Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures
The three-dimensional atom probe has been used to characterize green- and blue-emitting Inx Ga1-x NGaN multiple quantum well structures with subnanometer resolution over a 100 nm field of view. The distribution of indium in Inx Ga1-x N samples with different compositions is analyzed. No evidence is...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
American Institute of Physics
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/35984 |
| _version_ | 1848754644023508992 |
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| author | Galtrey, M. Oliver, R. Kappers, M. Humphreys, C. Clifton, P. Larson, D. Saxey, David Cerezo, A. |
| author_facet | Galtrey, M. Oliver, R. Kappers, M. Humphreys, C. Clifton, P. Larson, D. Saxey, David Cerezo, A. |
| author_sort | Galtrey, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The three-dimensional atom probe has been used to characterize green- and blue-emitting Inx Ga1-x NGaN multiple quantum well structures with subnanometer resolution over a 100 nm field of view. The distribution of indium in Inx Ga1-x N samples with different compositions is analyzed. No evidence is found wherein the indium distribution deviates from that of a random alloy, which appears to preclude indium clustering as the cause of the reported carrier localization in these structures. The upper interface of each quantum well layer is shown to be rougher and more diffuse than the lower interface, and the existence of monolayer steps in the upper interfaces is revealed. These steps could effectively localize carriers at room temperature. Indium is shown to be present in the GaN barrier layers despite the absence of indium precursor flux during barrier layer growth. A strong evidence is produced to support a mechanism for the presence of indium in these layers, namely, that a layer of indium forms on the surface of the growing Inx Ga1-x N quantum well, and this layer then acts as a source of indium during GaN barrier layer growth. © 2008 American Institute of Physics. |
| first_indexed | 2025-11-14T08:43:41Z |
| format | Journal Article |
| id | curtin-20.500.11937-35984 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:43:41Z |
| publishDate | 2008 |
| publisher | American Institute of Physics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-359842017-09-13T15:17:10Z Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures Galtrey, M. Oliver, R. Kappers, M. Humphreys, C. Clifton, P. Larson, D. Saxey, David Cerezo, A. The three-dimensional atom probe has been used to characterize green- and blue-emitting Inx Ga1-x NGaN multiple quantum well structures with subnanometer resolution over a 100 nm field of view. The distribution of indium in Inx Ga1-x N samples with different compositions is analyzed. No evidence is found wherein the indium distribution deviates from that of a random alloy, which appears to preclude indium clustering as the cause of the reported carrier localization in these structures. The upper interface of each quantum well layer is shown to be rougher and more diffuse than the lower interface, and the existence of monolayer steps in the upper interfaces is revealed. These steps could effectively localize carriers at room temperature. Indium is shown to be present in the GaN barrier layers despite the absence of indium precursor flux during barrier layer growth. A strong evidence is produced to support a mechanism for the presence of indium in these layers, namely, that a layer of indium forms on the surface of the growing Inx Ga1-x N quantum well, and this layer then acts as a source of indium during GaN barrier layer growth. © 2008 American Institute of Physics. 2008 Journal Article http://hdl.handle.net/20.500.11937/35984 10.1063/1.2938081 American Institute of Physics restricted |
| spellingShingle | Galtrey, M. Oliver, R. Kappers, M. Humphreys, C. Clifton, P. Larson, D. Saxey, David Cerezo, A. Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title | Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title_full | Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title_fullStr | Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title_full_unstemmed | Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title_short | Three-dimensional atom probe analysis of green- and blue-emitting In x Ga1-x NGaN multiple quantum well structures |
| title_sort | three-dimensional atom probe analysis of green- and blue-emitting in x ga1-x ngan multiple quantum well structures |
| url | http://hdl.handle.net/20.500.11937/35984 |