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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Liliental-Weber, Z.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2013Local structure of amorphous GaN1-xAsx semiconductor alloys across the composition rangecitations
- 2013Microstructure of Mg doped GaNAs alloyscitations
- 2012Wurtzite-to amorphous-to cubic phase transition of GaN1-x Asx alloys with increasing As contentcitations
- 2012Structural studies of GaN 1-x As x and GaN 1-x Bi x alloys for solar cell applicationscitations
- 2011Structural defects and cathodoluminescence of InxGa1-xN layerscitations
- 2011GaNAs alloys over the whole composition range grown on crystalline and amorphous substratescitations
- 2010Non-equilibrium GaNAs alloys with band gap ranging from 0.8-3.4 eVcitations
- 2010Molecular beam epitaxy of GaNAs alloys with high As content for potential photoanode applications in hydrogen productioncitations
- 2010Amorphous GaN1-xAsx alloys for multi-junction solar cells
- 2010Low gap amorphous GaN1-x Asx alloys grown on glass substratecitations
- 2009Structural perfection of InGaN layers and its relation to photoluminescencecitations
- 2009Highly mismatched crystalline and amorphous GaN1-x As x alloys in the whole composition rangecitations
- 2009Electrical and electrothermal transport in InNcitations
- 2009Spontaneous stratification of InGaN layers and its influence on optical propertiescitations
- 2008Energetic Beam Synthesis of Dilute Nitrides and Related Alloyscitations
- 2008Low-temperature grown compositionally graded InGaN filmscitations
- 2006Structure and electronic properties of InN and In-rich group III-nitride alloyscitations
- 2005Structural TEM study of nonpolar a-plane gallium nitride grown on (1120) 4H-SiC by organometallic vapor phase epitaxycitations
- 2005Transmission electron microscopy study of nonpolar a-plane GaN grown by pendeo-epitaxy on (11(2)under-bar0) 4H-SiC
- 2004Characterization and manipulation of exposed Ge nanocrystals
- 2003Diluted magnetic semiconductors formed by ion implantation and pulsed-laser meltingcitations
- 2003Growth and characterization of epitaxial GaN thin films on 4H-SiC (11.0) substrates
- 2003Synthesis of GaNxAs1-x thin films by pulsed laser melting and rapid thermal annealing of N+-implanted GaAscitations
- 2003Microstructure of nonpolar a-plane GaN grown on (1120) 4H-SiC investigated by TEM.
- 2002Transparent ZnO-based ohmic contact to p-GaNcitations
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article
Structural perfection of InGaN layers and its relation to photoluminescence
Abstract
The relation between structural perfection and optical properties of InGaN with 10% In are discussed. Transmission Electron Microscopy, X-ray diffraction and Rutherford backscattering spectrometry measurements show that only strained layers with a thickness not exceeding 100 nm are defect free and In concentration is lower than the nominal value. Extension of layer thickness leads to layer sequestration into sublayers with different In contents and the formation of planar defects as a result of layer relaxation. In concentration in such sublayers reach and in some cases exceed the nominal concentration. A single band edge photoluminescence peak is observed only for the thinnest layer. Samples with larger film thickness showed multiple PL peaks corresponding to layers with different In content. Much higher In content would be required to explain the presence of some PL peaks, suggesting that some PL peaks originate from the defective areas of the film. This was confirmed by cathodoluminescence studies performed on the same samples used earlier for TEM studies. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.