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Issue 6, 2018
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Doping of Cu2ZnSnSe4 solar cells with Na+ or K+ alkali ions

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Abstract

In this work, the addition of molar concentrations of Na+ and/or K+ in the form of fluorides during the processing of Cu2ZnSnSe4 absorber layers was investigated. The beneficial effect of alkali salts on the performance of CZTSe solar cells has been demonstrated through physical and electrical characterization. A maximum power conversion efficiency of 8.3% has been obtained through controlled addition of Na+ and K+ in the CZTSe absorber as opposed to 6.7% from uncontrolled addition of both. The open circuit voltage in both cases was very much the same but the devices with controlled addition showed lower p-type doping, a low density of charged defects and less band tailing compared to the rest.

Graphical abstract: Doping of Cu2ZnSnSe4 solar cells with Na+ or K+ alkali ions

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Publication details

The article was received on 22 Jun 2017, accepted on 04 Jan 2018 and first published on 08 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA05415G
Citation: J. Mater. Chem. A, 2018,6, 2653-2663
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    Doping of Cu2ZnSnSe4 solar cells with Na+ or K+ alkali ions

    S. Sahayaraj, G. Brammertz, B. Vermang, A. Mule, T. Schnabel, M. Meuris, J. Vleugels and J. Poortmans, J. Mater. Chem. A, 2018, 6, 2653
    DOI: 10.1039/C7TA05415G

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