Статья

Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films

L. BritnellSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKR. M. RibeiroDepartamento de Física and Centro de Física, Universidade do Minho, P-4710-057, Braga, PortugalA. EckmannSchool of Chemistry and Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UKR. JalilManchester Centre for Mesoscience and Nanotechnology, University of Manchester, Oxford Road, Manchester, M13 9PL, UKBranson D. BelleManchester Centre for Mesoscience and Nanotechnology, University of Manchester, Oxford Road, Manchester, M13 9PL, UKArtem MishchenkoSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKYoonkang KimDepartment of Chemistry, College of Natural Sciences, Seoul National University, Seoul, 151-747, KoreaRoman GorbachevSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKThanasis GeorgiouSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKС. В. МорозовInstitute for Microelectronics Technology, 142432 Chernogolovka, RussiaA. N. GrigorenkoSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UKA. K. GeǐmManchester Centre for Mesoscience and Nanotechnology, University of Manchester, Oxford Road, Manchester, M13 9PL, UKCinzia CasiraghiDepartment of Physics, Freie University, Berlin, 14195, GermanyA. H. Castro NetoGraphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546Kostya S. NovoselovSchool of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UK

2013en

ABI

Аннотация

The isolation of various two-dimensional (2D) materials, and the possibility to combine them in vertical stacks, has created a new paradigm in materials science: heterostructures based on 2D crystals. Such a concept has already proven fruitful for a number of electronic applications in the area of ultrathin and flexible devices. Here, we expand the range of such structures to photoactive ones by using semiconducting transition metal dichalcogenides (TMDCs)/graphene stacks. Van Hove singularities in the electronic density of states of TMDC guarantees enhanced light-matter interactions, leading to enhanced photon absorption and electron-hole creation (which are collected in transparent graphene electrodes). This allows development of extremely efficient flexible photovoltaic devices with photoresponsivity above 0.1 ampere per watt (corresponding to an external quantum efficiency of above 30%).

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Идентификаторы

DOI: 10.1126/science.1235547

Цитирования и источники

Цитирований: 2Использованных источников: 0

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