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Optical and electrical properties of undoped and doped Ge nanocrystals

Size-dependent photoluminescence characteristics from Ge nanocrystals embedded in different oxide matrices have been studied to demonstrate the light emission in the visible wavelength from quantum-confined charge carriers. On the other hand, the energy transfer mechanism between Er ions and Ge nano...

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Autores principales: Das, Samaresh, Aluguri, Rakesh, Manna, Santanu, Singha, Rajkumar, Dhar, Achintya, Pavesi, Lorenzo, Ray, Samit Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3305539/
https://www.ncbi.nlm.nih.gov/pubmed/22348653
http://dx.doi.org/10.1186/1556-276X-7-143
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author Das, Samaresh
Aluguri, Rakesh
Manna, Santanu
Singha, Rajkumar
Dhar, Achintya
Pavesi, Lorenzo
Ray, Samit Kumar
author_facet Das, Samaresh
Aluguri, Rakesh
Manna, Santanu
Singha, Rajkumar
Dhar, Achintya
Pavesi, Lorenzo
Ray, Samit Kumar
author_sort Das, Samaresh
collection PubMed
description Size-dependent photoluminescence characteristics from Ge nanocrystals embedded in different oxide matrices have been studied to demonstrate the light emission in the visible wavelength from quantum-confined charge carriers. On the other hand, the energy transfer mechanism between Er ions and Ge nanocrystals has been exploited to exhibit the emission in the optical fiber communication wavelength range. A broad visible electroluminescence, attributed to electron hole recombination of injected carriers in Ge nanocrystals, has been achieved. Nonvolatile flash-memory devices using Ge nanocrystal floating gates with different tunneling oxides including SiO(2), Al(2)O(3), HfO(2), and variable oxide thickness [VARIOT] tunnel barrier have been fabricated. An improved charge storage characteristic with enhanced retention time has been achieved for the devices using VARIOT oxide floating gate.
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spelling pubmed-33055392012-03-16 Optical and electrical properties of undoped and doped Ge nanocrystals Das, Samaresh Aluguri, Rakesh Manna, Santanu Singha, Rajkumar Dhar, Achintya Pavesi, Lorenzo Ray, Samit Kumar Nanoscale Res Lett Nano Express Size-dependent photoluminescence characteristics from Ge nanocrystals embedded in different oxide matrices have been studied to demonstrate the light emission in the visible wavelength from quantum-confined charge carriers. On the other hand, the energy transfer mechanism between Er ions and Ge nanocrystals has been exploited to exhibit the emission in the optical fiber communication wavelength range. A broad visible electroluminescence, attributed to electron hole recombination of injected carriers in Ge nanocrystals, has been achieved. Nonvolatile flash-memory devices using Ge nanocrystal floating gates with different tunneling oxides including SiO(2), Al(2)O(3), HfO(2), and variable oxide thickness [VARIOT] tunnel barrier have been fabricated. An improved charge storage characteristic with enhanced retention time has been achieved for the devices using VARIOT oxide floating gate. Springer 2012-02-20 /pmc/articles/PMC3305539/ /pubmed/22348653 http://dx.doi.org/10.1186/1556-276X-7-143 Text en Copyright ©2012 Das et al; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Nano Express
Das, Samaresh
Aluguri, Rakesh
Manna, Santanu
Singha, Rajkumar
Dhar, Achintya
Pavesi, Lorenzo
Ray, Samit Kumar
Optical and electrical properties of undoped and doped Ge nanocrystals
title Optical and electrical properties of undoped and doped Ge nanocrystals
title_full Optical and electrical properties of undoped and doped Ge nanocrystals
title_fullStr Optical and electrical properties of undoped and doped Ge nanocrystals
title_full_unstemmed Optical and electrical properties of undoped and doped Ge nanocrystals
title_short Optical and electrical properties of undoped and doped Ge nanocrystals
title_sort optical and electrical properties of undoped and doped ge nanocrystals
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3305539/
https://www.ncbi.nlm.nih.gov/pubmed/22348653
http://dx.doi.org/10.1186/1556-276X-7-143
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