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On the origin of su...
On the origin of suppression of free exciton no-phonon emission in ZnO tetrapods
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- Chen, Shula (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Kyun Lee, Sun (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Chen, Weimin (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Dong, H X (author)
- Fudan University
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- Sun, L (author)
- Fudan University
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- Chen, Z H (author)
- Fudan University
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- Buyanova, Irina (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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(creator_code:org_t)
- AIP Publishing, 2010
- 2010
- English.
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In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 96:3, s. 033108-
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Abstract
Subject headings
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- Temperature dependent photoluminescence and cathodoluminescence (CL) spectroscopies are employed to investigate free exciton (FX) emissions in ZnO tetrapods. The intensity of the no-phonon line is found to be largely suppressed as compared with longitudinal optical phonon assisted transitions, in sharp contrast to bulk ZnO. From spatially resolved CL studies, this suppression is shown to strongly depend on structural morphology of the ZnO tetrapods and becomes most significant within areas with faceted surfaces. A model based on reabsorption due to multiple internal reflections in the vicinity of the FX resonance is suggested to account for the observed effect.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- cathodoluminescence
- II-VI semiconductors
- nanostructured materials
- phonon-exciton interactions
- photoluminescence
- wide band gap semiconductors
- zinc compounds
- TECHNOLOGY
- TEKNIKVETENSKAP
- Semiconductor physics
- Halvledarfysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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