Nanocrystal

KW - Nanopowder

KW - Photoluminescence

KW - Silicate

KW - Waveguide

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