Plasmon-induced local photocurrent changes in GaAs photovoltaic cells modified with gold nanospheres: A near-field imaging study

Yosuke Harada, Kohei Imura, Hiromi Okamoto, Yoshiaki Nishijima, Kosei Ueno, Hiroaki Misawa

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Modification of photovoltaic devices with metallic nanoparticles is expected to be one of the key methods for development of high performance devices as a future energy source. To clarify the mechanism of photocurrent changes induced by surface plasmon resonances of metal nanoparticles, we measured near-field photocurrent excitation images for a GaAs photodiode modified with gold nanospheres (diameter 100 nm) with a spatial resolution higher than 100 nm. The relationship between the photovoltaic efficiency and the plasmons of the gold nanospheres was investigated through the measurements of incident wavelength and polarization dependence of the near-field photocurrent images. Isolated nanospheres deposited on the GaAs active surface caused local photocurrent suppressions at the plasmon resonance wavelengths. In the case of assemblies (dimers and trimers) of the spheres, a remarkable decrease of photocurrent at the gap site between the spheres was observed. From the results, it turned out that the enhanced optical fields created via the plasmons on the metal nanostructures do not improve the photovoltaic efficiency and that forward scattering of photons by the gold nanoparticles is considered to be more important than the enhanced field effect at the particles for the GaAs photovoltaic device studied.

    Original languageEnglish
    Article number104306
    JournalJournal of Applied Physics
    Volume110
    Issue number10
    DOIs
    Publication statusPublished - 2011 Nov 15

    Fingerprint

    photovoltaic cells
    photocurrents
    near fields
    gold
    plasmons
    nanoparticles
    forward scattering
    energy sources
    trimers
    surface plasmon resonance
    wavelengths
    metals
    assemblies
    photodiodes
    spatial resolution
    dimers
    retarding
    photons
    polarization
    excitation

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Plasmon-induced local photocurrent changes in GaAs photovoltaic cells modified with gold nanospheres : A near-field imaging study. / Harada, Yosuke; Imura, Kohei; Okamoto, Hiromi; Nishijima, Yoshiaki; Ueno, Kosei; Misawa, Hiroaki.

    In: Journal of Applied Physics, Vol. 110, No. 10, 104306, 15.11.2011.

    Research output: Contribution to journalArticle

    Harada, Yosuke ; Imura, Kohei ; Okamoto, Hiromi ; Nishijima, Yoshiaki ; Ueno, Kosei ; Misawa, Hiroaki. / Plasmon-induced local photocurrent changes in GaAs photovoltaic cells modified with gold nanospheres : A near-field imaging study. In: Journal of Applied Physics. 2011 ; Vol. 110, No. 10.
    @article{51d4ece5293a4530af2a6b005ded101c,
    title = "Plasmon-induced local photocurrent changes in GaAs photovoltaic cells modified with gold nanospheres: A near-field imaging study",
    abstract = "Modification of photovoltaic devices with metallic nanoparticles is expected to be one of the key methods for development of high performance devices as a future energy source. To clarify the mechanism of photocurrent changes induced by surface plasmon resonances of metal nanoparticles, we measured near-field photocurrent excitation images for a GaAs photodiode modified with gold nanospheres (diameter 100 nm) with a spatial resolution higher than 100 nm. The relationship between the photovoltaic efficiency and the plasmons of the gold nanospheres was investigated through the measurements of incident wavelength and polarization dependence of the near-field photocurrent images. Isolated nanospheres deposited on the GaAs active surface caused local photocurrent suppressions at the plasmon resonance wavelengths. In the case of assemblies (dimers and trimers) of the spheres, a remarkable decrease of photocurrent at the gap site between the spheres was observed. From the results, it turned out that the enhanced optical fields created via the plasmons on the metal nanostructures do not improve the photovoltaic efficiency and that forward scattering of photons by the gold nanoparticles is considered to be more important than the enhanced field effect at the particles for the GaAs photovoltaic device studied.",
    author = "Yosuke Harada and Kohei Imura and Hiromi Okamoto and Yoshiaki Nishijima and Kosei Ueno and Hiroaki Misawa",
    year = "2011",
    month = "11",
    day = "15",
    doi = "10.1063/1.3662114",
    language = "English",
    volume = "110",
    journal = "Journal of Applied Physics",
    issn = "0021-8979",
    publisher = "American Institute of Physics Publising LLC",
    number = "10",

    }

    TY - JOUR

    T1 - Plasmon-induced local photocurrent changes in GaAs photovoltaic cells modified with gold nanospheres

    T2 - A near-field imaging study

    AU - Harada, Yosuke

    AU - Imura, Kohei

    AU - Okamoto, Hiromi

    AU - Nishijima, Yoshiaki

    AU - Ueno, Kosei

    AU - Misawa, Hiroaki

    PY - 2011/11/15

    Y1 - 2011/11/15

    N2 - Modification of photovoltaic devices with metallic nanoparticles is expected to be one of the key methods for development of high performance devices as a future energy source. To clarify the mechanism of photocurrent changes induced by surface plasmon resonances of metal nanoparticles, we measured near-field photocurrent excitation images for a GaAs photodiode modified with gold nanospheres (diameter 100 nm) with a spatial resolution higher than 100 nm. The relationship between the photovoltaic efficiency and the plasmons of the gold nanospheres was investigated through the measurements of incident wavelength and polarization dependence of the near-field photocurrent images. Isolated nanospheres deposited on the GaAs active surface caused local photocurrent suppressions at the plasmon resonance wavelengths. In the case of assemblies (dimers and trimers) of the spheres, a remarkable decrease of photocurrent at the gap site between the spheres was observed. From the results, it turned out that the enhanced optical fields created via the plasmons on the metal nanostructures do not improve the photovoltaic efficiency and that forward scattering of photons by the gold nanoparticles is considered to be more important than the enhanced field effect at the particles for the GaAs photovoltaic device studied.

    AB - Modification of photovoltaic devices with metallic nanoparticles is expected to be one of the key methods for development of high performance devices as a future energy source. To clarify the mechanism of photocurrent changes induced by surface plasmon resonances of metal nanoparticles, we measured near-field photocurrent excitation images for a GaAs photodiode modified with gold nanospheres (diameter 100 nm) with a spatial resolution higher than 100 nm. The relationship between the photovoltaic efficiency and the plasmons of the gold nanospheres was investigated through the measurements of incident wavelength and polarization dependence of the near-field photocurrent images. Isolated nanospheres deposited on the GaAs active surface caused local photocurrent suppressions at the plasmon resonance wavelengths. In the case of assemblies (dimers and trimers) of the spheres, a remarkable decrease of photocurrent at the gap site between the spheres was observed. From the results, it turned out that the enhanced optical fields created via the plasmons on the metal nanostructures do not improve the photovoltaic efficiency and that forward scattering of photons by the gold nanoparticles is considered to be more important than the enhanced field effect at the particles for the GaAs photovoltaic device studied.

    UR - http://www.scopus.com/inward/record.url?scp=82555165243&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=82555165243&partnerID=8YFLogxK

    U2 - 10.1063/1.3662114

    DO - 10.1063/1.3662114

    M3 - Article

    AN - SCOPUS:82555165243

    VL - 110

    JO - Journal of Applied Physics

    JF - Journal of Applied Physics

    SN - 0021-8979

    IS - 10

    M1 - 104306

    ER -