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説明:

Finding new optoelectronic mechanisms that overcome the limitations of conventional semiconductor devices is paramount for detecting and harvesting low-energy photons. A highly promising approach is to drive a current from the thermal energy added to the free-electron bath as a result of light absorption. Successful implementation of this strategy requires a broadband absorber where carriers interact among themselves more strongly than with phonons, as well as energy-selective contacts to extract the excess electronic heat. Here we show that graphene-WSe2-graphene heterostructure devices offer this possibility through the photo-thermionic effect: the absorbed photon energy in graphene is efficiently transferred to the electron bath, leading to a thermalized 'hot' carrier distribution.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Optoelectronic mechanisms, graphene, photo-thermionic effect

刊行年月日: 2016-07-14

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 7 12174

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/ncomms12174

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更新時刻: 2025-02-27 12:30:35 +0900

MDRでの公開時刻: 2025-02-27 12:30:35 +0900