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Impacts of carrier ...
Impacts of carrier capture processes in the thermal quenching of photoluminescence in Al-N co-doped SiC
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- Tarekegne, Abebe T. (författare)
- Tech Univ Denmark, Denmark
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- Norrman, K. (författare)
- Tech Univ Denmark, Denmark
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- Jokubavicius, Valdas (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Syväjärvi, Mikael (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Schuh, P. (författare)
- FAU Erlangen Nuremberg, Germany
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- Wellmann, P. (författare)
- FAU Erlangen Nuremberg, Germany
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- Ou, H. (författare)
- Tech Univ Denmark, Denmark
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(creator_code:org_t)
- 2019-08-23
- 2019
- Engelska.
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Ingår i: Applied physics. B, Lasers and optics (Print). - : SPRINGER HEIDELBERG. - 0946-2171 .- 1432-0649. ; 125:9
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- High concentrations of aluminum (Al) and nitrogen (N) dopants of 6H SiC have been achieved by a fast sublimation growth process. The Al-N co-doped 6H-SiC layer exhibits a strong light-blue photoluminescence emission at low temperatures due to emissions from D-I centers and donor acceptor pairs (DAP). The photoluminescence quenching mechanisms of those emissions are different. The decrease of free carrier capture cross-section as temperature increases according to the cascade capture process causes quenching of the photoluminescence emission form D-I centers. Emission from Al-N DAP centers exhibits an exponential quenching with activation energy of (95 +/- 10) meV. This is attributed to a competing hole capture by non-radiative defect in a multiphonon emission process.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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