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Issue 2, 2017
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Scalably synthesized environmentally benign, aqueous-based binary nanoparticle inks for Cu2ZnSn(S,Se)4 photovoltaic cells achieving over 9% efficiency

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Abstract

Low-cost materials, scalable manufacturing, and high power conversion efficiency are critical enablers for large-scale applications of photovoltaic (PV) cells. Cu2ZnSn(S,Se)4 (CZTSSe) has emerged as a promising PV material due to its low-cost earth-abundant nature and the low toxicity of its constituents. We present a compact and environmentally friendly route for preparing metal sulfide (metals are Cu, Zn, and Sn) nanoparticles (NPs) and optimize their annealing conditions to obtain uniform carbon-free CZTSSe thin films with large grain sizes. Further, the solution-stable binary NP inks synthesized in an aqueous solution with additives are shown to inhibit the formation of secondary phases during annealing. A laboratory-scale PV cell with a Al/AZO/ZnO/CdS/CZTSSe/Mo-glass structure is fabricated without anti-reflective coatings, and a 9.08% efficiency under AM1.5G illumination is demonstrated for the first time. The developed scalable, energy-efficient, and environmentally sustainable NP synthesis approach can enable integration of NP synthesis with emerging large-area deposition and annealing methods for scalable fabrication of CZTSSe PV cells.

Graphical abstract: Scalably synthesized environmentally benign, aqueous-based binary nanoparticle inks for Cu2ZnSn(S,Se)4 photovoltaic cells achieving over 9% efficiency

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Publication details

The article was received on 02 Nov 2016, accepted on 04 Jan 2017 and first published on 04 Jan 2017


Article type: Paper
DOI: 10.1039/C6SE00035E
Citation: Sustainable Energy Fuels, 2017,1, 267-274
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    Scalably synthesized environmentally benign, aqueous-based binary nanoparticle inks for Cu2ZnSn(S,Se)4 photovoltaic cells achieving over 9% efficiency

    K. Kim, C. Pan, S. Bansal, R. Malhotra, D. Kim and C. Chang, Sustainable Energy Fuels, 2017, 1, 267
    DOI: 10.1039/C6SE00035E

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