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Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films.

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Title: Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films.
Authors: Britnell, L., Ribeiro, R. M., Eckmann, A., Jalil, R., Belle, B. D., Mishchenko, A., Kim, Y.-J., Gorbachev, R. V., Georgiou, T., Morozov, S. V., Grigorenko, A. N., Geim, A. K., Casiraghi, C., Neto, A. H. Castro, Novoselov, K. S.
Source: Science (pre-March 2025). 6/14/2013, Vol. 340 Issue 6138, p1311-1314. 4p.
Subjects: Materials science, Heterostructures, Thin film crystallography, Chalcogenide films, Graphene, Electronic density of states, Photovoltaic power systems
Abstract: 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%). [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Strong Light-Matter Interactions in Heterostructures of Atomically Thin Films.
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  Data: <searchLink fieldCode="AR" term="%22Britnell%2C+L%2E%22">Britnell, L.</searchLink><br /><searchLink fieldCode="AR" term="%22Ribeiro%2C+R%2E+M%2E%22">Ribeiro, R. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Eckmann%2C+A%2E%22">Eckmann, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Jalil%2C+R%2E%22">Jalil, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Belle%2C+B%2E+D%2E%22">Belle, B. D.</searchLink><br /><searchLink fieldCode="AR" term="%22Mishchenko%2C+A%2E%22">Mishchenko, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Kim%2C+Y%2E-J%2E%22">Kim, Y.-J.</searchLink><br /><searchLink fieldCode="AR" term="%22Gorbachev%2C+R%2E+V%2E%22">Gorbachev, R. V.</searchLink><br /><searchLink fieldCode="AR" term="%22Georgiou%2C+T%2E%22">Georgiou, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Morozov%2C+S%2E+V%2E%22">Morozov, S. V.</searchLink><br /><searchLink fieldCode="AR" term="%22Grigorenko%2C+A%2E+N%2E%22">Grigorenko, A. N.</searchLink><br /><searchLink fieldCode="AR" term="%22Geim%2C+A%2E+K%2E%22">Geim, A. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Casiraghi%2C+C%2E%22">Casiraghi, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Neto%2C+A%2E+H%2E+Castro%22">Neto, A. H. Castro</searchLink><br /><searchLink fieldCode="AR" term="%22Novoselov%2C+K%2E+S%2E%22">Novoselov, K. S.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 6/14/2013, Vol. 340 Issue 6138, p1311-1314. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Materials+science%22">Materials science</searchLink><br /><searchLink fieldCode="DE" term="%22Heterostructures%22">Heterostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+film+crystallography%22">Thin film crystallography</searchLink><br /><searchLink fieldCode="DE" term="%22Chalcogenide+films%22">Chalcogenide films</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+density+of+states%22">Electronic density of states</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+systems%22">Photovoltaic power systems</searchLink>
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  Data: 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%). [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1126/science.1235547
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        Text: English
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        PageCount: 4
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      – SubjectFull: Heterostructures
        Type: general
      – SubjectFull: Thin film crystallography
        Type: general
      – SubjectFull: Chalcogenide films
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      – SubjectFull: Graphene
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      – SubjectFull: Electronic density of states
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      – SubjectFull: Photovoltaic power systems
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