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Improvement of carrier collection in Si/a-Si:H nanowire solar cells by using hybrid ITO/silver nanowires contacts

Abstract : Optoelectronic devices based on high aspect ratio nanowires bring new challenges for transparent electrodes, which can be well addressed by using hybrid structures. Here we demonstrate that a composite contact to radial junction nanowire solar cells made of a thin indium-tin oxide (ITO) layer and silver nanowires greatly improves the collection of charge carriers as compared to a single thick ITO layer by reducing the series resistance losses while improving the transparency. The optimization is performed on p-in solar cells comprising of dense non-vertical nanowires with a p-doped c-Si core and an ultra-thin a-Si:H absorption layer grown by plasma-enhanced chemical vapor deposition on glass substrates. The optimal hybrid contact developed in this work is demonstrated to increase the solar cell conversion efficiency from 4.3% to 6.6%.
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https://hal.archives-ouvertes.fr/hal-03031135
Contributor : Maria Tchernycheva <>
Submitted on : Monday, November 30, 2020 - 1:16:26 PM
Last modification on : Friday, December 11, 2020 - 12:42:03 PM

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Tiphaine Mathieu-Pennober, Martin Foldyna, Shan-Ting Zhang, François Julien, Nathanaelle Schneider, et al.. Improvement of carrier collection in Si/a-Si:H nanowire solar cells by using hybrid ITO/silver nanowires contacts. Nanotechnology, Institute of Physics, 2020, 31 (43), pp.435408. ⟨10.1088/1361-6528/aba4ce⟩. ⟨hal-03031135⟩

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