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Light emission enhancement from ZnO nanostructured films grown on Gr/SiC substrates
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- Khranovskyy, Volodymyr (author)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Shtepliuk, Ivan (author)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Ivanov, Ivan Gueorguiev (author)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- (creator_code:org_t)
- Pergamon Press, 2016
- 2016
- English.
- In: Carbon. - : Pergamon Press. - 0008-6223 .- 1873-3891. ; 99, s. 295-301
- Journal article (peer-reviewed)
Abstract
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- We report on the application of a single layer graphene substrates for the growth of polycrystalline ZnO films with advanced light emission properties. Unusually high ultraviolet (UV) and visible (VIS) photoluminesce was observed from the ZnO/Gr/SiC structures in comparison to identical samples without graphene. The photoluminescence intensity depends non-monotonically on the films thickness, reaching its maximum for 150 nm thick films. The phenomena observed is explained as due to the dual graphene role: i) the dangling bond free substrate, providing growth of relaxed thin ZnO layers ii) a back reflector active mirror of the Fabry-Perot cavity that is formed. The reported results demonstrate the potential of two-dimensional carbon materials integration with light emitting wide band gap semiconductors and can be of practical importance for the design of future optoelectronic devices.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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