The effect of excess selenium on the opto-electronic properties of Cu<sub>2</sub>ZnSnSe<sub>4</sub> prepared from Cu-Sn alloy precursors.

RSC Adv · 2019 · PMC9065798 · PMID 35515521

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a decreasing trendno p-value reported

3(a) and (b) display the behavior of the [ I 2 ]/[ I 1 ] Raman band ratios, which show a decreasing trend with the increasing selenium amounts; this indicates a compositional shift towards lower Cu/(Zn + Sn) ratio.

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an increasing trendno p-value reported

Starting from 50 mg, one noticeable change is an increasing trend of the band gap towards higher selenium amounts.

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