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    The origin of enhanced optical absorption in solar cells with metal nanoparticles embedded in the active layer

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    Type
    Article
    Authors
    Lee, Jung-Yong
    Peumans, Peter
    Date
    2010-04-29
    Online Publication Date
    2010-04-29
    Print Publication Date
    2010-05-10
    Permanent link to this record
    http://hdl.handle.net/10754/599942
    
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    Abstract
    We analyze the enhancement in optical absorption of an absorbing medium when spherical metal nanoparticles are embedded in it. Our analysis uses generalized Mie theory to calculate the absorbed optical power as a function of the distance from the metal nanoparticle. This analysis is used to evaluate the potential of enhancing optical absorption in thin-film solar cells by embedding spherical metal nanoparticles. We consider the trade-off between maximizing overall optical absorption and ensuring that a large fraction of the incident optical power is dissipated in the absorbing host medium rather than in the metal nanoparticle. We show that enhanced optical absorption results from strong scattering by the metal nanoparticle which locally enhances the optical electric fields. We also discuss the effect of a thin dielectric encapsulation of the metal nanoparticles. ©2010 Optical Society of America.
    Citation
    Lee J-Y, Peumans P (2010) The origin of enhanced optical absorption in solar cells with metal nanoparticles embedded in the active layer. Optics Express 18: 10078. Available: http://dx.doi.org/10.1364/OE.18.010078.
    Sponsors
    This work was supported by the National Science Foundation and KAUST (King Abdullah University of Science and Technology). JYL would like to thank The Korea Foundation for Advanced Studies for its support.
    Publisher
    The Optical Society
    Journal
    Optics Express
    DOI
    10.1364/OE.18.010078
    PubMed ID
    20588861
    ae974a485f413a2113503eed53cd6c53
    10.1364/OE.18.010078
    Scopus Count
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