Role of a disperse carbon interlayer on the performances of tandem a-Si solar cells

We report the effect of a disperse carbon interlayer between the n-a-Si:H layer and an aluminium zinc oxide (AZO) back contact on the performance of amorphous silicon solar cells. Carbon was incorporated to the AZO film as revealed by x-ray photoelectron spectroscopy and energy-dispersive x-ray anal...

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Veröffentlicht in:Science and technology of advanced materials 2013-08, Vol.14 (4), p.045009-9
Hauptverfasser: Araújo, Andreia, Barros, Raquel, Mateus, Tiago, Gaspar, Diana, Neves, Nuno, Vicente, António, Filonovich, Sergej A, Barquinha, Pedro, Fortunato, Elvira, Ferraria, Ana M, Botelho do Rego, Ana M, Bicho, Ana, Águas, Hugo, Martins, Rodrigo
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Sprache:eng
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Zusammenfassung:We report the effect of a disperse carbon interlayer between the n-a-Si:H layer and an aluminium zinc oxide (AZO) back contact on the performance of amorphous silicon solar cells. Carbon was incorporated to the AZO film as revealed by x-ray photoelectron spectroscopy and energy-dispersive x-ray analysis. Solar cells fabricated on glass substrates using AZO in the back contact performed better when a disperse carbon interlayer was present in their structure. They exhibited an initial efficiency of 11%, open-circuit voltage V oc = 1.6 V, short-circuit current J SC = 11 mA cm −2 and a filling factor of 63%, that is, a 10% increase in the J SC and 20% increase in the efficiency compared to a standard solar cell.
ISSN:1468-6996
1878-5514
DOI:10.1088/1468-6996/14/4/045009