Luminescence and structural studies of iron implanted α-Al2O3

T. Monteiro; C. Boemare; M. J. Soares; E. Alves; C. Marques; C. McHargue; L. C. Ononye; L. F. Allard

doi:10.1016/S0168-583X(02)00625-0

Luminescence and structural studies of iron implanted α-Al₂O₃

T. Monteiro, C. Boemare, M. J. Soares, E. Alves, C. Marques, C. McHargue, L. C. Ononye, L. F. Allard

Nuclear Energy Materials Microanalysis

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

26 Scopus citations

Abstract

Transition metal ions (TM) are typically contaminants of growth processes in wide band gap materials. In Al₂O₃ (E_g ∼ 9 eV) Cr, Fe and Ti are responsible for red, yellow and blue colored sapphire. While the R-lines from Cr³⁺ have been extensively studied by photoluminescence (PL) the optical characterization of other transition metal ions is less known. In this work we studied by PL, transmission electron microscopy (TEM) and RBS/channeling measurements a series of iron implanted α-Al₂O₃ samples. In the red region a sharp emission line at 1.833 eV with a lifetime of ∼1 ms is identified at low temperature. For temperatures above 35 K and on the high energy side a new thermally populated emission line occurs at 1.843 eV. Structural analysis performed by RBS/channeling, TEM and X-ray measurements indicates that metallic iron precipitates as well as iron oxide complexes are present in the samples. Combining the temperature dependence of luminescence and decay times with the results obtained from structural analysis a model for the optical center is discussed.

Original language	English
Pages (from-to)	638-643
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	191
Issue number	1-4
DOIs	https://doi.org/10.1016/S0168-583X(02)00625-0
State	Published - May 2002

Funding

We acknowledge our colleague Luis Redondo for the Fe implantations and FCT for its support through the PRAXIS XXI under the contract C/CTM/12067/1998.

Funders	Funder number
Fundação para a Ciência e a Tecnologia	C/CTM/12067/1998

Keywords

Ion implantation
Luminescence
RBS

Access to Document

10.1016/S0168-583X(02)00625-0

Cite this

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title = "Luminescence and structural studies of iron implanted α-Al2O3",

abstract = "Transition metal ions (TM) are typically contaminants of growth processes in wide band gap materials. In Al2O3 (Eg ∼ 9 eV) Cr, Fe and Ti are responsible for red, yellow and blue colored sapphire. While the R-lines from Cr3+ have been extensively studied by photoluminescence (PL) the optical characterization of other transition metal ions is less known. In this work we studied by PL, transmission electron microscopy (TEM) and RBS/channeling measurements a series of iron implanted α-Al2O3 samples. In the red region a sharp emission line at 1.833 eV with a lifetime of ∼1 ms is identified at low temperature. For temperatures above 35 K and on the high energy side a new thermally populated emission line occurs at 1.843 eV. Structural analysis performed by RBS/channeling, TEM and X-ray measurements indicates that metallic iron precipitates as well as iron oxide complexes are present in the samples. Combining the temperature dependence of luminescence and decay times with the results obtained from structural analysis a model for the optical center is discussed.",

keywords = "Ion implantation, Luminescence, RBS",

author = "T. Monteiro and C. Boemare and Soares, {M. J.} and E. Alves and C. Marques and C. McHargue and Ononye, {L. C.} and Allard, {L. F.}",

year = "2002",

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doi = "10.1016/S0168-583X(02)00625-0",

language = "English",

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TY - JOUR

T1 - Luminescence and structural studies of iron implanted α-Al2O3

AU - Monteiro, T.

AU - Boemare, C.

AU - Soares, M. J.

AU - Alves, E.

AU - Marques, C.

AU - McHargue, C.

AU - Ononye, L. C.

AU - Allard, L. F.

PY - 2002/5

Y1 - 2002/5

N2 - Transition metal ions (TM) are typically contaminants of growth processes in wide band gap materials. In Al2O3 (Eg ∼ 9 eV) Cr, Fe and Ti are responsible for red, yellow and blue colored sapphire. While the R-lines from Cr3+ have been extensively studied by photoluminescence (PL) the optical characterization of other transition metal ions is less known. In this work we studied by PL, transmission electron microscopy (TEM) and RBS/channeling measurements a series of iron implanted α-Al2O3 samples. In the red region a sharp emission line at 1.833 eV with a lifetime of ∼1 ms is identified at low temperature. For temperatures above 35 K and on the high energy side a new thermally populated emission line occurs at 1.843 eV. Structural analysis performed by RBS/channeling, TEM and X-ray measurements indicates that metallic iron precipitates as well as iron oxide complexes are present in the samples. Combining the temperature dependence of luminescence and decay times with the results obtained from structural analysis a model for the optical center is discussed.

AB - Transition metal ions (TM) are typically contaminants of growth processes in wide band gap materials. In Al2O3 (Eg ∼ 9 eV) Cr, Fe and Ti are responsible for red, yellow and blue colored sapphire. While the R-lines from Cr3+ have been extensively studied by photoluminescence (PL) the optical characterization of other transition metal ions is less known. In this work we studied by PL, transmission electron microscopy (TEM) and RBS/channeling measurements a series of iron implanted α-Al2O3 samples. In the red region a sharp emission line at 1.833 eV with a lifetime of ∼1 ms is identified at low temperature. For temperatures above 35 K and on the high energy side a new thermally populated emission line occurs at 1.843 eV. Structural analysis performed by RBS/channeling, TEM and X-ray measurements indicates that metallic iron precipitates as well as iron oxide complexes are present in the samples. Combining the temperature dependence of luminescence and decay times with the results obtained from structural analysis a model for the optical center is discussed.

KW - Ion implantation

KW - Luminescence

KW - RBS

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