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首页> 外文期刊>Nanotechnology >Chemical insights into the formation of Cu2ZnSnS4 films from all-aqueous dispersions for low-cost solar cells
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Chemical insights into the formation of Cu2ZnSnS4 films from all-aqueous dispersions for low-cost solar cells

机译：化学洞察中，从全水分散体形成Cu2ZnSNS4薄膜，用于低成本太阳能电池

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摘要

Cu2ZnSnS4 (CZTS) shows great potential for photovoltaic application because of its non-toxic earth-abundant components and good optoelectronic properties. Combining low-cost and environmentally friendly routes would be the most favorable approach for the development of CZTS solar cells. In this context, development of Cu2ZnSnS4 (CZTS) films from all-aqueous CZTS nanocrystals inks represents an interesting challenge. Here, we have highlighted a condensation regulation by the alkali ion size observed in the alkali series Li+ < Na+ < K+ < Rb+ < Cs+, and demonstrated the chemical stability of Cu2ZnSnS4 surfaces in basic aqueous dispersions. Data such as optimal nanocrystal size, critical cracking thickness and average thickness to fabricate micron crack-free films from all-aqueous chalcogenide nanocrystals dispersions were determined. From these results, a proof of concept for the formation of a crack-free film of 2.2 mu m formed from an all-aqueous CZTS nanocrystals ink is given. When employing low-cost materials, removal of carbon impurities represents another important challenge. With the objective to fabricate residue-free films, a specific annealing strategy is proposed involving a high temperature purification step under Se partial pressure. Carbon removal is thus achieved via the CSe2 gas formation, simultaneously to the amorphous domains crystallization as demonstrated by Raman spectroscopy. These source data favoring the formation of residue-free, crack-free, annealed films should assist the large scale development of CZTS solar cells from low-cost and environmentally friendly, all-aqueous inks.
机译：Cu2ZNSN4（CZTS）显示出光伏应用的巨大潜力，因为其无毒的地球丰富的组件和良好的光电性能。结合低成本和环保的路线将是CZTS太阳能电池开发最有利的方法。在这种情况下，来自全含水CZTS纳米晶体墨水的Cu2ZNS4（CZTS）薄膜的发展代表了一个有趣的挑战。这里，我们突出了在碱系列Li +

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