Simultaneous TEM and cathodoluminescence imaging of non uniformity in in 0.1Ga 0.9N quantum wells

N.M. Boyall, K. Durose, I.M. Watson

Research output: Contribution to journalArticle

Abstract

Monochromatic cathodoluminescence (CL) imaging of metal-organic vapour phase epitaxy (MOVPE) grown In(0.1)Ga(0.9)N single quantum wells (QW) has been performed in a scanning transmission electron microscope (STEM). Spatially resolved fluctuations in the CL emission wavelength and intensity of the QW luminescence were recorded. The presence of regions with luminescent features asymmetrically distributed either side of the QW peak emission was inferred. These fluctuations may be attributed to, by for example, variations of ±0.01 in the In fraction of the In(0.1)Ga(0.9)N alloy, to changes of up to 0.6nm in the QW thickness. However these factors do not explain the gross fluctuations in QW emission intensity observed in TEM-CL on the scale of approximately one micron.
LanguageEnglish
JournalMRS Online Proceedings Library
Volume743
Publication statusPublished - 2003

Fingerprint

Cathodoluminescence
cathodoluminescence
nonuniformity
Semiconductor quantum wells
quantum wells
Transmission electron microscopy
Imaging techniques
transmission electron microscopy
Vapor phase epitaxy
vapor phase epitaxy
Luminescence
Electron microscopes
electron microscopes
Metals
luminescence
Scanning
Wavelength
scanning
wavelengths
metals

Keywords

  • cathodoluminescence
  • Monochromatic cathodoluminescence
  • metal-organic vapour phase epitaxy
  • quantum wells
  • scanning transmission electron microscope
  • microscopy

Cite this

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title = "Simultaneous TEM and cathodoluminescence imaging of non uniformity in in 0.1Ga 0.9N quantum wells",
abstract = "Monochromatic cathodoluminescence (CL) imaging of metal-organic vapour phase epitaxy (MOVPE) grown In(0.1)Ga(0.9)N single quantum wells (QW) has been performed in a scanning transmission electron microscope (STEM). Spatially resolved fluctuations in the CL emission wavelength and intensity of the QW luminescence were recorded. The presence of regions with luminescent features asymmetrically distributed either side of the QW peak emission was inferred. These fluctuations may be attributed to, by for example, variations of ±0.01 in the In fraction of the In(0.1)Ga(0.9)N alloy, to changes of up to 0.6nm in the QW thickness. However these factors do not explain the gross fluctuations in QW emission intensity observed in TEM-CL on the scale of approximately one micron.",
keywords = "cathodoluminescence, Monochromatic cathodoluminescence, metal-organic vapour phase epitaxy, quantum wells, scanning transmission electron microscope, microscopy",
author = "N.M. Boyall and K. Durose and I.M. Watson",
year = "2003",
language = "English",
volume = "743",
journal = "MRS Online Proceedings Library",
issn = "1946-4274",

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Simultaneous TEM and cathodoluminescence imaging of non uniformity in in 0.1Ga 0.9N quantum wells. / Boyall, N.M.; Durose, K.; Watson, I.M.

In: MRS Online Proceedings Library , Vol. 743, 2003.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Simultaneous TEM and cathodoluminescence imaging of non uniformity in in 0.1Ga 0.9N quantum wells

AU - Boyall, N.M.

AU - Durose, K.

AU - Watson, I.M.

PY - 2003

Y1 - 2003

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AB - Monochromatic cathodoluminescence (CL) imaging of metal-organic vapour phase epitaxy (MOVPE) grown In(0.1)Ga(0.9)N single quantum wells (QW) has been performed in a scanning transmission electron microscope (STEM). Spatially resolved fluctuations in the CL emission wavelength and intensity of the QW luminescence were recorded. The presence of regions with luminescent features asymmetrically distributed either side of the QW peak emission was inferred. These fluctuations may be attributed to, by for example, variations of ±0.01 in the In fraction of the In(0.1)Ga(0.9)N alloy, to changes of up to 0.6nm in the QW thickness. However these factors do not explain the gross fluctuations in QW emission intensity observed in TEM-CL on the scale of approximately one micron.

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KW - Monochromatic cathodoluminescence

KW - metal-organic vapour phase epitaxy

KW - quantum wells

KW - scanning transmission electron microscope

KW - microscopy

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