Absorption Enhancement for Ultra-Thin Solar Fuel Devices with Plasmonic Gratings
| Autor: | Manley, Phillip, Abdi, Fatwa F., Berglund, Sean, Islam, A. T. M. Nazmul, Burger, Sven, van de Krol, Roel, Schmid, Martina |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | ACS Appl. Energy Mater. 1 p.5810-5815 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1021/acsaem.8b01070 |
| Popis: | We present a concept for an ultra-thin solar fuel device with a nanostructured back contact. Using rigorous simulations we show that the nanostructuring significantly increases the absorption in the semiconductor, CuBi$_2$O$_4$ in this case, by 47\% (5.2~mAcm$^{-2}$) through the excitation of plasmonic modes. We are able to attribute the resonances in the device to metal-insulator-metal plasmons coupled to either localised surface plasmon resonances or surface plasmon polaritons. Rounding applied to the metallic corners leads to a blueshift in the resonance wavelength while maintaining absorption enhancement, thus supporting the possibility for a successful realization of the device. For a 2D array, the tolerance of the polarization-dependent absorption enhancement is investigated and compared to a planar structure. The device maintains an absorption enhancement up to incident angles of 75$^{\circ}$. The study highlights the high potential for plasmonics in ultra-thin opto-electronic devices such as in solar fuel generation. Comment: 4 Figures 18 Pages. Supporting Information Included (7 Figures 11 pages) |
| Databáze: | arXiv |
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