Journal
NATURE COMMUNICATIONS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms9589
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Funding
- National Key Basic Research Program of China [2014CB921101, 2011CB301900, 2013CBA01604]
- National Natural Science Foundation of China [61378025, 61450110087, 61427812, 61274102, 61325020, 61261160499, 61504056]
- Natural Science Foundation of Jiangsu Province [BK20140054]
- China Postdoctoral Science Foundation [2014M551558]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1402028B]
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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 similar to 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 AW(-1) and a fast response time of similar to 100 mu s. 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.
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