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Issue 5, 2012
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Low band gap liquid-processed CZTSe solar cell with 10.1% efficiency

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Abstract

A low band gap liquid-processed Cu2ZnSn(Se1−xSx)4 (CZTSSe) kesterite solar cell with x ≈ 0.03 is prepared from earth abundant metals, yielding 10.1% power conversion efficiency. This champion cell shows a band gap of 1.04 eV, higher minority-carrier lifetime, lower series resistance and lower Voc deficit compared to our previously reported higher band gap (Eg = 1.15 eV; x ≈ 0.4) cell with similar record efficiency. The ability to vary the CZTSSe band gap using sulfur content (i.e., varying x) facilitates the examination of factors limiting performance in the current generation of CZTSSe devices, as part of the thrust to achieve operational parity with CdTe and Cu(In,Ga)(S,Se)2 (CIGSSe) analogs.

Graphical abstract: Low band gap liquid-processed CZTSe solar cell with 10.1% efficiency

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Publication details

The article was received on 07 Jan 2012, accepted on 23 Feb 2012 and first published on 24 Feb 2012


Article type: Paper
DOI: 10.1039/C2EE00056C
Citation: Energy Environ. Sci., 2012,5, 7060-7065
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    Low band gap liquid-processed CZTSe solar cell with 10.1% efficiency

    S. Bag, O. Gunawan, T. Gokmen, Y. Zhu, T. K. Todorov and D. B. Mitzi, Energy Environ. Sci., 2012, 5, 7060
    DOI: 10.1039/C2EE00056C

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