Toward omnidirectional light absorption by plasmonic effect for high-efficiency flexible nonvacuum Cu(In,Ga)Se2 thin film solar cells

Shih Chen Chen, Yi Ju Chen, Wei Ting Chen, Yu Ting Yen, Tsung-Sheng Kao, Tsung Yeh Chuang, Yu Kuang Liao, Kaung-Hsiung Wu, Atsushi Yabushita, Tung Po Hsieh, Martin D.B. Charlton, Din Ping Tsai, Hao-Chung Kuo*, Yu Lun Chueh

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    27 Scopus citations

    Abstract

    We have successfully demonstrated a great advantage of plasmonic Au nanoparticles for efficient enhancement of Cu(In,Ga)Se2(CIGS) flexible photovoltaic devices. The incorporation of Au NPs can eliminate obstacles in the way of developing ink-printing CIGS flexible thin film photovoltaics (TFPV), such as poor absorption at wavelengths in the high intensity region of solar spectrum, and that occurs significantly at large incident angle of solar irradiation. The enhancement of external quantum efficiency and photocurrent have been systematically analyzed via the calculated electromagnetic field distribution. Finally, the major benefits of the localized surface plasmon resonances (LSPR) in visible wavelength have been investigated by ultrabroadband pump-probe spectroscopy, providing a solid evidence on the strong absorption and reduction of surface recombination that increases electron-hole generation and improves the carrier transportation in the vicinity of pn-juction.

    Original languageEnglish
    Pages (from-to)9341-9348
    Number of pages8
    JournalACS Nano
    Volume8
    Issue number9
    DOIs
    StatePublished - 23 Sep 2014

    Keywords

    • Cu(In,Ga)Se2
    • flexible
    • nanoparticles
    • omnidirectional light absorption
    • plasmonic effect
    • solar Cell

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