Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface
Abstract We investigate the optical signature of the interface in a single MgZnO/ZnO heterojunction, which exhibits two orders of magnitude lower resistivity and 10 times higher electron mobility compared with the MgZnO/Al2O3 film grown under the same conditions. These impressive transport propertie...
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Nature Portfolio
2017
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oai:doaj.org-article:cc1a67bbc1e2482489daa6b9d089a6482021-12-02T16:07:45ZRadiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface10.1038/s41598-017-07568-z2045-2322https://doaj.org/article/cc1a67bbc1e2482489daa6b9d089a6482017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07568-zhttps://doaj.org/toc/2045-2322Abstract We investigate the optical signature of the interface in a single MgZnO/ZnO heterojunction, which exhibits two orders of magnitude lower resistivity and 10 times higher electron mobility compared with the MgZnO/Al2O3 film grown under the same conditions. These impressive transport properties are attributed to increased mobility of electrons at the MgZnO/ZnO heterojunction interface. Depth-resolved cathodoluminescence and photoluminescence studies reveal a 3.2 eV H-band optical emission from the heterointerface, which exhibits excitonic properties and a localization energy of 19.6 meV. The emission is attributed to band-bending due to the polarization discontinuity at the interface, which leads to formation of a triangular quantum well and localized excitons by electrostatic coupling.Sumin ChoiDavid J. RogersEric V. SandanaPhilippe BoveFerechteh H. TeheraniChristian NenstielAxel HoffmannRyan McClintockManijeh RazeghiDavid LookAngus GentleMatthew R. PhillipsCuong Ton-ThatNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Medicine R Science Q |
| spellingShingle |
Medicine R Science Q Sumin Choi David J. Rogers Eric V. Sandana Philippe Bove Ferechteh H. Teherani Christian Nenstiel Axel Hoffmann Ryan McClintock Manijeh Razeghi David Look Angus Gentle Matthew R. Phillips Cuong Ton-That Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| description |
Abstract We investigate the optical signature of the interface in a single MgZnO/ZnO heterojunction, which exhibits two orders of magnitude lower resistivity and 10 times higher electron mobility compared with the MgZnO/Al2O3 film grown under the same conditions. These impressive transport properties are attributed to increased mobility of electrons at the MgZnO/ZnO heterojunction interface. Depth-resolved cathodoluminescence and photoluminescence studies reveal a 3.2 eV H-band optical emission from the heterointerface, which exhibits excitonic properties and a localization energy of 19.6 meV. The emission is attributed to band-bending due to the polarization discontinuity at the interface, which leads to formation of a triangular quantum well and localized excitons by electrostatic coupling. |
| format |
article |
| author |
Sumin Choi David J. Rogers Eric V. Sandana Philippe Bove Ferechteh H. Teherani Christian Nenstiel Axel Hoffmann Ryan McClintock Manijeh Razeghi David Look Angus Gentle Matthew R. Phillips Cuong Ton-That |
| author_facet |
Sumin Choi David J. Rogers Eric V. Sandana Philippe Bove Ferechteh H. Teherani Christian Nenstiel Axel Hoffmann Ryan McClintock Manijeh Razeghi David Look Angus Gentle Matthew R. Phillips Cuong Ton-That |
| author_sort |
Sumin Choi |
| title |
Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| title_short |
Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| title_full |
Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| title_fullStr |
Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| title_full_unstemmed |
Radiative recombination of confined electrons at the MgZnO/ZnO heterojunction interface |
| title_sort |
radiative recombination of confined electrons at the mgzno/zno heterojunction interface |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/cc1a67bbc1e2482489daa6b9d089a648 |
| work_keys_str_mv |
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| _version_ |
1718384745451094016 |