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Planar carbon nanotube-graphene hybrid films for high-performance broadband photodetectors.

ABSTRACT: Graphene has emerged as a promising material for photonic applications fuelled by its superior electronic and optical properties. However, the photoresponsivity is limited by the low absorption cross-section and ultrafast recombination rates of photoexcited carriers. Here we demonstrate a photoconductive gain of ∼10(5) electrons per photon in a carbon nanotube-graphene hybrid due to efficient photocarriers generation and transport within the nanostructure. A broadband photodetector (covering 400-1,550 nm) based on such hybrid films is fabricated with a high photoresponsivity of >100 A W(-1) and a fast response time of ∼100 μs. The combination of ultra-broad bandwidth, high responsivities and fast operating speeds affords new opportunities for facile and scalable fabrication of all-carbon optoelectronic devices.

SUBMITTER: Liu Y

PROVIDER: S-EPMC4633958 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature

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Planar carbon nanotube-graphene hybrid films for high-performance broadband photodetectors.

Liu Yuanda Y Wang Fengqiu F Wang Xiaomu X Wang Xizhang X Flahaut Emmanuel E Liu Xiaolong X Li Yao Y Wang Xinran X Xu Yongbing Y Shi Yi Y Zhang Rong R

Nature communications 20151008

Graphene has emerged as a promising material for photonic applications fuelled by its superior electronic and optical properties. However, the photoresponsivity is limited by the low absorption cross-section and ultrafast recombination rates of photoexcited carriers. Here we demonstrate a photoconductive gain of ∼10(5) electrons per photon in a carbon nanotube-graphene hybrid due to efficient photocarriers generation and transport within the nanostructure. A broadband photodetector (covering 400 ...[more]

PMID: 26446884

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