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Long lifetime of fr...
Long lifetime of free excitons in ZnO tetrapod structures
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- Lee, Sun-Kyun (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Chen, Shula L (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Hongxing, D (author)
- Fudan University
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- Sun, L (author)
- Fudan University
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- Chen, Z (author)
- Fudan University
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- Chen, Weimin (author)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Buyanova, Irina A (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. ; 96:8, s. 083104-
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Abstract
Subject headings
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- Time-resolved photoluminescence (PL) is employed to characterize optical quality of ZnO tetrapods. PL decay of free excitons (FE) is concluded to contain two components with time constants of 1 and 14 ns at room temperature. The fast PL decay is attributed to nonradiative recombination whereas the slow decay is suggested to mainly represent FE radiative lifetime, based on correlation between thermally induced increases in the PL linewidth and FE lifetimes. The results underline superior optical quality of the tetrapods as the decay time of the slow PL component is comparable to the longest lifetimes reported to date for ZnO.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- excitons
- II-VI semiconductors
- photoluminescence
- radiative lifetimes
- time resolved spectra
- 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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