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

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 characterizations. A maximum power conversion efficiency of 8.3% has been obtained through controlled addition 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 in both cases but the devices with controlled addition show lesser p- type doping, a low density of charged defects and less band tailing compared to the rest.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C7TA05415G

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