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White Light Emissio...
White Light Emission from Fluorescent SiC with Porous Surface
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- Lu, Weifang (författare)
- Technical University of Denmark, Denmark
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- Ou, Yiyu (författare)
- Technical University of Denmark, Denmark
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- Maria Fiordaliso, Elisabetta (författare)
- Technical University of Denmark, Denmark
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- Iwasa, Yoshimi (författare)
- Meijo University, Japan
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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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- Kamiyama, Satoshi (författare)
- Meijo University, Japan
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- Michael Petersen, Paul (författare)
- Technical University of Denmark, Denmark
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- Ou, Haiyan (författare)
- Technical University of Denmark, Denmark
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(creator_code:org_t)
- 2017-08-29
- 2017
- Engelska.
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Ingår i: Scientific Reports. - : NATURE PUBLISHING GROUP. - 2045-2322. ; 7
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://www.nature.c...
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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
- We report for the first time a NUV light to white light conversion in a N-B co-doped 6H-SiC (fluorescent SiC) layer containing a hybrid structure. The surface of fluorescent SiC sample contains porous structures fabricated by anodic oxidation method. After passivation by 20 nm thick Al2O3, the photoluminescence intensity from the porous layer was significant enhanced by a factor of more than 12. Using a porous layer of moderate thickness (similar to 10 mu m), high-quality white light emission was realized by combining the independent emissions of blue-green emission from the porous layer and yellow emission from the bulk fluorescent SiC layer. A high color rendering index of 81.1 has been achieved. Photoluminescence spectra in porous layers fabricated in both commercial n-type and lab grown N-B co-doped 6H-SiC show two emission peaks centered approximately at 460 nm and 530 nm. Such blue-green emission phenomenon can be attributed to neutral oxygen vacancies and interface C-related surface defects generated dring anodic oxidation process. Porous fluorescent SiC can offer a great flexibility in color rendering by changing the thickness of porous layer and bulk fluorescent layer. Such a novel approach opens a new perspective for the development of high performance and rare-earth element free white light emitting materials.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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