Plasmon-enhanced internal photoemission for photovoltaics: Theoretical efficiency limits

Thomas P. White*, Kylie R. Catchpole

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    220 Citations (Scopus)

    Abstract

    Plasmon-enhanced internal photoemission in metal-semiconductor Schottky junctions has recently been proposed as an alternative photocurrent mechanism for solar cells. Here, we identify and discuss the requirements for efficient operation of such cells and analyze their performance limits under standard solar illumination. We show that the maximum efficiency limit is 8% even if perfect optical absorption can be achieved using plasmonic nanostructures. This limit results from the fundamental electronic properties of metallic absorbers. Modifying the electron density of states of the absorber could increase the efficiency to > 20%.

    Original languageEnglish
    Article number073905
    JournalApplied Physics Letters
    Volume101
    Issue number7
    DOIs
    Publication statusPublished - 13 Aug 2012

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