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- W2009809783 abstract "Energy conversion technologies are aiming to extremely high power capacities per year. Nontoxicity and abundance of the materials are the key requirements to a sustainable photovoltaic technology. Oxides are among the key materials to reach these goals. We investigate the influence of thin buffer layers on the performance of an ZnO:Al/buffer/Cu<sub>2</sub>O solar cells. Introduction of a thin ZnO or Al<sub>2</sub>O<sub>3</sub> buffer layer, grown by thermal ALD, between ZnO:Al and Cu<sub>2</sub>O resulted in 45% increase of the solar cell efficiency. VPE growth of Cu<sub>2</sub>O employing elemental copper and pure oxygen as precursor materials is presented. The growth is performed on MgO substrates with the (001) orientation. On- and off- oriented substrates have been employed and the growth results are compared. XRD investigations show the growth of the (110) oriented Cu<sub>2</sub>O for all temperatures, whereas at a high substrate temperature additional (001) Cu<sub>2</sub>O growth occurs. An increase of the oxygen partial pressure leads to a more pronounced 2D growth mode, whereby pores between the islands still remain. The implementation of off-axis substrates with 3.5° and 5° does not lead to an improvement of the layer quality. The (110) orientation remains predominant, the grain size decreases and the FWHM of the (220) peak increases. From the AFM images it is concluded, that the (110) surface grows with a tilt angle to the substrate surface." @default.
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- W2009809783 date "2014-03-08" @default.
- W2009809783 modified "2023-10-16" @default.
- W2009809783 title "Oxides for sustainable photovoltaics with earth-abundant materials" @default.
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- W2009809783 doi "https://doi.org/10.1117/12.2044734" @default.
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