Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy

D. Cherns; R. F. Webster; S. V. Novikov; C. T. Foxon; A. M. Fischer; F. A. Ponce; S. J. Haigh

doi:10.1088/0957-4484/25/21/215705

Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy

D. Cherns^*, R. F. Webster, S. V. Novikov, C. T. Foxon, A. M. Fischer, F. A. Ponce, S. J. Haigh

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

The composition of InxGa(1-x)N nanorods grown by molecular beam epitaxy with nominal x = 0.5 has been mapped by electron microscopy using Z-contrast imaging and x-ray microanalysis. This shows a coherent and highly strained core-shell structure with a nearatomically sharp boundary between a Ga-rich shell (x similar to 0.3) and an In-rich core (x similar to 0.7), which itself has In-and Ga-rich platelets alternating along the growth axis. It is proposed that the shell and core regions are lateral and vertical growth sectors, with the core structure determined by spinodal decomposition.

Original language	English
Article number	215705
Number of pages	6
Journal	Nanotechnology
Volume	25
Issue number	21
DOIs	https://doi.org/10.1088/0957-4484/25/21/215705
Publication status	Published - 30 May 2014

Keywords

InGaN nanorods
transmission electron microscopy
molecular beam epitaxy
EDX mapping
core-shell structures
spinodal decomposition
INGAN
ALLOYS

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Solar cells based on InGaN nanostructures
Cherns, D. (Principal Investigator)
1/10/11 → 1/10/14
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title = "Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy",

abstract = "The composition of InxGa(1-x)N nanorods grown by molecular beam epitaxy with nominal x = 0.5 has been mapped by electron microscopy using Z-contrast imaging and x-ray microanalysis. This shows a coherent and highly strained core-shell structure with a nearatomically sharp boundary between a Ga-rich shell (x similar to 0.3) and an In-rich core (x similar to 0.7), which itself has In-and Ga-rich platelets alternating along the growth axis. It is proposed that the shell and core regions are lateral and vertical growth sectors, with the core structure determined by spinodal decomposition.",

keywords = "InGaN nanorods, transmission electron microscopy, molecular beam epitaxy, EDX mapping, core-shell structures, spinodal decomposition, INGAN, ALLOYS",

author = "D. Cherns and Webster, \{R. F.\} and Novikov, \{S. V.\} and Foxon, \{C. T.\} and Fischer, \{A. M.\} and Ponce, \{F. A.\} and Haigh, \{S. J.\}",

year = "2014",

month = may,

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doi = "10.1088/0957-4484/25/21/215705",

language = "English",

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T1 - Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy

AU - Cherns, D.

AU - Webster, R. F.

AU - Novikov, S. V.

AU - Foxon, C. T.

AU - Fischer, A. M.

AU - Ponce, F. A.

AU - Haigh, S. J.

PY - 2014/5/30

Y1 - 2014/5/30

N2 - The composition of InxGa(1-x)N nanorods grown by molecular beam epitaxy with nominal x = 0.5 has been mapped by electron microscopy using Z-contrast imaging and x-ray microanalysis. This shows a coherent and highly strained core-shell structure with a nearatomically sharp boundary between a Ga-rich shell (x similar to 0.3) and an In-rich core (x similar to 0.7), which itself has In-and Ga-rich platelets alternating along the growth axis. It is proposed that the shell and core regions are lateral and vertical growth sectors, with the core structure determined by spinodal decomposition.

AB - The composition of InxGa(1-x)N nanorods grown by molecular beam epitaxy with nominal x = 0.5 has been mapped by electron microscopy using Z-contrast imaging and x-ray microanalysis. This shows a coherent and highly strained core-shell structure with a nearatomically sharp boundary between a Ga-rich shell (x similar to 0.3) and an In-rich core (x similar to 0.7), which itself has In-and Ga-rich platelets alternating along the growth axis. It is proposed that the shell and core regions are lateral and vertical growth sectors, with the core structure determined by spinodal decomposition.

KW - InGaN nanorods

KW - transmission electron microscopy

KW - molecular beam epitaxy

KW - EDX mapping

KW - core-shell structures

KW - spinodal decomposition

KW - INGAN

KW - ALLOYS

U2 - 10.1088/0957-4484/25/21/215705

DO - 10.1088/0957-4484/25/21/215705

M3 - Article (Academic Journal)

C2 - 24785272

SN - 0957-4484

VL - 25

JO - Nanotechnology

JF - Nanotechnology

IS - 21

M1 - 215705

ER -

Compositional variations in In0.5Ga0.5N nanorods grown by molecular beam epitaxy

Abstract

Keywords

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Solar cells based on InGaN nanostructures

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